The spectrometer covers the spectral range from the edge of the thermal infrared at 3.62 µm (2760 cm-¹), where solar backscatter begins to contribute, up to 15.5 µm (645 cm-¹) covering the peak of the thermal infrared and particularly the intense CO2 band around 666 cm-¹.
Most of the information required by users is contained in the primary spectral regions inside this IASI spectral range.
Spectral range
Primary application
650 to 770 cm-1
Temperature sounding (CO2 band)
770 to 980 cm-1
Surface and cloud properties
1000 to 1070 cm-1
O3 sounding
1080 to 1150 cm-1
Surface and cloud properties
1210 to 1650 cm-1
Water vapour temperature sounding: N2O, CH4 and SO2
