Real time data
Opacity and IWV
MIAWARA - Measurement PrincipleThe instrument measures the intensity of the pressure broadened emission line of water vapour at 22.235 GHz. Due to the exponential decrease of atmospheric pressure with altitude, the broadening of the measured line spectrum contains information from the H2O emission intensity at different altitudes. Therefore we are able to retrieve middle atmospheric water vapour profiles in the range of 25 - 80 km from the measured microwave spectrum using a retrieval algorithm based on Rodgers optimal estimation technique.