The Infrared Sounder will be the first hyperspectral sounding instrument in geostationary orbit. It comprises a complex imaging spectrometer that can detect the distribution, circulation and temperature of water vapour in the atmosphere.
Using interferometric techniques in two spectral bands (longwave infrared and mid-wave infrared) with a spectral resolution of 0.625 cm-1 and a spatial resolution of 4 x 4 km, it will support nowcasting applications. It will significantly improve early detection (and warning) of developing convective storms by delivering profiles on the distribution, circulation and temperature of atmospheric water vapour in three dimensions.
In addition, layer-by-layer analysis of the atmosphere will also offer greater insight into its complex chemical composition, and support atmospheric chemistry applications, such as air-quality monitoring.