Suomi NPP Day Night Band image - Alaska, 3/29/2016 - click to enlarge
Imagery
Team Lead: Bill Line
Product Description
Imagery enables weather forecasters to discern environmental phenomena (by either manual analysis or automated algorithms) within the visible, near-infrared and infrared, portions of the spectrum. Imagery is also used as digital input to remote sensing algorithms which produce other environmental measurements. Imagery is required by meteorologists to verify the validity and accuracy of numerical weather prediction analyses and forecasts.
VIIRS EDR Imagery:
- Geo-spatial mapping: remapped to the Ground Track Mercator (GTM) grid, eliminating overlapping pixels and bowtie deletions
- Visible and IR bands: radiances, and brightness temperatures or reflectances
- Day/night band (NCC Imagery): a pseudo-albedo derived from the DNB by normalizing the large radiance contrast in DNB from day to night
- All imagery is terrain-corrected
VIIRS Imagery EDR is a Priority 1 product:
- Key Performance Parameters (KPPs) Imagery bands: I1, I3, I4, I5, M14, M15, M16, and DNB/NCC
- KPP: For latitudes greater than 60 N in the Alaskan region
- non-KPP Imagery bands: I2, M1, M4, M9
Product and Data Access
VIIRS Imagery EDRs:
| VIIRS Band | Wavelength (µm) | Spatial Resolution Nadir/Edge-of-Scan (km) | |
|---|---|---|---|
| KPP Imagery bands | I1 | 0.60 - 0.68 | 0.4/0.8 |
| I3 | 1.58 - 1.64 | 0.4/0.8 | |
| I4 | 3.55 - 3.93 | 0.4/0.8 | |
| I5 | 10.5 - 12.4 | 0.4/0.8 | |
| M14 | 8.4 - 8.7 | 0.8/1.6 | |
| M15 | 10.263 - 11.263 | 0.8/1.6 | |
| M16 | 11.538 - 12.488 | 0.8/1.6 | |
| DNB (NCC Imagery) | 0.5 - 0.9 | 0.8 | |
| non-KPP Imagery bands | I2 | 0.846 - 0.885 | 0.4/0.8 |
| M1 | 0.402 - 0.422 | 0.8/1.6 | |
| M4 | 0.545 - 0.565 | 0.8/1.6 | |
| M9 | 1.371 - 1.386 | 0.8/1.6 |
Users
- Colorado School of Mines Earth Observation Group
- Alaska and other NWS users; AWIPS
- NIC, NHC, JTWC, US State Department/foreign governments