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GOES ABI Calibration Events Log

This is a collection of events that, at the discretion of the GOES-R Calibration Working Group (CWG), have known or potential impact on L1b data quality. It is maintained by the CWG throughout the instrument mission life for ABI L1b users, producers, calibration specialists, managers, vendors, international partners, and members of the public interested in ABI calibration. For other ABI related events, please check the link below:

https://www.ospo.noaa.gov/Operations/messages.html

(Click column headings to sort; Type in the "Search" box to query table contents.)

Event	StartDate	EndDate	Description
B16 LUT update	05/10/2019	05/10/2019	The lunar rejection threshold of Band 16 was updated to reduce the potential striping caused by detector noise.
Navigation parameters update	6/1/2017	6/15/2017	RDP values are updated
Intermittent Channel 8 striping	12/31/2018	01/31/2019	repeated striping due to anomalous performance of det #208 and #107. Corrected with the BDS update of det #208 and manual space look reset of #107
ABI Band02 is ~7% brighter than VIIRS	6/1/2017		G16 ABI Band2 (0.64um) is brighter than VIIR I1band by ~6-8%, depending on time.
B05 Striping associated with Detector #200/#201	6/1/2017	6/24/2019	Persist striping patterns are detected associated with bad performance from Dectector #200/#201
B10 D312 Striping and BDS Update	6/1/2017	10/3/2017	Striping was caused by B10 Detector #312 and was removed with the BDS update on 10/03/2017
B12 D257 Striping and BDS Update	6/1/2017	10/3/2017	Striping was caused by B12 Detector #257 and was removed with the BDS update on 10/03/2017
Cold pixels around fire	6/1/2017	4/23/2019	For the 3.9um channel (B07, and for this band only), some pixels around (usually not immediately next to) extremely hot targets such as fire have substatially cold bias. The affected pixels are properly flagged. Corrected onon 04/23/2019. Major navigation upgrade,6/1/2017,,Upgrade elements: (i) static FPA shifts are absorbed into the LUTs; (ii) GNC gyro rate capping is adjusted. Upgrade effects: (i) navigation disturbances from the Kalman filter reset are reduced several times; (ii) navigation stability is increased. Periodic IR Calibration Anomaly (PICA),6/1/2017,10/19/2017,PICA was a periodic radiometric calibration anomaly with 15 minutes of periodicity observed at GOES-16 ABI Mode-3 MESO and CONUS images caused by the residual of incident angle-dependent scan mirror emissivity corrections. It was corrected with the update of scan-mirror emissivity LUTs on 10/19/2017. Sub-optimal solar calibration for VNIR Channels,01/15/2017,12/12/2017,Until 12 December 2017
ICT Temperature Bias	6/1/2017	6/19/2018	The ICT PRT coefficients that converted the PRT raw counts into temperatures were inconsistent with the values from the correct vendor source. This discrepancy led to a -0.2 K bias to the calculated ICT temperatures and colder bias of similar magnitude of the L1b products for all the IR channels. On 19 June 2018, the revised LUT was implemented in GS data processing and resulted in improved radiometric calibration accuracy.
GOES-16 Drifted from 89.5W to 89.2W	8/8/2017	9/3/2017	GOES-16 drifted from 89.5W to 89.2W for the purpose of testing potential impacts related to shifting GOES-16 operational station keeping position from 75.0W to 85.2W.
Transient navigation anomalies	9/28/2017		Anomalies involve large and sudden East-West and/or North-South navigation swings exceeding MRD limits. The reason identified as an intermittent loss of the gyro rate information in the Ground processing. The fix extrapolates observed gyro rate onto the period of absence.
B05 Striping caused by incorrect of use of Look-up table	11/19/2017	12/29/2017	In-correct solar calibration LUT (pre-launch solar calibration coefficient) was used, resulting stronger striping at B05 during this period
Major navigation upgrade	11/20/2017	11/22/2017	Upgrade elements: (i) RDP correction for rotation and stretch; (ii) diagonal scan is implemented for 064 star detection; (iii) dynamic LMC is implemented; (iv) Kalman filter retuned. Upgrade effects: significant reduction of all MRD-specified navigation errors to well-below the specs. Deficiency: Kalman filter-induced instability remains in the navigation of thermal channels, though the magnitude is significantly reduced.
GOES-16 Drifted from 89.3W to 75.2W	11/29/2017	12/18/2017	GOES-16 station keeping relocated from the 89.3W Test location to its 75.2W operational location,and intruments re-evaluted for operational readiness.
B05 10% jump	12/12/2017	12/29/2017	In-correct B05 solar calibration coefficient was used during this period GOES-16 ABI L1B data operational
B12 D290/291 Striping and BDS update	12/30/2017	1/2/2018	Stripings have been detected for B12 D290 & D291 and the corresponding stripes were removed with the BDS update on 01/02/2018
VNIR Operational Algorithm Update	1/17/2018	2/7/2018	A new calibration algorithm was operationally implemented to reduce the VNIR striping observed since in-orbit. This implementation was accomplished with two steps: the first step was the upload of the new detector non-linearity (Q) LUT for B01/B02/B03 on 01/17/2018 and the second step was to implement the new algorith using Q-scaling on 02/07/2018. This new algorithm resulted in significant reduce in striping at B01/B02/B03 and slight change in the VNIR radiometric calibration accuracy. No change in B05 striping.
Sub-optimal solar calibration for VNIR channels	2/14/2018	2/20/2018	The three extra solar calirbation events were conducted to simulate the similar illumination condition for the solar calibration event conducted at about one year ago
B12 D309 Striping and BDS update	2/26/2018	3/5/2018	Striping was caused by B12 Detector #309 and was removed with the BDS update on 03/05/2018
Solar Intrusion	3/2/2018		Strong stray light appearing mostly in the Southern hemisphere. Two possible reasons: (i) Earth exclusion zone was not updated for the actual GOES-EAST position at -75.2 degrees; (ii) atmospheric refraction was not taken into account in the calculations of the Earth exclusion zone
Super Caterpillar Tracks	3/26/2018	3/26/2018	SCT correlates with the scan angle deviations, encoder spike flags, and enhanced high-energy electron flux in SEISS.
Sub-optimal solar calibration for VNIR channels	3/27/2018	3/27/2018	This extra solar calibration was conducted to simulate the similar illumination condition for the solar calibration event at about one year ago
VNIR 10% jumps	4/10/2018	4/10/2018	All 6 VNIR channels experienced ~10% jumps in the radioemtric calirbation accuracy due to the incorrect use of solar calibration coefficients
Sub-optimal solar calibration for VNIR channels	4/24/2018	4/24/2018	This extra solar calibration was conducted to simulate the similar illumination condition for the solar calibration event at about one year ago
Earth Orientation Parameter Predictions (EOPP) Correction	4/27/2018		Time format mismatch between GPS and ABI is identified and removed. In the past, that led to a small navigation bias for all channels. It was temporarily compensated since June 2018 by a constant correction. However, the bias is time dependent, so only now it is permanently fixed.
Channel 8 striping	4/29/2018	4/29/2018	Channel 8 striping was discovered. Caused by detector response level shifts (observed by both SPL and ICT data) with Detector #286 (Indexing from zero). It was discovered that the space look (SPL) used to calculate the operational calibration coefficients was locked during this period
Channel 10 striping and BDS update	5/19/2018	5/22/2018	Channel 10 striping was discovered. Caused by ground processing spacelook latchup after Detector #294 (indexing from zero) response level shifts (observed by both SPL and ICT data). Corrected with a BDS change.
Channel 10 Striping	6/3/2018	6/4/2018	Channel 10 striping was discovered. Caused by ground processing spacelook latchup after Detector #156 (indexing from zero) response level shifts (observed by both SPL and ICT data). This led to a bias of affected pixels that appears as a strip in image. Corrected by resetting space look count.
Channel 9 Striping	6/4/2018	6/4/2018	Channel 9 striping was discovered. Caused by ground processing spacelook latchup after Detector #303 (indexing from zero) response level shifts (observed by both SPL and ICT data). This led to a bias of affected pixels that appears as a strip in image. Corrected by resetting space look count.
Transient navigation anomaly fixed	10/15/2018	10/15/2018	Large navigation errors in all channels lasting for about one hour with a random occurrence were associated with the gaps in the Ground gyro rate processing and fixed in the Ground software upgrade.
Channel 9 striping and BDS update	10/27/2018	11/2/2018	Striping was discovered. Corrected with the BDS update.
Erroneous radiometric cal for VNIR bands	01/18/2019	01/22/2019	Incorrect VNIR bands gain began at 15:00UTC on 01/18/2019 and ended at 16:00UTC on 01/22/2019.Obvious striping was observed in bands 1 and 2 during the period.
Missing INST-CAL-M2 and EPH on 12/26/2018	12/26/2018	12/26/2018	Missing INST-CAL-M2 and EPH on 12/26/2018 from GS. However
DO.07 has a code bug in implemetation of CDRL 80 Rev F	10/15/2018		In equation 6.5-1 the integration factor was erroneously divided twice during the Q-scaling in DO.07.( WR5407/WR6348).
Mode 6 72-hour test run	2/19/2019	2/22/2019	Default Mode 6 version was run from 15 to 15 UTC.
GOES-16 HBT thruster Flush	3/12/2019	3/12/2019	A GOES-16 HBT Flush was performed from 2305UTC to 2315UTC with 10 minutes of product outage.Product navigation may be degraded for up to 45 minutes after the conclusion of the HBT flush. Event ended with a navigation anomaly - soft reset of Kalman filter elevating the image navigation errors for about three hours.
A persistent shift of BTD in GOES-16	6/15/2017		Bob Kuligowski group found a persistent shift in the time series of max and min bands 11-13 BTD values since 15 June 2017.
G16 band16 striping	03/31/2019	03/31/2019	Channel 16 detector #211 (0-based index) spacelook count mean was locked (latch-up) from 00:00z to 18:40z on 2019-03-31. Leading to more serious striping during the period. The latch-up was caused and released automatically with the random fluctuation of the spacelook.
G16 Transition to Mode 6	04/02/2019		New baseline Mode 6A is started at 16:00 UTC ; it replaced Mode 3E; link: https://www.ospo.noaa.gov/Operations/GOES/16/GOES-16%20Scan%20Mode%206.html
Unexpected G16 VNIR gain jumps	04/08/2019	04/09/2019	All the G16 VNIR bands experienced a unexpected large jump (>10%) after the GS software update (DO.07.02) on 04/08/2019. An unknown origin of the gains were used after this GS update. On 04/09/2019 the previous solar cal gain values derived with DO.07 using the 03/26 solar cal. data were re-applied to generate L1B data. Visible striping can be observed in the G16 L1B images during this abnormal period.
CPAF Update	04/23/2019	04/23/2019	Band 7 resampler updated at 20:15 UTC to correct the cold pixels around fire (CPAF).
G16 B02 bias correction	04/23/2019		1)GOES-16 new B02 K-LUT was implemented on GS at 11:00UTC on 04/23/2019(B02 with CWG's delivery. The other bands corrected with CDRL079_FM1_RevF); 2) calibration algorithm with RevG 3) instrument-to-spacecraft alignment angles with CDRL79-FM1_RevM. The major impact is that G16 B02 radiance is reduced by about ~6.2%.
North-South navigation anomaly	4/13/2019	04/13/2019	Anomalous North-South navigation shifts were observed by CWG in the full disk image at 23:00 UTC. The shift is strongest in the VNIR channels (up to 6 urad). The CONUS and MESO images produced in the period 23:00 to 23:10 may also be affected.
Navigation anomaly	05/04/2019	05/04/2019	Navigation anomaly and gap in data occurred from 12:00 to 13:00 UTC. IR channels may feature slightly elevated navigation errors (by less than 10 urad) during the next 24 hours.
Update the Kalman filter control LUTs	05/10/2019	05/10/2019	Deployed at 15:29 UTC this update is a temporary fix for the anomaly reported by ADR 955. This temporary fix will resolve the periodic Kalman filter issues that have been seen in the recent weeks and reported in ADR 955. The fix will be removed when the full fix is delivered in DO 09.
Update of Solar Avoidance Earth Mask	8/30/2018	8/30/2018	A new solar avoidance earth mask is implemented to: (1) Compensate for the difference as GOES-16 flying as GOES-East at 75.2W longitude while G16 ABI on-board configuration at 75.0W; and (2) Avoid of atmospheric refraction effects. Data outage occurred at 17:10Z - 17:15Z.
Possible image navigation problems	07/10/2019	07/10/2019	ABI images taken around 15:30 UTC may have navigation problems due to not fully-compensated moment adjustment.
Major upgrade of Product Generation (PG) at Ground System(GS) to DO.08.00.02	7/25/2019		including the correction of several issues concerning L1b products and the implementation of Predictive Calibration to improve GOES-17 Channel 8-16 calibration when the FPM temperature becomes unstable.
G16 ABI synchronization anomaly with PDA processing	08/17/2019	08/17/2019	For the period from 2019-08-17 0600 UTC to 2019-08-17 1650 UTC
G16 ABI synchronization anomaly with PDA processing	08/17/2019	08/18/2019	For the period from 2019-08-17 2120 UTC to 2019-08-18 0340 UTC
G16 band 9 stripes	08/26/2019	08/27/2019	G16 Channel 9 detector #31 (0-based index) spacelook count mean was locked (latch-up) at 22:30z on 2019-08-26 and caused stripes in L1b image after the time.The latch-up was released by manual spacelook reset at 12:26z on 2019-08-27 and the stripes disappear.
G16 ABI navigation anomaly	08/23/2019	08/23/2019	Navigation shift is detected by CENRAIS in the full-disk image of 20:30 UTC in the EW direction for all channels and for VNIR channels in NS direction. In the channel 2 image the shift is about 23 microradians in the East direction and 6 microradians in the South direction. Similar shifts may be present in the other imagery taken between 20:30 and 20:40 UTC.
G16 maneuver	10/30/2019	10/30/2019	ABI on GOES-16 had a scheduled data outage from 22:50 to 23:00 UTC due to the satellite maneuver. The images between 23:00 and 23:10 may have blank spaces
G16 navigation anomaly	11/01/2019	11/01/2019	ABI on GOES-16 had a data outage from 13:10 to 13:40 UTC due to antenna outage (intermediate frequency distribution switching switch error). During this period the images may have blank spaces and feature large navigation errors or be absent. First good full disk image is timed by 13:40 UTC.
G16 new Mode 6 took place in operation	11/22/2019	11/22/2019	The new G16 Mode 6 timeline took place in operation from 16:10 UTC.
GOES-16 L1b Data Gap	11/12/2019	11/12/2019	Based on ESPC GOES-R email notification G16 Product outage (ground failover) from 18:25-18:50 UTC for product delivered to PDA and GRB. G16 FD image at 1820. 1830 and 1840 UTC were missing.
GOES-16 L1b Data Gap	11/13/2019	11/13/2019	G16 FD image at 18:10 UTC was found missing and 18:20 image is incomplete due to the ground processing switching. That may also apply to the images in other formats.
GOES-16 L1b Data Gap	11/22/2019	11/22/2019	Due to the ABI Fine Track Error Calibration the GOES 16 ABI L1b data was missing for 10 minutes (1600-1610 UTC).
ABI FTE verification	11/25/2019	11/25/2019	Due to the ABI Fine Track Error Verification the GOES 16 ABI L1b full-disk images at 1700 and 1710 UTC were missing. That may also apply to the images in other formats.
L1b Data Gap	11/13/2019	11/13/2019	G16 FD image at 18:10 UTC was found missing and 18:20 image is incomplete due to the ground processing switching. That may also apply to the images in other formats.
Channel 10 Striping	12/04/2019	12/06/2019	G16 Channl 10 detector#221 (0-based index) spacelook count mean was locked (latch-up) at 16:00Z on 2019-12-04 and caused stripes in L1b images. The latch-up was released by mannual spacelook reset on 2019-12-05 and the stripes disappear. The BDS of this detector was updated at 15:05Z on 2019-12-06 that completed the resolution of this anomaly.
Channel 12 Striping	12/05/2019	12/18/2019	G16 Channel 12 detector #96 (0-based index) spacelook count mean was locked (latch-up) at 16:10Z on 2019-12-05 and caused stripes in L1b images. The latch-up was released by manual spacelook reset on the same day at 19:50Z and the stripes disappear temporarily. Repeated "latch-up" occurred several times later and caused stripes in L1b images. The BDS was updated on 12/18/2019 to resolve this issue.
Band 10 Striping	12/30/2019	12/31/2019	G16 band 10 detector#300 (0-based index) spacelook count mean was locked (latch-up) at 04:00Z and caused stripes in L1b images. The latch-up was released by the BDS update of the detector on 12/31 at ~16:00Z.
B08 striping and BDS update	03/03/2020	03/05/2020	G16 band 8 detector #148 (0-based index) BDS was updated at ~14:25UTC on 03/05/2020 to resolve the image striping caused by the unstable detector responsibility starting at ~10:28UTC on 03/03/2020.
Real-time op. instr. cal files outage	02/23/2020		The real-time operational instrument calibration files are not available via PDA.
G16 Navigation Anomaly	2/8/2020	2/8/2020	Elevated navigation errors was observed in all channels for the 20:50 UTC image. Anomaly is similar to the other events related to a gyro rate loss.
G16 Navigation Anomaly	2/10/2020	2/10/2020	Elevated navigation errors was observed in all IR channels for the 5:10 UTC image. Anomaly is similar to the other events related to a gyro rate loss.
GOES-16 INR anomaly	05/04/2020	05/04/2020	Large North-South image navigation errors in the 12:00 UTC FD images (other formats may also be affected close to that time) due to reset of the Kalman filter. Channel errors are up to 40 urad for IR and up to 12 urad for VNIR channels. Details are in the presentation by S. Guo and V. Kondratovich at the 2020-05-27 CWG meeting.
GOES-16 INR anomaly	05/28/2020	05/28/2020	Elevated East-West and North-South FD image navigation errors at 7:10 UTC due to a gyro rate gap. Channel errors are up to 15 urad. Other image formats between 7:00 and 7:10 UTC may also be affected. Details are in the presentation by V. Kondratovich and S. Guo at 2020-06-03 CWG meeting.
GOES-16 HBT Flush	06/23/2020	06/23/2020	HBT thruster flush was performed as scheduled at 23:00 UTC. No images from 23:00 to 23:10 except partial full-disk image at 23:00. Details are in the presentation by S. Guo and V. Kondratovich at the 2020-06-30 CWG meeting.
G16 ABI Reset Anomaly	07/26/2020	07/27/2020	Due to an instrument reset anomaly G16 ABI experienced an about six and half hours of L1B data outage from ~20:36Z on 07/26/2020 to 03:00z on 07/27/2020. Abundant stripings from weak to moderate magnitudes can be seen at Band16 images between 03:00- ~03:26z. It was followed by the striping caused by one single detector till ~04:24z. Details in the talk in the CWG meeting on 07/29/2020.
B10 striping and BDS update	07/28/2020	08/07/2020	The BDS of B10 Row#036 was updated at ~15:42z on 08/07/2020 to resolve the intermittent striping caused by the unstable detector starting at ~01:50z on 07/28/2020. More information is available at the status report in the 08/12/2020 CWG meeting.
B12 striping	09/17/2020	09/17/2020	Striping can be observed at G16 B12 images from 02:06UTC to 14:20UTC on 09/17/2020. This striping was caused by the spacelook latch-up. Details will be available in the CWG report on 09/23/2020.
B10 Striping & BDS update	09/17/2020	09/22/2020	Band10 images experienced striping caused by a noisy and unstable detector (Det#073). The issue was resolved with the BDS on 09/22/2020. Detailed information was reported in the CWG meeting on 09/23/2020.
B08 striping	09/05/2020	09/23/2020	Striping may be observed at B08 images from ~00:24 - 23:10z on 09/05/2020 and from 04:47 - 06:17z on 09/23/2020. The striping was caused by the latched spacelook of Det#273 during this period. Details can be found in the CWG meeting report on 09/09/2020 and 09/23/2020.
B10 striping	09/23/2020	09/23/2020	B10 images experienced a short-term striping between 14:40 - 14:50z on 09/23/2020. The striping was caused by the spacelook latch-up of Det#245 during this period.
G16 B01 solar cal data anomaly	09/17/2020	09/17/2020	After the solar calibration event on 09/17/2020 the G16 B01 images were black for 3.5 hours (11:00UTC to 14:30UTC) . This anomaly was caused by the erroneous B01 solar calibration data and was corrected by restoring the previous solar cal data conducted on 06/18/2020. Detailed information can be found in CWG meeting on 09/23/2020.
Band 01 gain update	11/04/2020	11/04/2020	A new set of GOES-16 Band 01 gains which were generated based on the solar calibration event on 09/17/2020 were applied at 22:29Z on Nov 4 2020. This is to correct the original solar calibration processing anomaly on 17 Sep 2020. Users may see a small shift (approximately 0.6%) in the B01 radiances due to this change.
B16 striping	11/21/2020	12/10/2020	The G16 B16 images experienced intermittent striping from 11/21/2020 at ~21:15 UTC to 12/10/2020 at ~22:19 UTC. The striping was caused by the unstable response of Det#211 during this period. References: CWG meetings on 12/02/2020 - 12/16/2020.
B09 striping	12/10/2020	12/10/2020	The G16 B09 images experienced striping from 12:10 UTC to ~17:30 UTC on 12/10/2020. This striping was caused by the spacelook latchup of Det#178. Reference: CWG meeting on 12/16/2020.
B02 stripes	12/15/2020	12/15/2020	Broad black stripes can be observed at the G16 B02 images from ~11:00Z to 15:47Z after the solar calibration event on 12/15/2020. Details at the CWG slides on 12/16/2020.
B10 striping	12/24/2020	12/24/2020	Striping at G16 B10 may be observed on 12/24/2020. It was caused by the space-look latch-up due to a sudden response change at det#094 at 10:43 UTC. The striping disappeared as the latched spacelook was naturally released at ~14:01 UTC. Details in the CWG meeting report on 01/06/2021.
B11 striping	12/31/2020	01/01/2021	Striping at G16 B11 may be observed from ~23:04 UTC on 12/31/2020 to ~15:40 UTC on 01/01/2021. This was caused by the latched space-look due to a sudden change of a detector response (det#234) at ~23:04 UTC on 12/31/2020. The striping disappeared as the latched spacelook was manually released at ~15:40 UTC on 01/01/2021. Details in the CWG meeting report on 01/06/2021.
B14 Striping and BDS update	12/22/2020	01/05/2021	Striping may be observed at B14 L1b images from 12/22/2020 and 01/05/2020. It was resolved with the BDS update for Det#240 on 01/05/2020. Details available in the CWG meeting on 01/06/2021
B08 Striping	01/05/2021	01/05/2021	B08 L1b images display a weak to moderate striping from ~06:58Z to ~14:14Z on 01/05/2021 due to the latch-up of the spacelook count for Det273. Details available in the CWG meeting on 01/06/2021.
ABI data outage	01/07/2021	01/07/2021	No ABI images were produced from 16:00 to 16:19 UTC due to the scheduled encoder calibration. Some blank FD images and partial MESO1 images were found for 16:00 UTC. No degradation was observed in the images produced outside of the period of calibration. Refer to CWG presentation by Song Guo and Vladimir Kondratovich on 1/13/2021.
ABI data outage	01/07/2021	01/07/2021	No ABI images were produced from 17:30 to 17:49 UTC due to the scheduled fine track error calibration. No degradation was observed in the images produced outside of the period of calibration. Refer to CWG presentation by Song Guo and Vladimir Kondratovich on 1/13/2021.
Degraded and missing images	01/19/2021	01/19/2021	Partial FD images at 17:30 and 17:40 UTC. Partial CONUS images for 17:31 UTC and no CONUS images for 17:36 UTC. Partial MESO1 images for 17:33-17:34 UTC. No MESO2 images for 17:33 UTC and partial MESO2 images for 17:34 UTC. Elevated navigation residuals at 17:50 UTC FD and CONUS images. Refer to Song Guo and Vladimir Kondratovich slides at the CWG meeting on 2021-01-27.
Image gap	01/21/2021	01/21/2021	Because of the work on flight software (FSW) update
Band15 striping	01/21/2021	01/22/2021	Weak to moderate striping can be observed in the G16 B15 images after the FSW update from 22:10 UTC on 01/21/2021 to 13:30 UTC on 01/22/2021. The striping was caused by the response level-shift induced spacelook latch-up. Details in the slides at the CWG meeting on 2021-01-27.
B07 striping	01/27/2021	01/27/2021	G16 B07 images experienced degraded images from 06:12Z to ~14:12Z on 01/27/2021. Root cause is likely due to the detectors' response to the space weather event. Details at the reports in the CWG meeting on 01/27/2021.
Bad Images Related to the Solar Cal Event	03/15/2021	03/15/2021	The GOES-16 all-band full-disk images at 11:10 UTC were incomplete as the result of the solar calibration event starting at 11:11 UTC. The B01 image was filled with fillvalue and B02 displayed broad black stripes at 11:15UTC. All the images returned to normal at 11:20 UTC. As part of the contingent plan to resolve the solar calibration anomalies occurred in 2020; there was no update of the solar calibration coefficients after this solar calibration event. Detailed information can be found in the CWG meeting on 03/17/2021.
VNIR channel gains update via BYOG	04/05/2021	04/05/2021	GOES-16 VNIR channel gains were implemented into operation via Bright-Your-Own-Gain (BYOG) at 17:51 UTC on 5 April 2021. The gain CWG delivered was based on the scheduled solar calibration event conducted on 03/15/2021. The effort was to minimize the impact of abnormal PG solar calibration processing. Detailed information can be found in the CWG meeting on 03/31/2021 and 04/07/2021.
B12 Stripings & one BDS update	04/19/2021	05/05/2021	Stripings at different locations can be observed at B12 images during this period. The BDS update for Det#188 was conducted on 05/05/2021. Details are available in the CWG meeting reports on 04/21/2021 ; 04/28/2021 and 05/05/2021.
B08 Striping	05/13/2021	05/13/2021	Striping appeared in the G16 B08 images between 08:16Z and 14:22Z on 05/13/2021. Details in the CWG presentation on 05/19/2021.
G16 data outage	05/05/2021	05/05/2021	BI on GOES-16 had a data outage from 20:50 to 21:39 UTC due to a spacecraft maintenance work. During this period all images are absent. The images around this gap have nominal navigation. Detailed discussion was presented at 2021-05-12 CWG meeting by S. Guo and V. Kondratovich.
B10 striping and BDS update	06/09/2021	06/10/2021	G16 B10 displayed some striping in the images collected on 06/09/2021 and 06/10/2021. A BDS event was conducted on 06/15/2021. More details available in the reports presented in the CWG meeting on 06/16/2021.
ABI image sequential anomaly	05/29/2021	05/29/2021	ABI L1b all channel images were not distributed between 20:59-21:35 UTC. Partial FD images were distributed at 21:30. Refer to ESPC Notification and S. Guo and V. Kondratovich CWG meeting presentation on 6/02/2021.
B09 striping and BDS update	06/14/2021	06/24/2021	G16 B09 images displayed intermittent striping since 06/14/2021. The issue was resolved with a BDS update on 06/24/2021. Details are available in the CWG meeting report on 06/23/2021.
B09 striping	07/16/2021	07/16/2021	B09 images displayed strong striping from 09:20 - 09:30Z on 07/16/2021. Root cause investigation was reported in the CWG meeting on 07/28/2021.
Striping in MESO2 images by a lunar intrusion	08/23/2021	08/23/2021	Apparent striping lines were observed in B08/09 MESO2 L1b images only at ~18:29 UTC on 08/23/2021. It was caused by a defect in the ELR algorithm. Detailed information is available in the CWG presentation on 09/22/2021.
Single thin stripe on B09	11/16/2021	11/16/2021	A thin stripe was present in a single swath due to lunar intrusion into the space look. The single pixel stripe is caused by a known issue in the enhanced lunar rejection algorithm. The contaminated spacelook observations occurred on B09 on 11/16 during the 1410Z timeline.
Single thin stripe by lunar intrusion	10/17/2021	10/18/2021	A thin single-pixel stripe was present in a single swath in two separate timelines caused by a known issue in ELR. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: 10/17 1410Z band 11 and 10/18 1440Z bands 10. Reference: CWG meeting slides by D. Goldberg on 10/27/2021.
Single thin stripe on B08	12/11/2021	12/11/2021	Description: A thin stripe was present in a single swath due to lunar intrusion into the space look. The single pixel stripe is caused by a known issue in the enhanced lunar rejection algorithm. The contaminated spacelook observations occurred on B08 on 12/11 during the 1040Z timeline (at 10:48:35Z). Details in the CWG meeting on 12/22/2021.
Striping caused by lunar intrusion	02/18/2022	02/20/2022	Stripes and some broad faint striping were present in select products due to lunar intrusion into the space look during their timelines. The single pixel stripes are caused by a known issue in the enhanced lunar rejection algorithm. The contaminated spacelook observations occurred on B08 and 14 on the FD on 2/18 at 19:30Z; on 2/19 at 2025 impacting FD B08 (2020Z) M1 B07 08 16 (2025Z) and M2 B08 (2024Z); and on 2/20 at 2059Z impacting B09 FD (2050Z) CONUS (2056Z) and M2 (2058Z). Details in the CWG meeting on 02/23/2022.
B09 striping and BDS update	03/10/2022	03/31/2022	Intermittent thin striping was seen in all products of B09 beginning on 3/10/2022 at 13:02Z. This was caused by unstable detector performance from row #290. The detector on this row was switched with a BDS map update on 3/31/2022 at 14:21Z which resolved the striping. See details in the CWG presentation on 03/16/2022.
B12 striping and BDS update	03/24/2022	04/05/2022	Intermittent and mild thin striping was seen in some products of B12 beginning on 3/24/2022 at 19:00Z. This was caused by unstable detector performance from row #110. The detector on this row was switched with a BDS map update on 4/5/2022 at 19:44Z which resolved the striping. See details in the CWG presentation on 03/30/2022.
B14 detector underperformance and BDS update	03/19/2022	04/07/2022	Mildly noisy detector performance was seen from B14 from row #50 beginning on 3/19/2022 at 04:00Z. Intermittent weak striping may be detected at this detector. The detector on this row was switched with a BDS map update on 4/7/2022 at 14:45Z which resolved the striping. See details in the CWG presentation on 03/30/2022.
B11 striping and BDS update	05/20/2022	06/02/2022	Mild intermittent striping was seen in the products of B11 beginning on 05/20/2022 at 15:06Z. This was caused by unstable detector performance from row #169. The detector on this row was switched with a BDS map update on 06/02/22 at 12:51Z which resolved the striping and it resumed nominal performance. See details in the CWG presentation on 06/10/2022.
B11 striping and BDS update	06/09/22	06/16/22	Intermittent striping was seen in the products of B11 beginning on 06/09/22 at 14:46Z due to anomalous performance from the detector on row #204. Striping was improved but still present after mitigation done 06/09/22 at 15:24Z. The detector on this row was switched with a BDS map update on 06/16/22 at 15:45Z which resolved the striping. See details in the CWG presentation on 06/17/2022.Keyword: RAD
Faint broad striping caused by lunar intrusion	06/08/2022	06/10/2022	Faint broad stripes present in select products due to lunar intrusion into the space look during their timelines. The contaminated spacelook observations occurred on 06/08 at 11:12Z impacting the B16 FD and M1 products; and on 06/10 at 12:49Z impacting the B08 FD and M1 products. Details in the CWG meeting on 07/08/2022.Keyword: RAD
B09 Striping caused by lunar intrusion	07/06/2022	07/06/2022	A strong stripe was present in a B09 FD due to lunar intrusion into the space look during the timeline. The single pixel stripe is caused by a known issue in the enhanced lunar rejection algorithm. The contaminated spacelook observation occurred on B09 at 09:44Z. Details in the CWG meeting on 09/02/2022.Keyword: RAD
Striping caused by lunar intrusion	07/17/2022	07/19/2022	Faint broad stripes present in select products due to lunar intrusion into the space look during their timelines. The contaminated spacelook observations occurred on 07/17 at 21:29Z impacting the B09 FD product; on 07/18 at 22:25Z impacting the B08 FD product; and on 07/19 at 23:02Z impacting the B09 FD product. Details in the CWG meeting on 09/02/2022.Keyword: RAD
Striping caused by lunar intrusion	08/15/2022	08/16/2022	Faint broad stripes present in select products due to lunar intrusion into the space look during their timelines. The contaminated spacelook observations occurred on 08/15 at 21:03Z impacting the B16 FD and M1 products; and on 08/16 at 21:31Z impacting the B08 FD product. Details in the CWG meeting on 09/16/2022.Keyword: RAD.
B10 striping and BDS update	09/24/2022	09/27/2022	Strong striping was seen in the products of B10 beginning on 09/24/22 due to anomalous performance from the detector on row #48 beginning at 11:37Z. This detector was filtered out of the L1b products from 09/24/22 at 22:49Z until 09/26/22 at 18:50Z. After this the detector caused striping and numerous missing swaths until it was resolved with a BDS map update. Additionally the detector on row #89 has been underperforming and has caused some very mild striping. The detectors on rows 48 and 89 were switched with a BDS map update on 09/27/22 at 18:35Z which resolved the striping. See details in the CWG presentation on 09/30/2022.Keyword: RAD
Elevated image navigation residuals	08/08/2022	08/08/2022	HCR reset at 12:00 UTC caused elevated navigation residuals in the North-South direction. Reported at the 08/12/2022 CWG meeting by Song Guo and Vladimir Kondratovich. Keyword: INR
Striping caused by lunar intrusion	09/10/2022	09/12/2022	Faint broad stripes and strong thin stripes were present in select products due to lunar intrusion into the space look during their timelines. The strong thin stripes were caused by a known issue in the enhanced lunar rejection algorithm. The contaminated spacelook observations occurred on 09/10 at 16:38Z impacting the B09 FD CONUS and M2 products with faint broad stripes; on 09/10 at 17:58Z impacting the B10 FD product with a strong thin stripe; on 09/11 at 18:50Z impacting the B08 B09 B13 and B14 products in all scenes with faint broad stripes in B09 B13 and strong thin stripes in B08 B14; and on 09/12 at 19:31Z impacting the B07 B08 B14 and B16 products with a strong thin stripe in B08 and faint broad stripes in B07 B14 and B16. Details in the CWG meeting on 10/21/2022.Keyword: RAD
Striping caused by lunar intrusion	10/09/2022	10/10/2022	Faint broad stripes and strong thin stripes were present in select products due to lunar intrusion into the space look during their timelines. The strong thin stripes were caused by a known issue in the enhanced lunar rejection algorithm. The contaminated spacelook observations occurred on 10/09 at 17:23Z impacting the B09 FD CONUS and M1 products with a strong thin stripe; and on 10/10 at 17:51Z impacting the B08 FD and M1 products with faint broad stripes. Details in the CWG meeting on 11/09/2022.Keyword: RAD
B11 striping and BDS update	12/31/2022	01/09/2023	Strong striping was seen in the products of B11 beginning on 12/31/2022 at 09:11Z due to anomalous performance from the detector on row #8. The detector on row 8 was switched with a BDS map update on 01/09/2023 at 15:36Z which resolved the striping. See details in the CWG presentation on 01/04/2023 and 01/11/2023. Keyword: RAD
B08 striping and BDS update	01/17/2023	02/10/2023	Mild intermittent striping was seen in the products of B08 beginning on 01/17/2023 at 18:26Z due to anomalous performance from the detector on row #16. The detector on row 16 was switched with a BDS map update on 02/30/2023 at 19:20Z which resolved the striping. See details in the CWG presentations on 02/08/2023 and 02/15/2023. Keyword: RAD
B10 striping and BDS update	02/04/2023	02/10/2023	Strong striping was seen in the products of B10 beginning on 02/04/2023 at 11:30Z due to anomalous performance from the detector on row #245. The striping was mitigated by operator actions though returned on 02/07. The detector on row 245 was switched with a BDS map update on 02/10/2023 at 19:20Z which resolved the striping. See details in the CWG presentations on 02/08/2023 and 02/15/2023. Keyword: RAD
Striping caused by lunar intrusion	02/08/2023	02/10/2023	Faint broad stripes and strong thin stripes were present in select products due to lunar intrusion into the space look during their timelines. The strong thin stripes were caused by a known issue in the enhanced lunar rejection algorithm. The contaminated spacelook observations occurred on 02/08 at 20:01Z impacting the B09 FD and CONUS products with a strong thin stripe; on 02/09 at 2009Z impacting the B08 products; and on 02/10 at 21:27Z impacting the B12 and B16 FD CONUS and M2 products with faint broad stripes. Details in the CWG meeting on 03/15/2023. Keyword: RAD
Striping caused by lunar intrusion	03/09/2023	03/10/2023	Faint broad stripes were present in select products due to lunar intrusion into the space look during their timeline. The contaminated spacelook observations occurred on 03/09 at 19:27Z impacting the B08 and B09 FD CONUS and M1 products; and on 03/10 at 1949Z impacting the B09 M2 product with faint broad stripes. Details in the CWG meeting on 03/15/2023. Keyword: RAD
Striping caused by lunar intrusion	04/03/2023	04/06/2023	Faint broad stripes were present in select products due to lunar intrusion into the space look during their timelines. The contaminated spacelook observations occurred on 04/03 at 1500Z impacting the B16 M1 products; on 04/04 at 1522Z impacting the B08 CONUS and M1 products; on 04/05 at 1726Z impacting the B09 FD CONUS M1 and M2 products; on 04/06 at 1659Z impacting the B12 M1 product; and on 04/06 at 1758Z impacting the B08 FD and M1 products. Details in the CWG meeting on 04/19/2023. Keyword: RAD
B11 striping and BDS update	04/08/2023	04/20/2023	Unstable detector performance was seen on the detector on row 156 of B11 beginning on 04/08 at 0534Z. The detector on row 156 was switched with a BDS map update on 04/20/2023 at 1633Z which resolved the striping. See details in the CWG presentation on 04/26/2023. Keyword: RAD
B10 striping and BDS update	05/01/23	05/04/23	Strong striping was seen in the products of B10 beginning on 05/01/23 at 2342Z due to anomalous performance from the detector on row #153. The striping was reduced by operator actions on 05/02/23 at 1102Z. The detector on row 153 was switched with a BDS map update on 05/04/23 at 1403Z which resolved the striping. See details in the CWG presentations on 05/03/23 and 05/10/23. Keyword: RAD
Frequent SPL NEdN outliers after DO.12.01 update	05/23/2023		Frequent SPL NEdN outliers were observed in certain bands on G16/G18 after the update of DO.12.01 on 05/23/2023. e.g. G16 B04/B06/B07/B09/B10/B13. The associated SPL mean value had a small fluctuation of a few counts compared to the normal condition. No apparent striping was observed. The CWG analysis shows that it is related to the failure of sample SPL spike screening after the update of DO.12.01 on 05/23/2023. The ground is working to resolve it. Details in the CWG meeting on 05/31/2023. Keyword: RAD
IR swaths loss due to consecutive SPL loss	10/26/2022		FD degradation with two consecutive swaths loss has been identified in the IR images since the issue was monitored in October 2022. This degradation is attributed to the consecutive SPL loss and is caused by a bug in the current operational algorithm. B07 has exhibited this issue more frequently compared to the other IR bands. Details in the CWG meetings on 01/25/2023 and 08/09/2023. Keyword: RAD

Event	StartDate	EndDate	Description
Detectors added to dead row list	12/20/2018	02/19/2019	The following detectors are added to the dead row list and skipped from l1b image generation: B8D91 B10D50 B10D149 B10D154 B11D35 B13D196 B15D333. This is a temporary method applied to reduce the strong striping at these IR bands.
Channels 8/10/11/12 striping	01/12/2019	01/18/2019	Striping due to elevated FPM temperature
G17 ABI Reset	1/3/2019	01/03/2019	G17 ABI was brought offline to implement a flight software update at ~1800UTC for two hours on 01/03/2019. GOES-17 ABI may experience degraded performance upon return to service while image navigation performance converges.
G17 ABI Mode6 test	12/27/2018	12/30/2018	Mode 6JKL timeline test
FPM peak temperature anomaly	11/25/2018	11/27/2018	Cryo-cooler reset tests during the "hot" FPM temperature periods on 11/25/2018-11/27/2018. Resulted in degraded IR imagery during these periods.
Mode 3G test run	11/15/2018	11/16/2018	Mode 3G test run (static spacelook); no FD L1B data during this period.
Detector map update	11/15/2018	11/15/2018	To improve the image navigation. Deployed at 18:48 UTC.
Kalman filter reset	11/15/2018	11/15/2018	Image navigation has temporarily degraded after KF reset at 18:32 UTC
B11 BDS update	11/14/2018		BDS for detector #203 updated
G17 drift to GOES-West	10/24/2018	11/13/2018	GOES-17 drifted from the test position (89.5W) to the GOES-West position (137.2W)
Data outage	10/23/2018	10/23/2018	L1B data outage between ~10:27 - ~13:02 UTC due to the flooding of sample outlier files (SOF) when scene saturated. The SOF clogged up the resampler and services crashed.
Detector map update	10/19/2018	10/19/2018	To improve the image navigation.
Visible star observation update	10/15/2018	10/15/2018	To improve precision of the star observation. Made in the framework of the ground processing upgrade.
Kalman filter parameter update	10/9/2018	10/9/2018	To improve convergence and stability of the filter. Translates to better image navigation.
Mode 3 timeline started	10/5/2018		Mode 3 started - Mode 6 ended.
Detector map update	10/4/2018	10/4/2018	To improve the image navigation. After update the Meso 1 and Meso 2 scans have used different detector maps for some time. The issue is under investigation.
Mode 6 started	10/2/2018	10/5/2018	Mode 6 started - Mode 4 ended.
Mode 4 started	10/1/2018	10/2/2018	Mode 4 started - Mode 6 ended.
Mode 6 started	9/26/2018	10/1/2018	Data distribution resumed with ABI in the Mode 6.
Yaw flip	9/24/2018		GOES-17 was conducted yaw-flip maneuver to inverted position.
Detector map update	9/20/2018	9/21/2018	To improve the image navigation.
Detector map update	9/13/2018	9/13/2018	To remove 3-pixel bias to the South in the LWIR channels. Deployed at 12:55 UTC.
BDS upload for IR bands	9/12/2018		BDS updates for large NEdT IR detectors.
Star detection parameter update	9/7/2018	9/7/2018	To improve the image navigation and stability. Deployed at 17:07 UTC.
Mode 3C implementation	9/5/2018		Mode 3C was deployed at 19:00 UTC. Results of the second and third blackbody calibrations only used for CONUS and MESO images.
Line Of Sight stability improvement	8/30/2018	8/30/2018	To improve the image navigation stability.
Band02 is ~9% brighter than SNPP/VIIRS	8/28/2018		G17 ABI B02 radiance is ~9% brighter than collocated SNPP VIIRS measurements.
PICA	8/28/2018		some of G17 ABI IR bands experience swath-to-swath meso-to-meso and CONUS-to-CONUS calibration variations
Star observation angle correction	8/9/2018	8/9/2018	To increase the number of observed stars.
Star observation angle correction	7/9/2018	7/9/2018	To enable IR star observation. That allowed to compensate for VNIR - MWIR offset. LWIR offset remained not fully compensated.
Mode 3 with extra stars started	7/5/2018	7/6/2018	Extra star observations increase stability of the image navigation.
Mode 3 started	7/2/2018	9/5/2018	Line Of Sight correction has enabled the start of the Mode 3 timeline.
Line of Sight correction	7/2/2018	7/2/2018	The correction has removed static offsets in the ABI pointing.
Yaw flip maneuver to original position	6/20/2018	6/20/2018	Performed between 17 and 19 UTC.
First Light Image	5/20/2018	5/20/2018	First Light image released.
Yaw flip maneuver to inverted position	5/16/2018	5/16/2018	Performed between 17 and 19 UTC.
Occurrence of "artificial" striping for the VNIR bands after DO7	10/15/2018	10/24/2018	Performed during this period; disappeared after drift.
Inaccurate GS solar gains on 10/18 and 11/24	10/18/2018	11/24/2018	Sudden gain drop in Band04.
Sudden change of solar cal gains at not-solar-calibration event time	11/14/2018	11/24/2018	Impact unknown on L1B images
Large oscillation of B02/B03 solar cal gains	8/30/2018	10/18/2018	Possible due to SD BRDF uncertainty.
VNIR bands incorrect gain	01/18/2019	01/19/2019	Incorrect VNIR bands gain began at 15:00UTC on 01/18/2019 and ended at 3:00UTC on 01/19/2019 after the solar calibration on 01/19/2019.
ABI hard reset	11/20/2018	11/21/2018	Began at 20:30 UTC and ended at 2:00 next day. Caused by the cryocooler anomaly. Large calibration and navigation anomalies afterward were caused by the need to reload various LUTs.
Crycoler anomaly	11/20/2018		Anomaly with the crycooler started around 10:15 UTC until the reset at 20:30 UTC
Crycooler anomaly	11/25/2018		Anomaly with the crycoller around 14:00 UTC; associated ABI reset also caused a range of calibration and navigation anomalies.
Mode 6F test run	11/27/2018	11/30/2018	Navigation is in family with the previous versions of Mode 6.
B09 BDS update	12/10/2018		Det#2:Column6->4. Det#52:Column6->1. Det#127:Column6->1
Simultaneous Mode 4 run on GOES-16 and GOES-17	12/04/2018	12/04/2018	Ran from 18 to 22 UTC; PDA output had some data gaps.
Mode 6J 24-hour test run	12/27/2018	12/28/2018	Run from 8 to 8 UTC. Navigation of visible and IR channels is in family with the previous versions of Mode 6. Time schedule appeared to be shorter than expected.
Mode 6L 24-hour test run	12/28/2018	12/29/2018	Run from 8 to 8 UTC. Navigation of visible channels is in family with the previous versions of Mode 6. Navigation of IR channels was broken.
Mode 6K 24-hour test run	12/29/2018	12/30/2018	Run from 8 to 8 UTC. Navigation of visible channels is in family with the previous versions of Mode 6. Navigation of IR channels was broken.
STAR SCDR outage	1/5/2019	1/7/2019	STAR SCDR did not accept G16/G17 data from PDA. The gap was later backfilled. Some backfill data were taken from GRB distribution. It was earlier noted by AWG that some GRB data may cause problems in L2 processing.
Mode 6M 48-hour test run	1/28/2019	1/30/2019	Run from 13 to 13 UTC; CWG evaluation of radiometric and geometric calibration is positive.
DO.07 has a code bug in implemetation of CDRL 80 Rev F	10/15/2018	04/08/2019	In equation 6.5-1 integration factor was erroneously divided twice during the Q-scaling in DO.07.( WR5407/WR6348).
GOES-17 operational declaration as GOES-West	02/12/2019		GOES-17 is officially declared as the GOES-West satellite at 137.2 degrees west.
Initial gainset switch time	7/26/2018	10/24/2018	Gainset switch time set at the beginning of the PLT/PLPT period. Gainset 1->3: 0600 UTC. Gainset 3->1: 1500 UTC.
Gainset swith time after the satellite drift	11/13/2018	12/06/2018	Gainset 1->3: 0900 UTC. Gainset 3->1: 1900 UTC.
Gainset 3 turned on	1/18/2019		Gainset 1->3: 0830UTC and gainset 3->1: 1930UTC.
Gainset 3 turned off	12/06/2018	1/18/2019	Gainset 3 was turned off during this period.
Gainset switch time	11/30/2018	12/06/2018	Gainset 1->3: from 0900 UTC to 0830 UTC. Gainset 3->1: from 1900 UTC to 1930 UTC
Mode 6 72-hour test run	2/19/2019	2/22/2019	Version 6M was run from 15 to 15 UTC.
Mode 6 56-hour test run	2/25/2019	2/27/2019	Version 6M was run from 14 to 22 UTC.
G17 B04 and B06 GS gain decreasing	8/02/2018	8/27/2018	G17 B04 and B06 solar calibration gain values became abnormally decreasing.Resulting in dark trending of L1B radiance during this period(ADR754).
G17 B04 and B06 GS gain decreasing	12/26/2018	2/25/2019	G17 B04 and B06 solar cal gains displayed abnormal decreasing trending again. It resulted in dark trending of L1B radiance at these two channels. The previous event was in August 2018. ADR 754 and ADR 909.
G17 Mode 6 test run	03/19/2019	03/22/2019	Version 6M was run from 14:00 to 14:00 UTC.
G17 IR bands gain set3 turn off	03/16/2019		G17 IR bands gain set3 turn off.
G17 BDS updates and DRL for selected IR detectors	03/22/2019	03/22/2019	G17 BDS map was updated for the following detectors to reduce striping and noise: B8D91 / B9D92 / B10D50 / B10D175 / B11D35 / B11D49 / B11D216 / B11D300 / B12D45 / B12D133 / B12D198 / B12D202 / B12D290 / B12D293 / B13D196 / B15D333 and 137. DRL was implemented for B16 Det#28
G17 B10 detector 231 saturation	03/21/2019	04/01/2019	The detector saturated and caused serious striping in L1b images. The striping was mitigated by manual memory flush executed at ~14z on 2019-03-22. The BDS map of the detector is updated on 04/01/2019 to resolve the anomaly.
G17 IR bands gain set III turned back on	03/28/2019		G17 IR bands gain set III was turned back on. Now the instrument is operated at the interleaved gain set I/III setting. Gainset I to III is switched at 0900UTC and Gainset III to I at 1900UTC.
G17 Yaw Flip	03/27/2019	03/27/2019	GOES-17 Yaw Flip accomplished on March 27 2019 2035-2159 UT; ABI data outages - incomplete last pre-flip images; few empty frames. Image navigation is good for all post-flip images.
G17 Transition to Mode 6	04/02/2019		New baseline Mode 6M is started at 16:00 UTC ; it replaced Mode 3C; link: https://www.ospo.noaa.gov/Operations/GOES/west/GOES-17_Scan_Mode_6.html.
G17 VNIR gain change with RevG algorithm	04/08/2019		G17 VNIR bands gains changed with the implementation of CDRL-80 RevG algorithm (DO.07.02) using the 04/02 solar cal data.
Abnormal G17 VNIR gains since the solar calibration event on April 12 2019	04/12/2019		G17 VNIR B04 and 06 experienced unexpected large drops of the operational solar cal gain values after the solar calibration event on 04/12/2019. Compared to the solar cal. gains on 04/08/2019 (DO.07.02) which were calculated based on the solar event on 04/02/2019. B04 dropped by 9.2%/B05 by 1.4%/B06 by 5.6%. All the changes were more than expected.
CPAF update	04/18/2019	04/18/2019	Band 7 resampler update at 18:32 UTC to correct the cold pixels around fire (CPAF).
G17 B02 bias correction	04/27/2019		G17 B02 bias correction was applied in GS at 15:40UTC on 04/27/2019 to reduce the radiance by about 6.9%. RevG algorithm was also implemented to cause the gain changes at B04-B06.
G17 Navigation anomaly	04/23/2019	4/23/2019	Anomalous navigation shifts were observed by CWG in the full disk image at 15:10 UTC for all channels. The images are shifted in both North-South and East-West directions. The largest shifts are in the EW direction of VNIR channels and amount up to 15 urad. The CONUS and MESO images produced in the period 15:10 to 15:20 may also be affected.
Kalman filter reset	04/27/2019	04/27/2019	Kalman filter reset after 13 UTC caused slightly elevated navigation residuals and ABI data gap from 1:30 to 3:20 UTC.
G17 Solar cal lunar intrusion rejection LUT update	05/05/2019	05/05/2019	Reduced striping or corrected bias at the G17 VNIR bands due to the update of solar spacelook count lunar intrusion rejection LUTs.
G17 Periodic striping for B11	04/23/2019	05/03/2019	Serious striping between 1900 - 0900 UTC daily caused by a detector (D241) saturation during Gain Set I. The detector was replaced at 1500 UTC on 05-03-2019.
Navigation anomaly	05/04/2019	05/04/2019	Anomalous navigation shifts and image loss were observed by CWG in the full disk image from 13:00 to 14:00 UTC for all channels. The images are shifted in both North-South and East-West directions. The largest shifts are in the EW direction of VNIR channels and amount up to 30 urad. The CONUS and MESO images produced in that period may also be affected.
Navigation anomaly	05/05/2019	05/05/2019	CWG has observed relatively-elevated EW navigation shift of up to 5 urad in WNIR channel full-disk images at 15:10 UTC. CONUS and MESO images collected from 15:10 to 15:20 UTC may also be affected.
Update the Kalman filter control LUTs	05/10/2019	05/10/2019	Deployed at 15:29 UTC this update is a temporary fix for the anomaly reported by ADR 955. This temporary fix will resolve the periodic Kalman filter issues that have been seen in the recent weeks and reported in ADR 955. The fix will be removed when the full fix is delivered in DO 09.
Gainset III removal	05/28/2019	07/15/2019	The daily gainset I and gainset III swap stopped on 05/28/2019.
North-South striping in GOES-17 Channel 2 image	05/31/2019		Multiple stripes along the north-south direction are found around 1830 - 1840 UTC since May 31 2019 (when clear). The stripes are centered at a solar farm in southern Calibration (35:20N/120:04W) and extend throughout one swath. They may persist until mid July.
Large image navigation errors	07/10/2019	07/10/2019	ABI images taken around 15:20 and 15:30 UTC may have large navigation errors due to the Kalman filter reset caused by the scheduled HBT flush.
Gainset III resume	07/16/2019		G17 IR bands gainset III daily turned on at 09:00Z; switched to gainset I at 19:00Z.
Sporadic missing data with DQF=-1 in CONUS/FD images	06/22/2019	06/22/2019	Missing data (radiance = 4095)with DQF=-1 was found in the CONUS/FD images at various bands and time that day. Similar incidents probably happened before.
Major GS upgrade to DO.08.00.02	07/25/2019		including the corrections of several issues concerning L1b products and the implementation of Predictive Calibration to improve GOES-17 Channel 8-16 calibration when the FPM temperature becomes unstable.
G17 ABI FD data gap	08/14/2019	08/14/2019	Data gap from 2019-08-14 0640 UTC to 2019-08-14 0830 UTC is caused by East-West encoder error or anomaly. It was resumed back to normal with the standard procedures.
G17 ABI FD data gap	08/15/2019	08/15/2019	Data gap from 2019-08-15 0540 UTC to 2019-08-15 1630 UTC is caused by encoder error or anomaly. It was resumed back to normal after parking the ABI sensor.
G17 ABI scanner calibration	08/16/2019	08/16/2019	ABI data outage from 2019-08-16 22:30 UTC to 2019-08-16 23:00 UTC due to the scanner calibration.
G17 ABI scanner calibration	08/17/2019	08/17/2019	ABI data outage from 2019-08-17 00:00 UTC to 2019-08-17 00:30 UTC due to the scanner verification.
G17 ABI navigation anomaly	07/31/2019	07/31/2019	Navigation shift is detected by CENRAIS in the full-disk image of 22:50 UTC in the EW and NS directions for all channels. In the channel 2 image the shift is about 8 microradians in the East direction and 15 microradians in the North direction. Similar shifts may be present in the other imagery taken between 22:50 and 23:00 UTC.
G17 band 11 striping	08/17/2019	09/09/2019	Channel 11 detector #49 (0-based index) spacelook count was unstable since 19:00z on 2019-08-17 and detector #305 was saturated since 02:15z on 2019-08-22. Both caused stripes in the Ch11 L1b image. The BDS of detector #49 was updated on 08/27 at 10:23z and the BDS of detector #305 was updated on 09/09 at 15:21z to remove the stripes.
Streaks at B02/B07/B16 images	06/27/2019	06/27/2019	Streaks can be observed at the G17 B02/B07/B16 FD/CONUS/MESO images collected at 05:12Z on 06/27/2019 due to the lunar intrusion in the spacelook.
G17 IR bands gain set3 turn off	09/10/2019		G17 IR bands gain set 3 is turned off.
G17 Yaw Flip	09/09/2019	09/09/2019	Yaw flip was carried out between 20:40 and 21:39 UTC. No data were provided during that period. Image navigation and data integrity after the flip are nominal.
Streaks at B02/B07/B10/B15	09/15/2019	09/15/2019	Streaks at the G17 B02/B07/B10/B15 FD/CONUS/MES images collected at 23:06 - 23:10Z.
G17 ABI image gap	09/20/2019	09/20/2019	17:20 and 17:30 UTC FD images are missing and 17:40 UTC FD images are partial for all channels. The data gap is caused by trial of antenna swap at NSOF. Only PDA output of FD and other images is affected
pCal on/off update	10/06/2019		The pCal is turned on at ~8:40z and off at ~19:20z so that the pCal on/off time will not collide with the gain set switch time at 08:30z and 19:30z.
G17 ABI TDQF LUT update	10/02/2019	10/02/2019	The G17 ABI Temperature Data Quality Flags (TDQF) thresholds for the IR bands were updated to flag the saturated data more effectively.
G17 ABI degraded images	10/01/2019	10/01/2019	ABI images dated from 13:39 to 22:30 UTC may be degraded due to the work on star tracker. Anomaly has impacted swath collection and alignment. Images may have missing blocks. Navigation errors are elevated at the start and the end of the period.
G17 IR bands gain set III resumed	10/06/2019		G17 IR bands gain set III was turned back on 10/06/2019. Now the instrument is operated at the interleaved gain set I/III setting. Gainset I to III is switched at 0830UTC and Gainset III to I at 1930UTC.
G17 cooling test I	10/15/2019	10/15/2019	The first phase test for the ABI 30 minute cooling timeline was conducted between 11:00 - 12:00 UTC. Only two Mode 4 timeline images were disseminated during this one hour. Some Band 2 data were missing.
Gain Optimization Test I	10/15/2019	10/15/2019	The gain adjustment test was conducted for B13/B14 during the Phase I cooling test period at approximately 11UTC-12UTC. The L1b images were severely damaged because the cooling test was executed concurrently. No noticeable impact in L1b was observed after 12 UTC.
G17 Cooling Test - Phase II	10/18/2019	10/21/2019	The second phase test for the ABI 30 minute cooling timeline was conducted between 0600 - 1200 UTC on 10/18/2019 - 10/21/2019. Only one Mode 4 timeline images were disseminated at every 30 minutes during these cooling test periods.
Gain Optimization Test II	10/18/2019	10/21/2019	The detector gains are adjusted for Bands 13 & 14 during the gain-set III period of 08:30 UTC - 19:30 UTC on 10/18/2019 - 10/21/2019. The adjustment adds the data availability for band 13 and reduces the noise for band 14.
Gain Optimization Test III	11/05/2019	11/06/2019	The detector gains are adjusted for Bands 13 & 14 during the gain-set III period of 08:30 UTC - 19:30 UTC on 11/05/2019 - 11/06/2019. Serious striping may be observed in Band 13 L1b images from 19:30 UTC to 19:35 UTC on 11/05/2019 and 11/06/2019 caused by the latched spacelook counts which were triggered by this gain optimization test.
Gain Optimization Test IV	11/07/2019	11/08/2019	The detector gains are adjusted for Band 14 during the gain-set period of 08:30 UTC - 19:30 UTC.
G17 B02 Q LUT Update	11/18/2019	11/18/2019	GOES-17 ABI B02 calibration quadratic term (Q) was updated with the CDRL-079 Rev T. This update only changed the Q values for some BDS detectors from Column 2. Users may not detect the change in the L1B data.
ABI scanner calibration 1	11/13/2019	11/13/2019	Due to the ABI scanner calibration the ABI L1b data were missing from 22:40 to 23:10 UTC.
ABI scanner calibration 2	11/14/2019	11/14/2019	Due to the ABI scanner calibration the ABI L1b data were missing from 00:00 to 00:20 UTC.
Streaks caused by lunar intrusion in space-looks	12/20/2019	12/20/2019	Streaks exist in the 04:40Z timeline L1b images for bands 10 and 10 that lasts 5 minutes and for bands 5-6 and 11-12 within one FD and one MESO scans. Both are caused by lunar intrusion into space-looks.
G17 IR bands gain set3 turn off	12/15/2019	12/15/2019	G17 IR bands gain set 3 is turned off.
G17 IR bands gain set3 turn on	12/19/2019	12/19/2019	G17 IR bands gain set 3 is turned on at 08:30 UTC.
Bands 12-16 anomalous images	12/31/2019	12/31/2019	The images of bands 12-16 of the first half of 19:30Z timeline are anomalous because the detector gain calculation is incorrect.
B09 BDS update	01/09/2020	01/09/2020	B09 Det#36 (indexing from 0) BDS was updated at 17:31 UTC on 01/09/2020. This is aimed to resolve the intermittent striping caused by the unstable detector responsivity starting on 01/06/2020.
B10 BDS update	02/07/2020	02/07/2020	B10 Det#297 (indexing from 0) BDS was updated at ~18:23Z on 02/07/2020 to resolve the moderate striping caused by the unstable detector responsibility starting on 02/03/2020.
G17 ABI Cooling Timeline Engineering Test	02/19/2020	02/19/2020	GOES-17 ABI experienced two hours (1800-2000 UTC) of a cooling timeline engineering test using the "Flex Mode 3" on these two days.
Mode 3 cooling timeline implementation	02/26/2020	03/01/2020	The Mode 3 cooling timeline ("Flex Mode 3") was implemented for 6 hours from 0600 UTC to 1200 UTC from Feb 26
pCal anomaly	03/03/2020	03/05/2020	(1) The predictive calibration (pCal) algorithm for GOES-17 ABI bands 8-16 was not turned on during the unstable IR FPM temperature time on March 3-4 2020 resulting in relatively large radiometric calibration uncertainty for the data of these bands collected during this period; (2) the pCal algorithm was incorrectly implemented and collided with the gain-set switch events at 19:30 UTC on March 4 and 08:30 UTC on March 5 resulting in degraded images of bands 8-16 at 19:30-19:40UTC on March 4 and 08:30-08:40 UTC on March 5.
B11 BDS update	03/10/2020	03/10/2020	G17 Band11 Detector#081 BDS was updated at ~16:58 UTC on March 10 2020 to resolve an intermitent striping starting since late February 2020.
Real-time op. instr. cal files outage	02/23/2020		The real-time operational instrument calibration files are not available via PDA.
Gainset switch turn-off	03/18/2020	03/24/2020	The gainset switch was disabled at 08:30 UTC on 03/18/2020. It turned back on 03/25/2020.
G17 HBT flush	03/10/2020	03/10/2020	GOES-17 HBT flush was performed from 15:10 to 15:40 UTC
G17 Yaw-flip	04/06/2020	04/06/2020	G17 yaw flip was carried out on 04/06/2020. Data outage via PDA was observed between 20:40-21:33UTC. Blank or partial images can be observed during that period. Image navigation is nominal and the pixel quality flag is correct after the flip. More details in CWG presentations by T. Schmit and S. Guo on 2020-04-08.
Change in the Gainset Switch Time	04/07/2020	05/31/2020	The Gain Set III has been in use between 0900-1900 UTC since 7 April 2020
G17 B12 Det159 Anomaly	04/13/2020	04/16/2020	G17 B12 Det#159 became saturated at ~16:25Z on 04/13/2020; causing strong striping at the B12 images. The striping was reduced at ~17:54Z on 04/14/2020 by a change in the resampling processing. The BDS update occurred at ~16:56Z on 04/16/2020 to resolve the anomaly. Details in the OSPO notification Issued on Apr 14/2020 1840Z and the CWG meeting reports on April 15 and April 22/ 2020.
pCal update	04/28/2020		The pCal control was updated with ADR1001 Case10 on April 28/2020. It is scheduled to function till August 2020
Mode 3 Cooling Timeline	04/09/2020	05/01/2020	The Mode 3 cooling timeline ("Flex Mode 3") was implemented to extend the valid ABI data by reducing the peak IR FPM temperature. It was executed from 0600-1200 UTC on 04/09/2020 - 04/24/2020; from 0600-1130 UTC on 04/25/2020; and from 0600 - 1200 UTC on 04/26/2020 to 05/01/2020. Details in the OSPO notification issued on 04/06/2020 at 1310Z and the reports in the CWG meeting on 04/29/2020 and 05/06/2020.
B09 Det193 Anomaly	05/17/2020	05/21/2020	G17 B09 Det#193 became unstable at ~14:00Z on 05/17/2020 and resulted in striping images since then. The striping issue was resolved with the BDS update at ~15:24Z on 05/21/2020. Details on the reports in the CWG meeting on 05/27/2020.
GOES-17 INR anomaly	05/04/2020	05/04/2020	Large East-West and North-South image navigation errors in the 13:00 to 13:30 UTC FD images for reflective channels (other formats may also be affected) due to reset of the Kalman filter. Channel errors are up to 12 urad. Details are in the presentation by S. Guo and V. Kondratovich at the 2020-05-27 CWG meeting.
Gainset I Only	06/01/2020	06/02/2020	The gainset III was turned off
Gainset III turn-on	06/03/2020	06/06/2020	The gainset III calibration configuration was turned on during these four days.
Gainset III turn-off	06/07/2020		Only the gainset I calibration configuration was applied
G17 B09 Det028 Anomaly	05/31/2020	06/04/2020	G17 B09 Det028 became unstable at ~10:09Z on 05/31/2020 resulting in intermittent striping. The striping issue was resolved with the BDS update on 06/04/2020. Details reported in the CWG meetings on 06/03/2020 and 06/10/2020.
G17 B11 Det300 Anomaly	06/03/2020	06/04/2020	Saturation response occurred at ~19:00Z on 06/03/2020. The strong striping was reduced with the manual trigger of the "band-aid" algorithm. A BDS update was implemented on 06/04/2020 to replace the anomalous detector. Details reported in the CWG meeting on 06/10/2020.
Gainset III resume	07/03/2020		Gainset switch returned on 07/03/2020.
B08 BDS update	07/06/2020	07/06/2020	The BDS of G17 B08 Det#84 was updated on 07/06/2020 at ~20:20:00 UTC. This is to resolve the striping caused by unstable detector responsivity since 06/29/2020. Details are in the presentation by Paul Douglas at the 2020-07-08 CWG meeting.
GOES-17 INR anomaly	06/22/2020	06/22/2020	Large East-West IR image navigation errors (up to 30 urad) at 19:30 UTC were detected by CWG in PDA output. Details are in the presentation by S. Guo and V. Kondratovich at the 2020-06-30 CWG meeting.
GOES-17 ABI Data Loss	07/01/2020	07/01/2020	ABI data from 16:50 to 17:10 UTC were lost because of the signal reception problem. Image navigation is strongly affected between 17:10 and 17:20
GOES-17 ABI INR Anomaly	07/04/2020	07/04/2020	Large navigation errors (up to 8 urad) in reflective channels at 14:30 UTC. Details are in the presentation by S. Guo and V. Kondratovich at the 2020-07-08 CWG meeting.
Banding and Striping Images	07/12/2020	07/12/2020	The Moon appeared in the G17 ICT spacelook positions at ~03:15z and ~03:20z. These intrusions caused the strong bandings at the B09 and B13 images between 03:15-03:20z and at the B10 and B15 images between 03:20z - 03:25z. One strong banding can also be observed at the B04 FD swath and the MESO image at ~03:15z. The strong striping at the B13 images since 03:20z was caused by the latched spacelook and was resolved by the manual reset of the spacelook at ~04:14z. Details on these anomalies are available in the report by Yu et al. in the CWG weekly meeting on 07/15/2020.
B11 stripings	08/06/2020	08/21/2020	The G17 B11 images experienced an intermittent striping between ~12:51 UTC on 08/06/2020 and ~21:02 UTC on 08/18/2020 and a strong striping between ~21:02 UTC and ~23:55 UTC on 08/18/2020. The intermittent striping was caused by the unstable detector at the detector row #213 and it was resolved by a BDS update at ~21:02 UTC on 08/18/2020. The strong striping caused an inadvertent BDS update at Row#300 at ~21:02z; and mitigated with a manual spacelook reset at ~23:55z on 08/18/2020 to trigger the band-aid remedy; and recovered with the reverted BDS update at ~18:28 UTC on 08/21/2020. Details in the reports at the CWG 08/19/2020 meeting.
B08 striping and BDS update	08/15/2020	08/24/2020	G17 B08 experienced an intermittent striping starting at ~22:42 UTC on 08/15/2020. The issue was resolved with the BDS update for the detector at Row#198 at ~17:30 UTC on 08/24/2020.
Cooling timeline implementation	08/11/2020	09/01/2020	he Mode3 cooling timeline was implemented between 06:00 - 12:00 UTC everyday from 08/11/2020 to 09/01/2020. This timeline is aimed to gain more valid earth scenes around the satellite midnight by reducing the FPM temperature in the warm time of the day in the eclipse season. When this cooling timeline is executed only one FD and 15 MESO images are collected in each timeline. Details can be found in the CWG meeting presentations on 09/02/2020.
Gainset switch time update	09/09/2020		The gainset switch times are changed from 09:00z/19:00z to 08:30z/19:30z
GOES-17 Yaw Flip	09/08/2020	09/08/2020	G17 Yaw Flip was performed between 20:40-21:39 UTC (no image in this period). All images before and after the yaw flip are nominal. No impact on INR. Details are in the presentation by S. Guo and V. Kondratovich at the 2020-09-09 CWG meeting.
Gainset I only	09/13/2020	10/02/2020	Gainset I only during this period. Validation reported in CWG meetings on 09/16/2020 and 10/07/2020.
B10 striping & BDS update	09/25/2020	09/30/2020	G17 B10 images experienced weak to moderate striping since 09/25/2020 due the unstable responsivity and elevated noise at Det#175. The issue was resolved with the BDS update on 09/30/2020. Detailed information is available at the report in the CWG meeting on 09/30/2020.
Gainset III not switched on	10/11/2020	10/11/2020	The Gainset III was not turned on this day.It caused unexpected striping or even invalid images at some IR bands near the satellite midnight time. Details available at the CWG meeting on 10/14/2020.
Cooling Operation	10/14/2020	10/31/2020	The operational cooling timeline was implemented between 06:00-12:00 UTC everyday from 10/14/2020 to 10/31/2020. This cooling operation is aimed to gain more valid earth scenes around the satellite midnight time. More details are available in the report in the CWG meeting on 11/04/2020.
Corrupted IR images at 8:30 UTC	11/06/2020	11/10/2020	Corrupted (degraded) B08-B16 images can be observed at 08:30 - 08:40Z from 11/06/2020-11/10/2020. This was due to the collision of the pCal algorithm with the gainset switch. The anomaly was corrected on 11/11/2020 with the update of pCal LUT. Details can be found at the ABI status report in the CWG meeting on 11/18/2020.
ABI Encoder Calibration	11/17/2020	11/17/2020	ABI Encoder Calibration was performed between 22:30-23:00 UTC. No images were produced during the period. No impact to the INR after the period.
ABI Encoder Calibration	11/18/2020	11/18/2020	ABI Encoder Calibration was performed between 00:00-00:30 UTC. No images were produced during the period. No impact to the INR after the period.
Calibration Variation at ~09:00Z	11/11/2020	11/25/2020	A small calibration variation (<~0.4K) can be observed at several G17 IR bands around 09:10 - 09:30Z from 11/11/2020 - 11/25/2020. It was caused by a later turn-on of the pCal algorithm with pCal LUT Case11. The issue was resolved with the deployment of a typo corrected LUT on November 25. More details in the CWG meeting on 12/02/2020.
stripes at B08 B11 and B12	01/06/2021	01/06/2021	Stripes can be observed at the B11 and B12 images from ~03:40 - ~03:50 UTC and the B08 images from ~03:45-03:50 UTC on 01/06/2021. The anomaly was caused by the lunar intrusion into the ICT spacelook observations for some detectors of these three bands. Reference can be found at the CWG meeting on 01/06/2021.
B09 striping and BDS update	01/24/2021	01/29/2021	G17 B09 experienced strong striping related to a saturated detector from ~22:30 UTC to ~23:55 UTC on 01/24/2021 and 15:40 - 15:45 UTC on 01/29/2021. The striping was mitigated by manually forcing the detector observations to skip the resampling algorithm at ~23:55 UTC on 01/24/2021 and was then resolved with the BDS update at ~15:40 UTC on 01/29/2021. Strong striping could be observed from 15:40-15:45UTC after the BDS update and then disappeared after 15:45 UTC. More details available in the CWG meeting slides presented on 02/03/2021.
Cooling operation	02/06/2021	02/28/2021	The flexible M3 cooling timeline was applied from 06:00-12:00Z every day between 02/06/2021 and 02/28/2021. The cooling timeline was used to reduce the IR FPM temperature at night time and thus gained some valid images in the otherwise saturation period.
Calibration Anomaly at 09:00-10:00Z	02/27/2021	03/03/2021	Abnormal calibration variation was observed at some G17 IR channels at ~9-10Z from 02/27/2021 to 03/03/2021. The anomaly was associated with the small bump of G17 focal plane module (FPM) temperature during this time period with the maximum magnitude occurred on Mar. 1
G17 calibration anomaly at Bands 08-16	03/08/2021	03/08/2021	The pCal algorithm was not deployed on 03/08/2021 and this led to large radiometric calibration error for Bands 08-16 during the satellite night time when the focal plane module temperature was floating. The pCal algorithm was resumed on 03/09/2021. Details in the CWG meeting reports on 03/10/2021.
Corrupted images caused by GSS and pCal collision	03/31/2021	03/31/2021	The images of Ch08-16 collected at 19:30-19:35 UTC were corrupted due to the pCal and gainset switch collision.
Stripes caused by Lunar Intrusions	03/28/2021	03/28/2021	Stripes can be observed in the images of some G17 channels collected at 20:30-20:50UTC and 22:10-22:20 UTC. These stripes are caused by the lunar intrusions into the spacelook positions. More information was available in the CWG meeting on 03/31/2021 and 04/07/2021.
VNIR channel gains update via BYOG	04/05/2021	04/05/2021	GOES-17 VNIR channel gains were implemented into operation via Bright-Your-Own-Gain (BYOG) at 17:31 UTC on 5 April 2021. It was about 10 days after the scheduled solar calibration event conducted on 03/26/2021. The effort was to minimize the impact of abnormal PG solar calibration processing. Detailed information can be found in the CWG meeting on 03/31/2021 and 04/07/2021.
B12 Striping & BDS update	04/02/2021	04/08/2021	G17 B12 experienced intermittent striping due to the underperformance of Det#56 since 04/02/2021. This issue was resolved with the BDS update on 04/08/2021. Details available at CWG meeting on 04/07/2021 and 04/14/2021.
B08 Striping and BDS update	12/12/2020	05/14/2021	Intermittent striping appeared in the G17 B08 images around mid-December 2020 and disappeared on 05/14/2021 after the BDS update for Det#165. Details in the CWG presentations on 05/12/2021 and 05/19/2021.
B12 Striping and BDS update	05/04/2021	05/14/2021	Striping appeared in the G17 B12 images on 05/04/2021. It disappeared on 05/14/2021 after the BDS update for Det#207. Details in the CWG presentations on 05/12/2021 and 05/19/2021.
B13 BDS update	6/11/2021	6/11/2021	The BDS of B13 Detector row #280 was updated at ~16:05 UTC on 06/11/2021 to improve the image quality associated with the elevated noise of this detector since 05/29/2021. Details in the CWG presentations on 06/02/2021 and 06/16/2021.
ABI image sequential anomaly	05/29/2021	05/29/2021	ABI L1b all channel images were not distributed between 20:59-21:35 UTC. Blank FD images were distributed at 21:30. Refer to ESPC Notification and S. Guo and V. Kondratovich CWG meeting presentation on 6/02/2021.
B12 striping and BDS update	06/24/2021	07/02/2021	The images of B12 displayed striping caused by the elevated noise of Det#313 since 06/24/2021. The issue was improved with the BDS map update on 07/02/2021. Details are available in the CWG presentations on 06/30/2021 and 07/07/2021.
Broad striping by lunar intrusion	07/01/2021	07/01/2021	Broad striping can be observed in the B05/B10/B11/B12 images at ~03:27 UTC on 07/01/2021. It was caused by a lunar intrusion into the spacelook scene. Detailed information is available in the CWG presentation on 07/07/2021.
Satellite Anomaly and ABI reset	07/09/2021	07/09/2021	GOES-17 satellite experienced an anomaly on 07/09/2021 in resulting in a data outage from 06:48 - 12:20 UTC. The ABI instrument was reset during this period. Details are available in the CWG presentations on 07/14/2021.
B12 striping and the BDS map restoration	07/09/2021	07/12/2021	B12 images showed striping after the instrument reset on 07/09/2021. The issue was resolved with the restoration of the B12 BDS map for Det#313 on 07/12/2021. Details are available in the CWG presentations on 07/14/2021.
B09 Transient Striping	07/12/2021	07/12/2021	B09 images showed a transient striping at ~16:39Z. Details are available in the CWG presentations on 07/14/2021.
Satellite Anomaly and ABI Reset	07/22/2021	07/23/2021	G17 satellite entered into the safehold mode at ~05:37Z on 07/22/2021. ABI was reset and the L1b data was recovered via PDA at ~12:40Z on 07/23/2021. Impacts of this reset on the L1b data are available in the CWG meeting slides on 07/28/2021.
Broad striping by lunar intrusion	07/30/2021	07/30/2021	Broad striping can be observed in the B05/B10/B15 images at ~02:40 UTC on 07/30/2021. It was caused by a lunar intrusion into the spacelook scene. Detailed information is available in the CWG presentation on 08/04/2021.
Broad striping in FD images by lunar intrusion	07/31/2021	07/31/2021	Broad striping can be observed in FD only in the B04/B09/B13 images at ~03:00 UTC on 07/31/2021. It was caused by a lunar intrusion into the spacelook scene. Their MESO/CONUS images were normal. The B03 spacelook was slightly contaminated and the striping signal is weak and not visible. Detailed information is available in the CWG presentation on 08/04/2021.
Broad striping by lunar intrusion	07/28/2021	07/28/2021	Broad striping can be observed in the B03/B08/B09/B13/B14 FD images at 01:00 UTC (CONUS at 01:006 UTC)(MESO2 at 01:08UTC) on 07/28/2021. It was caused by a lunar intrusion into the spacelook scene. Detailed information is available in the CWG presentation on 08/04/2021.
G17 IR Calibration Anomaly	08/06/2021	08/06/2021	G17 ABI experienced a series of anomalies in the images collected at ~09:00 - 09:15Z and ~12Z on 08/06/2021. The root cause of these one-day event anomalies was a large slip of the beginning time of the M3 timelines that day. At ~9UTC it caused the gainset switch occurring within the timeline. At ~12UTC incomplete timeline data were collected. Details are available in the slides presented in the CWG meeting on 08/11/2021 and 08/18/2021.
G17 IR calibration anomaly	06/18/2021	07/29/2021	G17 ABI B08-B16 experienced a radiometric calibration anomaly at several timelines when the FPM temperature started to increase at night since 06/18/2021. This led to a bump feature in the GEO-GEO inter-comparison. The issue was resolved with the update of the pCal LUT on 07/29/2021. Details are available in the CWG meeting report on 08/04/2021.
B09 striping and BDS update	08/03/2021	08/19/2021	Striping was occasionally observed in B09 at 06:30z since 08/03. It was caused by the elevated noise of the Det#98. The issue was improved with the BDS map update on 08/19/2021. Details are available in the CWG presentations on 08/11/2021 and 08/25/2021.
Large solar calibration variation	08/07/2021		The G17 B03 radiance may have been lower by up to 3.7% (1.6% for B02) since 08/07/2021 when a solar calibration on that day occurred at high FPM temperature. This may end after the next scheduled solar calibration on Sept 8. More details were reported to the CWG meeting on 08/11/2021.
GOES-17 Yaw Flip	09/07/2021	09/07/2021	G17 Yaw Flip was performed between 20:40-21:29 UTC (no image in this period). All images (FD CONUS MESO1 MESO2) before and after the yaw flip are nominal. Minor and transient impact on INR after the flip. Details are in the presentation by S. Guo and V. Kondratovich at the 2020-09-08 CWG meeting.
Broad striping in FD/CONUS images by lunar intrusion	08/24/2021	08/24/2021	road striping was observed in the B10/B11/B12/B15 FD L1b images at ~23:50 UTC and in their CONUS L1b images at ~23:56z on 08/24/2021. It was caused by the lunar intrusion into the spacelook scene. Detailed information is available in the CWG presentation on 09/08/2021.
Broad striping in FD images by lunar intrusion	08/27/2021	08/27/2021	Broad striping was observed in the B09/B13 FD L1b images at ~01:00 UTC and in B10/B11(very faint)/B12(faint)/B15 FD L1b images at ~01:10 UTC on 08/27/2021. It was caused by the lunar intrusion into the spacelook scene. Detailed information is available in the CWG presentation on 09/08/2021.
BOA Anomaly	09/03/2021	09/03/2021	G17 Ch08-16 FD images were corrupted in the bright object avoidance (BOA) swaths at 09:00Z on 09/03/2021 and 09/04/2021. The root cause was the early midnight spacelook swap on these two days. Details are available in the CWG meeting slides on 09/15/2021.
Cooling operation	08/06/2021	09/07/2021	The flexible M3 cooling timeline was applied from 06:00-12:00Z every day between 08/06/2021 and 09/07/2021. The cooling timeline was accidentally not implemented on 09/02/2021. Details in the CWG meeting reports on 09/15/2021 and 09/22/2021.
Broad striping in L1b images by a lunar intrusion	09/22/2021	09/22/2021	Broad striping was observed in the B08/B09/B13/B14 L1b images at 23:10 - 23:20 UTC on 09/22/2021. It was caused by the lunar intrusion into the SPL scene. Detailed information is available in the CWG slides presented by Qian on 09/29/2021.
Broad striping in L1b images by a lunar intrusion	09/21/2021	09/21/2021	G17 B08/B09/B10/B13/B14/B15 L1b images displayed a series of broad striping in the L1b images collected between 20:30 - 20:39 UTC on 09/21/2021. They were caused by the lunar intrusion in the nominal SPL and/or the ICT SPL. Detailed information is available in the CWG presentation by Qian on 09/29/2021.
Broad striping in L1b images by a lunar intrusion	09/20/2021	09/20/2021	Broad striping was observed in the B08/B09/B13/B14 FD L1b images at ~20:20 UTC and the CONUS L1b images at ~20:25 UTC and MESO1 at 20:28 UTC on 09/20/2021. It was caused by the lunar intrusion into the spacelook scene. Detailed information is available in the CWG presentation on 09/29/2021.
FPM setpoint temperature test - Part I	09/17/2021	09/20/2021	G17 ABI FPM setpoint temperature was tested at 78K during this period. Details in the CWG meetings between 09/27/2021 - 10/20/2021.
FPM setpoint temperature test - Part II	09/22/2021	09/24/2021	G17 ABI FPM setpoint temperature was tested at 84K during this period. Details in the CWG meetings between 09/27/2021 - 10/20/2021.
FPM setpoint temperature change	10/08/2021		G17 ABI FPM setpoint temperature has changed from 81K to 84K on 10/08/2021. Details in the CWG meetings on 10/06/2021 and 10/13/2021.
pCal LUT Case13 deployment	10/15/2021	10/13/2022	The pCal control for the FPM 84 K setpoint was updated with Case13 on 10/15/2021. This sub-optimal LUT may trigger a later pCal implementation and cause a calibration bias at some IR channels around satellite midnight time. Detailed information is available in the CWG presentation on 10/20/2021.
FPM setpoint test - Part III	10/18/2021	10/20/2021	G17 ABI FPM setpoint temperature was set at 87K during this period. Details in the CWG meeting on 10/20/2021.
Broad striping caused by lunar intrusion	10/17/2021	10/20/2021	Broad striping was observed due to lunar intrusion into the spacelook scene. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: 10/17 1829Z bands 08 11 12 14 16; 10/18 1856Z bands 11 12; 10/19 1943Z bands 08 10 15 16; 10/19 2113Z bands 09 13; 10/20 2040Z bands 08 14 16; 10/20 2130Z bands 08 16. Details in the CWG meeting on 10/27/2021.
FPM setpoint test - Part III (Extended)	10/25/2021	10/29/2021	G17 AB12/22/2021I FPM setpoint temperature was set at 87K during this period. Details in the CWG meeting on 11/03/2021.
Broad striping caused by lunar intrusion	11/13/2021	11/16/2021	Broad striping was observed due to lunar intrusion into the spacelook scene. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: 11/13 1640Z timeline in bands 8 and 14; 11/14 1650Z timeline in bands 11 and 12; 11/15 1740Z timeline in bands 9 and 13; 11/16 1830Z timeline in bands 8 11 12 and 16.
Broad striping by lunar intrusion	11/30/2021	11/30/2021	A broad striping was observed in the G17 ABI B10/B15 L1b images at 06:00 UTC on 11/30/2021 due to a lunar intrusion. Details are available in the CWG meeting report on 12/08/2021.
G17 IR calibration anomaly	11/30/2021	11/30/2021	The pCal algorithm was temporarily turned off on 11/30/2021 at 17:00 UTC after a short time data outage during 16:25 - 17:00 UTC. This was due to a ground system hardware issue. This affected radiometric calibration uncertainty for Bands 08-16 and the FPM temperature in the metadata at this timeline was abnormal.
BDS maps update	12/22/2021	12/22/2021	G17 BDS maps for B08-16 were updated at ~16:11Z on 12/22/2021 to improve the image quality of these IR channels. Details in the CWG meetings on 12/15/2021 and 12/22/2021.
Broad striping caused by lunar intrusion	12/12/2021	12/13/2021	Broad striping was observed due to lunar intrusion into the spacelook scene. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: 12/12 1530Z timeline in bands 11 and 12; 12/12 1540Z timeline in bands 08 11 12 14; 12/13 1620Z timeline in bands 11 and 12; 12/13 1630Z timeline in bands 09 and 13. Details in the CWG meeting on 12/22/2021.
Broad striping caused by lunar intrusion	12/26/2021	12/27/2021	Broad striping was observed due to lunar intrusion into the spacelook scene. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: 12/26 0300Z timeline in bands 10 and 15; 12/27 0400Z timeline in bands 09 and 13. Details in the CWG meeting on 01/05/2022.
Broad striping caused by lunar intrusion	01/06/2022	01/10/2022	Broad striping was observed due to lunar intrusion into the spacelook scene. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: 1/7 1300Z timeline in bands 08 and 14; 1/8 1330Z timeline in band 16; 1/9 at 1422Z in bands 08 09 13 and 14; and 1/10 in bands 09 10 13 15 at 1520Z.
Large image navigation errors	01/20/2022	01/20/2022	18:50 UTC FD image and 18:51 CONUS image have large navigation errors in all channels - 6 urad in the East-West and 12 urad in the North-South direction due to the error in ground processing. Refer to Bin Tan's slides at Operations INR meeting on 2022-02-02 and to CWG INR monitoring on the web.
Cooling operation	10/10/2021	11/11/2021	The M3 cooling timeline was implemented between 10/10/2021 and 11/11/2021 from 06:00 - 12:00 UTC. Details in the weekly CWG meeting report during this period.
Cooling operation	02/03/2022	02/27/2022	The mode 3 cooling timeline was implemented between 02/03/2022 and 02/27/2022 from 0600 - 1200 UTC. Details in the weekly CWG meeting report during this period.
BDS V-V re-collection	02/15/2022	02/15/2022	G17 ABI executed a Best Detector Select (BDS) V-V collect at 87 K setpoint from 19:00 - 20:10 UTC on 02/15/2022. There was a data outage during this period. Details in the CWG meeting report on 02/16/2022.
Degraded IR Images	02/15/2022	02/15/2022	Some of G17 IR images were degraded from 20:10 - 23:59 UTC on 02/15/2022. The anomaly was fixed with a GS correction. Details in the CWG meeting report on 02/16/2022.
Broad striping caused by lunar intrusion	02/18/2022	02/21/2022	Broad striping was observed due to lunar intrusion into the spacelook scene. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: 2/18 2350Z timeline in bands 08 and 16; 2/20 0040Z timeline in bands 09 and 13; and 2/21 at 0110Z in bands 9 and 13. Details in the CWG meeting on 02/23/2022.
Broad striping caused by lunar intrusion	03/05/2022	03/05/2022	Broad striping was observed due to lunar intrusion into the spacelook scene. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: 3/5 1050Z timeline in band 9 (1050 FD; 1051 CONUS; 1052 M1 and M2). Details in the CWG meeting on 03/16/2022.
FPM setpoint at 87 K	02/08/2022	02/22/2022	G17 ABI FPM setpoint temperature changed from 84 K to 87 K from 02/08/2022 to 02/22/2022. Details in the CWG meeting on 03/09/2021.
FPM setpoint at 93 K	02/22/2022	02/25/2022	G17 ABI FPM setpoint temperature changed from 87 K to 93 K from 02/22/2022 to 02/25/2022. Details in the CWG meeting on 03/09/2021.
FPM setpoint at 87 K	02/25/2022	02/28/2022	G17 ABI FPM setpoint temperature changed from 93 K to 87 K from 02/24/2022 to 02/28/2022. Details in the CWG meeting on 03/09/2021.
FPM setpoint at 84 K	02/28/2022	04/07/2022	ABI FPM setpoint temperature was set to 84 K during this period.
B09 striping and BDS update	01/04/2022	01/20/2022	Intermittent thin striping was seen in some products of B09 beginning on 1/4/22 at 1:04Z. This was caused by unstable and noisy detector performance from row #296. The detector on this row was switched with a BDS map update on 1/20/22 at 17:38Z which resolved the striping. See details in the CWG presentation on 01/12/2022.
B08 striping and BDS update	01/22/2022	01/31/2022	Intermittent and strong thin striping was seen in all products of B08 beginning on 1/22/22 at 21:19Z. This was caused by unstable and noisy detector performance from row #256. The detector on this row was switched with a BDS map update on 1/31/22 at 19:22Z which resolved the striping. See details in the CWG presentation on 01/26/2022.
B10 striping and BDS update	02/09/2022	03/18/2022	Mild thin striping was seen in all products of B10 on 2/9/2022 but dissipated on its own. Striping then returned and persisted intermittently beginning on 2/26/2022 following the part of the day with saturated images. This was caused by unstable and noisy detector performance from row #211. The detector on this row was switched with a BDS map update on 3/18/22 at 17:21Z which resolved the striping. See details in the CWG presentation on 03/16/2022.
B10 striping and BDS update	02/19/2022	02/25/2022	Intermittent and strong thin striping was seen in all products of B10 beginning on 2/19/22 at 20:06Z. This was caused by unstable and noisy detector performance from row #273. The detector on this row was switched with a BDS map update on 2/25/22 at 14:52Z which resolved the striping. See details in the CWG presentation on 02/23/2022.
Yaw flip	04/05/2022	04/05/2022	Yaw flip was performed between 20:31 and 21:29 UTC. The FD/CONUS/MESO images are good before and after the yaw flip period with no impact on INR. ABI INR monitoring was presented at the 04/08/2022 CWG meeting.
B11 striping and BDS update	04/10/2022	04/18/2022	Strong striping was seen in all products of B11 beginning on 4/10/2022 at 05:49Z. This was caused by a dead detector on row #65. This detector performance also impacted neighboring detectors causing intermittent striping while the BDS update was in work. The detector on this row was switched with a BDS map update on 4/18/2022 at 12:54Z which replaced the dead detector and resolved all striping. See details in the CWG Presentation on 4/15/2022.
FPM setpoint at 90 K	04/08/2022	04/11/2022	G17 ABI IR FPM setpoint temperature was set at 90 K from 84 K during this period. Details in the CWG report on 04/15/2022.
FPM setpoint at 92.8 K	04/11/2022	04/19/2022	G17 ABI IR FPM setpoint temperature was set at 92.8 K during this period. Details in the CWG report on 04/15/2022 and 04/22/2022.
FPM setpoint at 87 K	04/21/2022	04/29/2022	G17 ABI IR FPM setpoint temperature was set at 87 K from 90 K during this period. Details in the CWG report on 04/29/2022.
FPM setpoint at 90 K	04/19/2022	04/21/2022	G17 ABI IR FPM setpoint temperature was set at 90 K from 92.8 K during this period. Details in the CWG report on 04/29/2022.
FPM setpoint at 84 K	04/29/2022	08/16/2022	G17 ABI IR FPM setpoint temperature was resumed to 84K on 04/29; after the warm period. Details in the CWG reports on 05/06/2022. Keyword: RAD
B08 striping and BDS update	04/23/2022	05/05/2022	Intermittent striping was seen in the products of B08 beginning on 04/23/2022 following thermal impacts from the day. This was caused by unstable detector performance from row #34. The detector on this row was switched with a BDS map update on 05/05/22 at 15:21Z which resolved the striping. See details in the CWG presentation on 05/06/2022.
Corrupted B08-B16 images	04/18/2022	04/18/2022	G17 Ch08-16 FD images were corrupted at the swaths near the northern polar region at 09:00Z on 04/18/2022. The root cause is due to the unprotected B08-16 spacelook counts at the bright object avoidance (BOA) swaths. Details are available in the CWG meeting slides on 05/06/2022 and reference older slides on 09/15/2021.
Broad striping caused by lunar intrusion	04/28/2022	04/28/2022	Broad striping was observed due to lunar intrusion into the spacelook scene. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: 04/28 during the 08:00Z timeline impacting the lower half of the FD of B16. Details in the CWG meeting on 05/06/2022.
Broad striping caused by lunar intrusion	04/14/2022	04/16/2022	Broad striping was observed due to lunar intrusion into the spacelook scene. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: 04/14 at 19:01Z impacting B11 and B15; 04/15 at 19:45Z impacting B11 and B15; 04/15 during the 21:10Z timeline impacting B11; and 04/16 at 20:49Z impacting B15. Details in the CWG meeting on 05/06/2022.
Striping caused by lunar intrusion	04/14/2022	04/16/2022	Stripes and some broad faint striping were present in select products due to lunar intrusion into the space look during their timelines. The single pixel stripes are caused by a known issue in the enhanced lunar rejection algorithm. The contaminated spacelook observations occurred on B08 and B09 in the FD and CONUS on 04/14 during the 14:40Z timeline; on 04/15 at 15:24Z impacting FD B08 and B14; and on 04/16 at 17:28Z impacting B09. Details in the CWG meeting on 05/06/2022.
B12 BDS update	05/03/2022	05/11/2022	The detector on B12 row 12 began to show anomalous performance on 05/03/2022 at 04:12Z. The anomalous detector performance can be seen in the L0 data but the row is close enough to the edge of the swath that it is filtered out in the swatch stitching step. The detector on this row was switched with a BDS map update on 05/11/22 at 14:37Z which resolved the anomalous behavior. See details in the CWG presentation on 05/13/2022.
Broad striping caused by lunar intrusion	05/24/2022	05/26/2022	Broad striping was observed due to lunar intrusion into the spacelook scene. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: 05/24 at 05:08Z impacting the B10 and B15 FD products; 05/25 at 06:06Z impacting the B10 and B15 FD CONUS M1 and M2 products; and 05/26 at 06:42Z impacting the B08 B09 and B14 FD CONUS and M2 products. Details in the CWG meeting on 06/03/2022.
Striping caused by lunar intrusion	05/11/2022	05/13/2022	Stripes and some broad faint striping were present in select products due to lunar intrusion into the space look during their timelines. The single pixel stripes are caused by a known issue in the enhanced lunar rejection algorithm. The contaminated spacelook observations occurred on 05/11 at 12:40Z impacting the B08 FD product; on 05/12 at 13:13Z impacting the B08 B09 and B14 FD products; and on 05/13 during the 14:00Z timeline impacting the B10FD product. Details in the CWG meeting on 06/03/2022.
Broad striping caused by lunar intrusion	05/11/2022	05/13/2022	Broad striping was observed due to lunar intrusion into the spacelook scene. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: 05/11 at 16:50Z impacting the B09 and B13 FD CONUS M1 and M2 products; 05/12 at 17:33Z impacting the B10 B11 B12 and B15 FD M1 and M2 products; and 05/13 at 18:27Z impacting the B11 and B12 FD CONUS M1 and M2 products.Details in the CWG meeting on 06/03/2022.
Broad striping caused by lunar intrusion	06/07/2022	06/10/2022	Broad striping was observed due to lunar intrusion into the spacelook scene. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: 06/07 at 15:00Z impacting the B08 and B14 FD products; 06/08 at 15:22Z impacting the B09 and B13 FD CONUS M1 and M2 products; 06/09 at 16:06Z impacting the B08 B09 B13 and B14 FD CONUS and M1 products; and 06/10 at 17:09Z impacting the B08 B09 B13 and B14 FD and M1 products. Details in the CWG meeting on 07/08/2022.Keyword: RAD
Broad striping caused by lunar intrusion	06/20/2022	06/23/2022	Broad striping was observed due to lunar intrusion into the spacelook scene. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: 06/20 at 02:49Z impacting the B09 and B13 M2 products; 06/21 at 03:57Z impacting the B09 and B13 FD CONUS and M1 products; 06/22 at 04:43Z impacting the B08 B09 and B14 FD CONUS and M2 products; 06/23 at 05:10Z impacting the B08 and B14 FD products; and 06/23 at 05:20Z impacting the B11 and B12 FD and M2 products. Details in the CWG meeting on 07/08/2022.Keyword: RAD
B12 striping and BDS update	06/30/2022	07/07/2022	Striping was seen in the products of B12 beginning on 06/30/22 at 11:17Z due to anomalous performance from the detector on row #72. The performance caused worse striping during the gain set 1 periods of the day (1900Z - 0900Z). The detector on this row was switched with a BDS map update on 07/07/22 at 21:33Z which resolved the striping. See details in the CWG presentation on 07/08/2022.Keyword: RAD
B09 mild striping and BDS update	12/22/2021	07/07/2022	Mild striping has been present in the products of B09. Upon investigation
GOES-17 mini-drift	07/05/2022	07/16/2022	GOES-17 drifted from the West position at 137.2W to the West position at 137.3W with uninterrupted Earth observation. The mini-drift started on 7/5 and ended on 7/16. It had no impact on Science products. Keyword: RAD
B11 striping and BDS update	07/21/2022	08/03/2022	Striping was seen in the products of B11 beginning on 07/21/22 at 12:13Z due to anomalous performance from the detector on row #310. The performance caused worse striping during the gain set 1 periods of the day (1900Z - 0900Z). The detector on this row was switched with a BDS map update on 08/03/22 at 19:42Z which resolved the striping. See details in the CWG presentation on 08/05/2022.Keyword: RAD
G17 VNIR anomaly	08/15/2022	08/16/2022	Due to software updates conducted by the ground system G17 had inappropriate gains on 08/16 00:00 20:00 UTC and G17 gains are back to normal on 08/17. This anomaly was seen for all G17 VNIR channels.Keyword: RAD
G17 VNIR anomaly	08/18/2022	08/18/2022	There was a failure of hardware server changes data outage and anomaly occurred on 08/18. The anomaly lasted about 1 hour between 19:30 UTC and 20:30 UTC and was back to normal on the same day. This anomaly was seen for all G17 VNIR channels.Keyword: RAD
Broad striping caused by lunar intrusion	07/05/2022	07/06/2022	Broad striping was observed due to lunar intrusion into the spacelook scene. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: 07/05 impacting the 13:20Z B13 FD product; 07/06 at 14:00Z impacting the B08 and B14 FD products; 07/06 at 14:05Z impacting the B10 and B15 FD products; and 07/06 at 14:05Z impacting the B11 and B12 14:00Z and 14:10Z FD products. Details in the CWG meeting on 09/02/2022.Keyword: RAD
Broad striping caused by lunar intrusion	07/18/2022	07/20/2022	Broad striping was observed due to lunar intrusion into the spacelook scene. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: 07/18 at 01:48Z impacting the B08 B09 B13 and B14 FD products; 07/19 at 20:40Z impacting the B08 and B14 FD products; 07/19 at 20:45Z impacting the B10 B11 B12 and B15 FD products; and 07/20 at 03:21Z impacting the B11 and B12 FD products. Details in the CWG meeting on 07/08/2022.Keyword: RAD
Broad striping caused by lunar intrusion	08/15/2022	08/17/2022	Broad striping was observed due to lunar intrusion into the spacelook scene. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: on 08/15 at 00:36Z impacting the B11 and B12 FD CONUS and M1 products; and on 08/17 at 01:40Z impacting the B08 and B14 FD products. Details in the CWG meeting on 09/16/2022.Keyword: RAD
Yaw flip	09/06/2022	09/06/2022	GOES-17 yaw flip was performed between 20:40-21:39 UTC. The L1b FD/CONUS/MESO before and after the yaw flip are all normal. The yaw flip flag was correctly set. No impacts to INR after yaw flip. Reported at the 09/09/2022 CWG meeting by Song Guo and Vladimir Kondratovich. Keyword: INR.
Elevated image navigation residuals	08/08/2022	08/08/2022	HCR reset at 1300 UTC caused elevated navigation residuals on NS direction. Reported at the 08/12/2022 CWG meeting by Song Guo and Vladimir Kondratovich. Keyword: INR
Broad striping caused by lunar intrusion	09/10/2022	09/12/2022	Broad striping was observed due to lunar intrusion into the spacelook scene. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: on 09/10 at 20:58Z impacting the B08 B14 and B16 FD CONUS and M1 products; on 09/10 at 22:18Z impacting the B08 B09 B13 and B14 FD CONUS and M1 products; on 09/11 at 23:04Z impacting the B11 and B12 FD product; and on 09/12 at 23:40Z impacting the B10 and B15 FD product. Details in the CWG meeting on 10/21/2022.Keyword: RAD
B09 mild striping and BDS update	07/07/22	07/07/22	Mild striping has been present in the products of B09. Upon investigation;under-performing detectors were found on row 261 and 294. The detectors on those rows were switched with a BDS map update on 07/07/22 at 21:34Z which improved the striping. See details in the CWG presentation on 07/15/2022.Keyword: RAD
B10 striping and BDS update	11/19/21	12/2/21	Striping was seen in the products of B10 beginning on 11/19/21 at 10:27Z due to anomalous performance from the detector on row #212. Striping was mitigated on 11/19/21 at 19:32Z by allowing the GS to see saturated values from this detector and filter it out in subsequent images. The detector on this row was switched with a BDS map update on 12/02/22 at 19:23Z which resolved the striping. See details in the CWG presentation on 12/01/2022.Keyword: RAD
FPM setpoint at 87K	08/16/2022	08/25/2022	The setpoint of the G17 IR FPM temperature was elevated from 84K to 87K on 08/16 and remained as operational till 08/25. Reference to the reports in the CWG meeting on 08/26/2022. Key word: RAD
FPM temperature setpoint at 90K	08/25/2022	08/29/2022	The setpoint of the G17 IR FPM temperature was elevated from 87K to 90K on 08/25 and remained as operational till 08/29/2022. Reference to the reports in the CWG meeting on 09/02/2022. Key word: RAD
IR FPM setpoint at 92.8K	08/29/2022	09/02/2022	The setpoint of the G17 IR FPM temperature was changed from 90K to 92.8K on 08/29 and kept as operational till 09/02/2022. Reference to the reports in the CWG meeting on 09/09/2022. Key word: RAD
IR FPM setpoint at 84K	09/02/2022	10/04/2022	The operational setpoint of the G17 IR FPM temperature was set back to 84K on 09/02 till 10/04. Reference to the reports in the CWG meeting on 09/09/2022. Key word: RAD
IR FPM setpoint at 92.8K	10/14/2022	10/20/2022	The setpoint of the G17 IR FPM temperature was elevated from 84K to 92.8K on 10/14 and kept as operational till 10/20. Reference to the reports in the CWG meeting on 10/21/2022. Key word: RAD
B11 striping and BDS update	10/22/22	11/04/22	Intermittent striping was seen in the products of B10 beginning on 10/22/22 at 1832Z due to anomalous performance from the detector on row #68. The detector on this row was switched with a BDS map update on 11/04/22 at 14:45Z which resolved the striping from this detector. See details in the CWG presentation on 11/09/2022.Keyword: RAD
Broad striping caused by lunar intrusion	10/07/2022	10/09/2022	road striping was observed due to lunar intrusion into the spacelook scene. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: on 10/07 at 18:59Z impacting the B08 B11 B12 and B14 FD and M1 products; on 10/08 at 19:26Z impacting the B10 B11 and B12 FD and M1 products; and on 10/09 at 21:42Z impacting the B07 B08 B10 B14 B15 and B16 FD and M1 products. Details in the CWG meeting on 11/09/2022.Keyword: RAD
IR FPM setpoint resumed at 84K	11/02/2022		G17 IR FPM setpoint was resumed to 84K on 11/02/2022. Reference to the CWG calibration report on 11/09/2022. Keyword: RAD
Corrupted B08 - B16 images	11/08/2022	11/08/2022	The pCal operational algorithm failed to be temporally suspended at the 19:30 UTC gainset switch (GSS) event on 11/08/2022 to avoid the GSS and pCal collision. This GSS and pCal collision anomaly caused the corrupted B08-B16 images at 19:30 - 19:40 UTC timeline on 11/08/2022. Detailed report is available at the CWG report on 11/30/2022. Keyword: RAD.
Corrupted B08 - B16 images	11/19/2022	11/19/2022	The pCal operational algorithm was not temporally suspended at the 19:30 UTC gainset switch (GSS) event on 11/19/2022. This GSS and pCal collision anomaly caused corrupted B08-B16 images at 19:30 - 19:40 UTC timeline on 11/19/2022. More information is available at the CWG report on 11/30/2022. Keyword: RAD.
Corrupted B12 - B16 images	11/20/2022	11/20/2022	The pCal operational algorithm was not temporally suspended for the LWIR bands at the 08:30 UTC gainset switch (GSS) event on 11/20/2022. This anomaly caused the collision of the GSS and pCal events and consequently the corrupted B12-B16 images at 08:30 - 08:40 UTC timeline. More information is available at the CWG report on 11/30/2022. Keyword: RAD.
pCal Case 15 LUT update	10/13/2022		G17 pCal case 15 LUT was updated at ~19:18 UTC on 10/13/2022 to reduce the "midnight bump" at B08-B16 caused by pCal case 13. The new LUT however causes the equatorial striping near the satellite midnight time at these IR channels.
G17 IR anomaly	11/19/2022	11/19/2022	G17 IR bands FD image degradation was observed at 19:30 UTC on that day. This anomaly was caused by the collision of pCal flag and gainset switch
G17 IR anomaly	12/03/2022	12/03/2022	A slight degradation of G17 B08-B12 bands FD images was observed at 11:10 UTC. This anomaly was caused by a slight low spacelook at 11:10 UTC triggering an incorrect gain value under pCal condition. See details in the CWG presentation on 12/14/2022. Keyword: RAD
Degraded timelines for B13-16	11/28/22	11/28/22	Invalid gains were calculated due to the gainset switch occurring after a timeline which started early. The first space look occurred with one set of parameters and the rest of the timeline operated with another. This caused invalid gain and degraded imagery from 0830Z-0835Z for B13-16. Data package presented at CWG Meeting on 12/07/2022. Keyword: RAD.
Broad striping caused by lunar intrusion	11/19/22	11/19/22	Broad striping was observed due to lunar intrusion into the spacelook scene. The contaminated spacelook observations occurred at the following times for the specified bands and caused degradation in the products scanned during that time: on 11/19 at 05:52Z impacting the B10 and B15 FD CONUS and M1 products; and on 11/20 at 06:35Z impacting the B11 and B12 FD and M2 products. Details in the CWG meeting on 12/07/2022.Keyword: RAD
GRB distribution never re-enabled for pre-storage checkout	03/13/23	03/14/23	GOES-17 GRB distribution was planned for one more day prior to GOES-17 entering storage mode. However due to a Ground System issue data was not distributed via GRB. L0 and L1b (starting at ~1915Z on 03/13) Data is available via LZSSc. This limitation on data availability is not related to instrument calibration. See details in the CWG presentation on 03/15/2023.
G17 decommissioned as GOES-West	01/04/2023	01/04/2023	GOES-17 was decommissioned as the GOES-West satellite on 01/04/2023. Details in the CWG meeting 01/04/2023. Keyword: RAD/INR
G17 drifting to the storage position	01/10/2023	02/10/2023	GOES-17 drifted from the GOES-West position at 137.3W on 01/10/2023 and reached the storage position at 104.7W on 02/10/2023. The spacecraft was declared to enter the storage mode at 14:00 UTC on 03/14/2023 after one-month pre-storage check testing. Details in the CWG meetings from 02/08 to 03/15/2023. Keyword: RAD/INR

Event	StartDate	EndDate	Description
LWIR channel navigation shifts	05/12/2022	05/16/2022	Large navigation shifts of 108 urads to the West and 65 urads to the North were detected by CENRAIS for all channels of LWIR focal plabe (channels 12 to 16). ABI INR monitoring was presented at the 5/13/22 CWG meeting by V. Kondratovich and S. Guo. Keyword: INR
B11 elevated navigation error	05/12/2022	05/16/2022	Elevated navigation shift was detected by CENRAIS for B11 in the North direction. The shift exhibits a diurnal variation up to 10 urads. ABI INR monitoring was presented at the 5/13/22 CWG meeting by V. Kondratovich and S. Guo. Keyword: INR
Calibration update lowered B04 radiance by 1.2%	06/07/2022	06/07/2022	The power term of the integration factor for B04 was corrected from 1.3 to 1.0 on 06/07/2022. This update reduced B04 radiance by ~1.2%. Details in the CWG meeting slides on 05/20 and 06/10/2022. Keyword: RAD
B01/B02 Q LUT update	05/05/2022	06/07/2022	The look-up tables (LUT) of the detector quadratic term (q) in the ABI radiometric calibration were updated and went live for B01 and B02 at the solar calibration events on 06/07/22. The intermittent weak striping in B02 images over bright clouds was reduced after the update. Details in the CWG meeting slides on 06/10/22. Keyword: RAD
GMAG Magnetometer calibration maneuver	06/29/2022	06/29/2022	GMAG Magnetometer calibration maneuver was conducted between 18:30 and 23:30 UTC. The ABI was parked at 18:30 UTC the timeline 19 was started at 22:17 UTC. The first FD image after is 22:20 UTC with elevated residuals for all bands. The FD images starting from 22:30 UTC fell back to normal ranges. The results were presented at the 07/08/2022 CWG meeting.Keyword: INR.
GMAG Magnetometer calibration maneuve	07/06/2022	07/06/2022	GMAG Magnetometer calibration maneuver was conducted between 18:30 and 23:30 UTC. The ABI was parked at 18:30 UTC the timeline 19 was started at 22:12 UTC. The first FD image after is 22:20 UTC with elevated residuals for all bands. The FD images starting from 22:30 UTC fell back to normal ranges. The results were presented at the 7/15/22 CWG meeting.Keyword: INR.
Major INR anomaly	06/28/2022	06/28/2022	Due to an error in LUT update ABI stopped IR star observation from 21:00 UTC on June 27 to 9:00 UTC on June 28. That triggered a gap in the navigation correction of IR images from 3:00 to 9:00 UTC on June 28. The navigation errors of IR images produced in that period may be up to 15 urads in EW direction and up to 68 urads in the NS direction. The full description of the anomaly was presented at 7/15/2022 CWG meeting by Vladimir Kondratovich and Song Guo.Keyword: INR.
Encoder scale factor update	07/12/2022	07/12/2022	Encoder scale factor is updated and verified. That improves INR precision.Presented at 7/22/2022 CWG meeting by Vladimir Kondratovich and Song Guo.Keyword: INR.
Detector map change	07/15/2022	07/15/2022	Rotation of VNIR focal plane detector map introduced on June 7 is undone. That prepares detector map for a different adjustment. INR is not appreciable changed by these operations.The full description of the anomaly was presented at 7/15/2022 CWG meeting by Vladimir Kondratovich and Song Guo.Keyword: INR.
Corrupted B07 images	06/27/2022	06/28/2022	The B07 images were corrupted from ~14 Z on 06/27/2022 and ~14 Z on 06/28/2022. This anomaly was caused by the failure performance of B07 scan-mirror (SM) emissivity LUT which was updated at ~14 Z on 06/27/2022. Details in the CWG talks on 07/01.Keyword: RAD
IR scan-mirror LUT update	07/15/2022	07/15/2022	The IR scan mirror look-up-tables (LUTs) were updated on 07/15/2022 to improve the spatial uniformity performance of the IR radiance. As a result the periodic infrared calibration anomaly (PICA) and the slight midnight/noon radiance jumps were reduced. Details in the CWG talks on 07/22 .Keyword: RAD.
GOES-18 Drift	05/16/2022	06/07/2022	GOES-18 was drifting from the Checkout position (89.5W) to the West position (136.8W). No images are produced during the drift. The last FD image before the start is at 13:40 UTC on 5/16 and the first FD image after the drift is at 1:20 UTC on 6/7.
GOES-18 mini-drift	07/05/2022	07/20/2022	GOES-18 drifted from the West position at 136.8W to the West position at 137.0W with uninterrupted Earth observation. The mini-drift started on 7/5 and ended on 7/20. It had no impact on Science products. Keyword: RAD
INR anomaly	07/12/2022	07/12/2022	Data outage occurred from 16:00 to 18:30 UTC during the Data and GNC tests. The first FD image after the gap appeared at 18:30 UTC with elevated residuals for all channels in both EW and NS directions. The results were presented at the 7/22/22 CWG meeting.Keyword: INR.
INR anomaly	07/13/2022	07/13/2022	Data outage occurred from 20:20 to 22:30 UTC during the Spectral Uniformity tests. The first FD image after the gap appeared at 22:30 UTC with elevated residuals for all channels in both EW and NS directions. The results were presented at the 7/22/22 CWG meeting.Keyword: INR.
B02 bias correction	07/25/2022		The new B02 K-LUT was deployed during the solar calibration at 15:15UTC on 07/25/2022. This GS update reduced the B02 radiance by about 3.4%. Details in the CWG meeting on 07/29/2022.Keyword: RAD
B11 striping and BDS update	07/05/2022	07/22/2022	Strong striping was seen in the B11 L1b imagery beginning on 07/05/2022 at 14:34Z due to the underperformance of the BDS detector on row #86. The issue was resolved with the BDS map update on 07/2022/22 at 20:24Z. See details in the CWG presentation on 07/29/2022. Keyword: RAD
B07 BDS updates	08/17/2022	08/17/2022	The B07 BDS map was updated for row#094 and #143 on August 17 2022 to reduce the faint striping in the L1b images. More details in the CWG meeting slides on 08/19/2022.Keyword: RAD
B07 horizontal striping	08/29/2022	08/31/2022	G18 B07 images displayed horizontal stripings which started from satellite midnight and lasted a few hours during these days. The cause and resoltion were were available at the CWG meeting slides on 09/02/2022. Keyword: RAD.
G18 IR anomaly	08/28/2022	08/28/2022	A small IR calibration anomaly (< ~0.1K@300K) occurred from ~21:00 to ~23:00 UTC on 08/28/2022. This anomaly was associated with the rapid change of ICT temperature during this period. Details are in the CWG slides presented on 09/02/2022 and 09/09/2022. Keyword: RAD
G18 IR anomaly	09/11/2022	09/11/2022	A channel dependent IR calibration anomaly occurred when the G18 IR FPM temperature dropped from 61 K to 58 K during 23:00 23:30 UTC on 09/11/2022. The impact was the largest on B14 at < 0.3 K @ 300K and may not be perceptible at some IR channels. Details are in the CWG presentations on 09/16/2022. Keyword: RAD
G18 IR anomaly	09/16/2022	09/19/2022	A large time and channel dependent IR radiometric calibration anomaly occurred during ~18:00 UTC ~08:00 UTC in these three days. The anomaly was associated with the ICT heaters off event from 09/16 and 09/19. The peak of the anomaly occurred at ~2 UTC and ranged from ~4K to ~10K at different IR channels. See details in the CWG presentation on 09/23/2022. Keyword: RAD
Elevated image navigation residuals	07/26/2022	07/26/2022	Elevated image navigation shifts at 2050 UTC for all channels in both directions. Larger for EW direction VNIR channels. Reported at the 07/29/2022 CWG meeting by Song Guo and Vladimir Kondratovich. Keyword: INR
Elevated image navigation residual	08/15/2022	08/15/2022	Elevated navigation residuals at 2150 UTC for all channels in both directions. Larger for VNIR channels. Reported at the 08/19/2022 CWG meeting by Song Guo and Vladimir Kondratovich. Keyword: INR
Image navigation anomaly	09/16/2022	09/16/2022	Elevated navigation residuals for some channels in both directions after the data gap at 10:30 UTC. The residuals are extremely large for VNIR and less for IR channels. Reported at the 09/23/2022 CWG meeting by Song Guo and Vladimir Kondratovich.Keyword: INR
Elevated navigation residuals	08/29/2022	08/29/2022	Elevated navigation residuals at 1740 UTC after the data gap for all bands in the East-West direction and VNIR channels in the North-South direction. Reported at the 09/02/2022 CWG meeting by Song Guo and Vladimir Kondratovich. Keyword: INR
Elevated navigation residuals	09/06/2022	09/06/2022	Elevated navigation residuals for some channel after the data gap before at 22:10 UTC. Reported at the 09/16/2022 CWG meeting by Song Guo and Vladimir Kondratovich. Keyword: INR
B07 Barcode Artifact	04/22/2022		A minor dynamic series of vertical striping (named as Barcode Artifact) was often observed in the GOES-18 Ch07 (3.9um) images. It is most noticeable in cold scenes or uniform scenes in the image difference. This artifact was present in L1b images and radiometric calibration data during the day and night. Intensive investigation was conducted between 07/27/2022 and 10/05/2022 and included changing the ICT temperature/FPM temperature/ A/D delays and other instrument maneuvers and special data collections. The artifact mostly disappeared after 0110 UTC on 09/22/2022. The root cause is currently unknown. More information is available in the weekly CWG meeting slides from 07/01/2022. Keyword: RAD
Elevated INR errors	09/21/2022	09/21/2022	Elevated image navigation residuals for all channels in both NS and EW directions were noted after the data gap at 16:00 UTC on 9/21/2022. Presented at the 09/28/2022 CWG meeting by Song Guo and Vladimir Kondratovich. Keyword: INR.
Image navigation anomaly	09/26/2022	10/05/2022	Elevated time-dependent image navigation residuals and distorted images are noted in the channels 7/ 11/ 14 after the change in digitizing options for these channels since 20:02 UTC on 9/26/2022 and lasted until 20:20 UTC on 10/5/2022 when the options returned to the baseline. Image navigation of the other IR channels may also be not quite precise that period because the channel co-registration was affected. Presented at the 09/28/2022 and 10/5/2022 CWG meetings by Song Guo and Vladimir Kondratovich and by Bin Tan and Alan Reth at the 10/5/2022 CWG meeting. Keyword: INR.
Stripe across swath caused by lunar intrusion	11/05/22	11/05/22	Thin stripes were present in select products due to lunar intrusion into the space look during their timelines. Thin striping was caused by a known issue in the enhanced lunar rejection algorithm. The contaminated spacelook observations occurred on 11/05 at 18:04Z impacting the B08 and B09 FD and M1 products with a thin stripe. Details in the CWG meeting on 12/07/2022.Keyword: RAD
B10 BDS updates	09/14/2022	09/14/2022	The B10 BDS map was updated for row#011 on 09/14/2022 to reduce the faint striping in the L1b images from 14:34UTC on 07/05/2022. More details in the CWG meeting slides on 09/16/2022.Keyword: RAD
ABI instrument reset	12/25/2022	12/26/2022	The ABI instrument was unexpectedly reset at ~22:00 UTC on 12/25/2022 and the L1b data was resumed at ~02:00 UTC on 12/26/2022. The detector noise performance at most VNIR and all IR channels was slightly altered after the reset. The barcode artifact (BA) noise as well as the amplitude of the ICT FFT 35hz was reduced at most of the IR channels except for Channel 15. Some of the IR channels show slightly elevated BA diurnal variation after the instrument reset. Details were available in the ABI status report and slides by Xu et al. at the 01/04/2023 CWG meeting. Keyword: RAD.
INR anomaly	11/30/2022	11/30/2022	Elevated image navigation residuals for all channels in both NS and EW directions were noted after the end of data gap at 17:00 UTC on 11/30/2022. Detailed description is in the 12/19/2022 CWG weekly INR report by Song Guo and Vladimir Kondratovich. Keyword: INR.
ABI detector map update	12/14/2022	12/14/2022	ABI detector map was updated at 18:54 UTC. That has led to small changes in INR. These changes should be hardly noticeable in applications. Presented at the 12/21/2022 CWG meeting by Vladimir Kondratovich and Song Guo. Keyword: INR
ABI detector map refinement	12/22/2022	12/22/2022	ABI detector map was refined at 17:41 UTC. That has led to small improvements in INR. These changes should be hardly noticeable in applications. Presented at the 01/04/2023 CWG meeting by Vladimir Kondratovich and Song Guo. Keyword: INR.
ABI B16 radiance anomaly	12/26/2022	12/26/2022	G18 B16 images displayed a drop of ~0.9K@300K radiance at 02:00 - 02:10 UTC on 12/26/2022. This one-time event occurred at the first timeline images after the ABI automatic reset event on 12/25/2022. Reported in the 01/04/2023 CWG meeting. Keyword: RAD.
Partial images	01/04/2023	01/04/2023	Partial full-disk ABI images were distributed at 18:00UTC. Presented at the 1/25/2023 CWG meeting.
B11 striping and BDS update	12/26/22	01/30/2023	Mild striping was seen in the products of B11 beginning on 12/26/2022 at 02:00Z following the resumption of imaging after an anomalous ABI reset. The mild striping was caused by anomalous performance from the detector on row #86. The detector on row 86 was switched with a BDS map update on 01/30/2023 at 21:31Z which resolved the striping. See details in the CWG presentations on 01/11/2023 and 02/15/2023. Keyword: RAD
VNIR FPM temperature maintained at 171K	09/22/2022	01/09/2023	G18 ABI VNIR FPM temperature was increased from ~170K to ~171k on 09/22/2022 and returned to ~170k on 01/09/2023. This “temporarily” raise from 170 K to 171 K was as part of the BA investigation per L3Harris. No apparent change was made to the LWIR/MWIR FPM temperature. Details in the CWG meeting on 01/11/2023. Keyword: RAD
G18 declared as operational GOES-West	01/04/2023	01/04/2023	GOES-18 became operational GOES-West in 137.0W at ~18:00UTC on 01/04/2023. Details in the CWG meeting on 01/11/2023. Keyword: RAD/INR
Striping caused by lunar intrusion	01/13/2023	01/14/2023	Lunar intrusion into the space look was found for the following timelines which could cause errors in calibration for particular swaths and products. The contaminated spacelook observations occurred on 01/13 at 02:22Z impacting the B08 timeline; and on 01/14 at 0305Z impacting the B08 timeline. Details in the CWG meeting on 03/15/2023. Keyword: RAD
Striping caused by lunar intrusion	02/09/2023	02/11/2023	Faint broad stripes were present in select products due to lunar intrusion into the space look during their timelines. The contaminated spacelook observations occurred on 02/09 at 00:21Z impacting the B08 FD and CONUS products; on 02/10 at 0105Z impacting the B08 products; and on 02/11 at 01:38Z impacting the B08 FD CONUS and M2 products. Details in the CWG meeting on 03/15/2023. Keyword: RAD
Striping caused by lunar intrusion	03/07/2023	03/09/2023	Faint broad stripes and strong thin stripes were present in select products due to lunar intrusion into the space look during their timelines. The strong thin stripes were caused by a known issue in the enhanced lunar rejection algorithm. The contaminated spacelook observations occurred on 03/07 at 21:01Z impacting the B08 and B09 FD CONUS and M1 products with a strong thin stripe and broad faint striping; on 03/07 21:10Z impacting the B12 FD and M2 with broad faint stripes; on 03/08 at 2303Z impacting the B08 and B09 FD M1 and M2 products with faint stripes; and on 03/08 at 23:37Z impacting the B08 and B09 FD CONUS and M2 products with faint broad stripes. Details in the CWG meeting on 03/15/2023. Keyword: RAD
IR anomaly at 21:20 UTC	03/07/2023	03/07/2023	G18 B07/08/09/10/14/15/16 channel radiances displayed a sudden channel-dependent change between 21:20-21:30 UTC on 03/07/2023. It was caused by the loss of some spacelook sample signals. Details available in the slides reported in the 03/15/2023 and 03/29/2023 CWG meetings.
Keyword: RAD
VNIR calibration LUTs updates	03/19/2023	03/19/2023	The SCT normal vector and the quadratic terms for B01 and B02 detectors were updated during the solar calibration at 15:17 UTC on 03/19/2023. These LUT updates were to improve the VNIR calibration accuracy and the faint striping over bright convective clouds in the B01 and B02 images. respectively. Keyword: RAD.
Striping caused by lunar intrusion	04/03/2023	04/06/2023	Faint broad stripes and strong thin stripes were present in select products due to lunar intrusion into the space look during their timelines. The strong thin stripes were caused by a known issue in the enhanced lunar rejection (ELR) algorithm. The contaminated spacelook observations occurred on 04/03 at 1910Z impacting the B09 and B10 FD and M1 products with broad faint striping; on 04/04 1933Z impacting the B08 with a strong thin stripe and B09 with faint striping in FD CONUS and M1 products; on 04/05 at 2016Z impacting the B08 FD CONUS and M1 products with faint stripes; and on 04/06 at 2209Z impacting the B08 FD and M2 products with faint broad stripes. Details in the CWG meeting on 04/19/2023. Keyword: RAD
Frequent SPL NEdN outliers after DO.12.01 update	05/23/2023		Frequent SPL NEdN outliers were observed in certain bands on G16/G18 after the update of DO.12.01 on 05/23/2023. e.g. G16 B04/B06/B07/B09/B10/B13. The associated SPL mean value had a small fluctuation of a few counts compared to the normal condition. No apparent striping was observed. The CWG analysis shows that it is related to the failure of sample SPL spike screening after the update of DO.12.01 on 05/23/2023. The ground is working to resolve it. Details in the CWG meeting on 05/31/2023. Keyword: RAD
ICT sample loss	06/21/2023		The first instance of ICT sample count loss was identified in some IR G18 IR bands on 06/21/2023. This anomaly reoccurred intermittently at some IR bands between 06/23/2023 and 06/24/2023
IR swaths loss due to consecutive SPL loss	10/26/2022		FD degradation with two consecutive swaths loss has been identified in the IR images since the issue was monitored in October 2022. This degradation is attributed to the consecutive SPL loss and is caused by a bug in the current operational algorithm. B07 has exhibited this issue more frequently compared to the other IR bands. Details in the CWG meetings on 01/25/2023 and 08/09/2023. Keyword: RAD