The Atmospheric Infrared Sounder (AIRS) is an advanced sounder containing 2378 infrared channels and four visible/near-infrared channels, aimed at obtaining highly accurate temperature profiles within the atmosphere plus a variety of additional Earth/atmosphere products. AIRS is the highlighted instrument in the AIRS/AMSU-A/HSB triplet centered on measuring accurate temperature and humidity profiles throughout the atmosphere.
- High-spectral resolution, grating multispectral infrared sounder operated in a cross-track-scanning mode with AMSU-A and HSB for all weather capabiity.
- Measure's the Earth's outgoing radiation at 0.4 to 1.0 µm and 3.7 to 15.4 µm.
- 1 K temperature retrieval accuracy per 1 km layer in the troposphere.
- 0.05 emissivity accuracy.
- Array grating spectrometer (3.74 to 15.4 µm), with a spectral resolution of 1200 (λ / Δλ)
|Responsible Center:||Jet Propulsion Laboratory|
|Heritage:||Advanced Moisture and Temperature Sounder (AMTS) Study, High Resolution Infrared Radiation Sounder (HIRS)|
|Spatial Resolution:||13.5 km at horizontal at nadir, 1 km vertical|
|Data Rate:||1.44 Mbps|
|Thermal Control By:||Redundant 60 K Stirling cycle coolers, heater, mini thermal bus, two-stage radiator|
|Thermal Operating Range:||20-25°C|
|Field of View (FOV):||±49.5°|
|Instrument Instantaneous FOV:||1.1Å° circular|
|Pointing Requirements (platform+instrument, 3σ)|
|Physical Size:||139.7 x 77.5 x 76.2 cm (stowed), 139.7 x 151.2 x 76.2 cm (deployed)|