| Instrument | Agency | Missions | Status | Type | Measurements &
applications | Technical characteristics |
AIRS
Atmospheric Infra-red Sounder | NASA | Current: Aqua
Future: -
Complete: - | Operational | Atmospheric temperature and humidity sounders | High spectral resolution measurement of temperature and humidity profiles in the atmosphere. Long-wave Earth surface emissivity. Cloud diagnostics. Trace gas profiles. Surface temperatures. |
| Waveband: | VIS - TIR: 0.4 - 1.7 µm, 3.4 - 15.4 µm, Has approximately 2382 bands from VIS to TIR
VIS, NIR, MWIR, TIR |
| Spatial resolution: | 1.1 degree (13 x 13 km at nadir)
Best resolution: 13000 m |
| Swath width: | +/-48.95 degrees |
| Accuracy: | Humidity: 20%, Temperature: 1 K |
| Data Access: | Open Access |
| Data Format: | HDF-EOS |
|
CrIS
Cross-track Infrared Sounder | NOAA | Current: NOAA-21
Future: JPSS-3, JPSS-4, Suomi NPP, NOAA-20
Complete: - | Operational | Atmospheric temperature and humidity sounders | Daily measurements of vertical atmospheric distribution of temperature, moisture, and pressure. MWIR non-operational on Suomi NPP effective 12 July 2021. |
| Waveband: | MWIR - TIR: 3.92 - 4.4 µm, 5.7 - 8.62 µm, 9.1 - 14.7 µm, 1300 spectral channels
MWIR, TIR, FIR |
| Spatial resolution: | IFOV 14 km diameter, 1 km vertical layer resolution
Best resolution: 14000 m |
| Swath width: | 2200 km |
| Accuracy: | Temperature profiles: to 0.9 K, Moisture profiles: 20 - 35%, Pressure profiles: 1% |
| Data Access: | Open Access |
| Data Format: | HDF5 |
|
IASI
Infrared Atmospheric Sounding Interferometer | EUMETSAT (CNES) | Current: Metop-B, Metop-C
Future: -
Complete: Metop-A | Operational | Atmospheric temperature and humidity sounders and atmospheric chemistry | Measures tropospheric moisture and temperature, column integrated contents of ozone, carbon monoxide, methane, nitrous oxide and other minor gases which affect tropospheric chemistry. Also measures sea surface and land temperature. |
| Waveband: | MWIR - TIR: 645 to 2760 cm-1 or 3.62 - 15.5 µm (8461 spectral samples)
MWIR, TIR |
| Spatial resolution: | Vertical: 1 - 30 km, Horizontal: 25 km
Best resolution: 25000 m |
| Swath width: | 2052 km |
| Accuracy: | Temperature: 0.5 - 2 K, specific humidity: 0.1 - 0.3 g/kg, ozone, trace gas profile: 10% |
| Data Access: | Open Access |
| Data Format: | Native and BUFR |
|