| Satellites |
SNPP (Launched 28 Oct 2011), NOAA-20 (Launched 18 Nov 2017),
NOAA-21 (Launched 10 Nov 2022). |
| Mission |
High vertical resolution Temperature and Water Vapor profiles.
Coarse ozone profile, total column or gross profile for a number of
other species, such as Methane, Carbon Monoxide, Carbon Dioxide,
Nitric Acid, Sulphur Dioxide, Ammonia, and Dust Aerosols. |
| Main Features |
- Spectral resolution: 0.625 cm-1 (unapodized) when
operating at Full Spectral Resolution (FSR).
- On December 4, 2014,
CrIS transition from Truncated Spectral Resolution (TSR) to FSR.
- Spectral range:
- 650 - 1095 cm-1 (LWIR),
- 1210 - 1750 cm-1 (MWIR),
- 2155 - 2550 cm-1 (SWIR)
- Number of channels per band at FSR:
- 717 (LWIR),
- 869 (MWIR),
- 637 (SWIR)
- Total channels:
2223 (unapodized)
|
| Scanning Technique: |
- Cross-track: 30 steps Fields of Regard (FOR) separated by 48 km at nadir;
- Swath width: 2200 km (+/- 48.3° with 3.3° step angle);
- Along track: A single scan line every 8 seconds
|
| Coverage/Cycle: |
Near-global coverage twice per day. Sun-synchronous orbit
with an inclination of 98.7° and a mean period of 101 min (about 14 orbits/day). |
| Spatial Resolution: |
Field of view (FOV): 9 FOVs, each 14 km diameter at nadir
contained within a 48 x 48 km2 FOR (average FOR sampling
distance 48 km). |
| Resources |
Mass: 145.6 kg for SNPP, and 144.6 kg for NOAA-20.
Average Power: < 117 W (110 W for SNPP and 102 W for NOAA-20).
Average/Peak Data Rate: 2.42/2.83 Mbps for SNPP, 2.50/2.92 NOAA-20 (after onboard processing). |
| Instrument Type: |
Fourier Transform Spectrometer based on the
Michelson interferometer configuration. |
| More Details: |
CrIS instrument |
