THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – INSTRUMENT SUMMARY - IASI -
Full Name Infrared Atmospheric Sounding Interferometer Status Operational
Instrument Agencies EUMETSAT, CNES Maturity
Instrument Type Atmospheric temperature and humidity sounders and Atmospheric chemistry Geometry Cross-track scanning
Instrument Technology Medium-resolution IR spectrometer Sampling Sounding
Data Access Open Access Data Format Native and BUFR
Measurements and Applications 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.
Resolution Summary Vertical: 1 - 30 km, Horizontal: 25 km
Swath Summary 2052 km
Accuracy Summary Temperature: 0.5 - 2 K, specific humidity: 0.1 - 0.3 g/kg, ozone, trace gas profile: 10%
Waveband Summary MWIR - TIR: 645 to 2760 cm-1 or 3.62 - 15.5 µm (8461 spectral samples)
MWIR (~3.0 µm - ~6.0 µm)
TIR (~6.0 µm - ~15.0 µm)
Instrument Measurements
CategoryParameterAccuracy
Atmospheric Humidity FieldsAtmospheric specific humidity (LT, HT, LS, HS&M) 
Atmospheric Temperature FieldsAtmospheric temperature (LT, HT, LS, HS&M) 
Atmospheric temperature (at surface) 
Cloud type, amount and cloud top temperatureCloud top temperature 
OzoneOzone profile 
Radiation budgetUpwelling (Outgoing) long-wave radiation at TOA 
Downwelling (Incoming) long-wave radiation at the Earth surface 
Upwelling (Outgoing) long-wave radiation at Earth surface 
Long-wave Earth surface emissivity 
Surface temperature (land)Land surface temperature 
Surface temperature (ocean)Sea surface temperature 
Trace gases (excluding ozone)Atmospheric Chemistry - CH4 (TC)0.9 [%]
Atmospheric Chemistry - CO2 (column/profile)2 [ppm]
Atmospheric Chemistry - CO (TC) 
Atmospheric Chemistry - N2O (TC) 
Instrument Missions
Metop-A - Meteorological Operational Polar Satellite - A (2006 - 2019)
Metop-B - Meteorological Operational Polar Satellite - B (2012 - 2024)
Metop-C - Meteorological Operational Polar Satellite - C (2018 - 2023)
Copyright CEOS | About | Site Search Researched and written by Symbios