The Moon as Possible Calibration Reference for Microwave Radiometers

Martin Burgdorf, Stefan B├╝hler, Imke Hans, T. Lang, S. Michel
Publication type: 
Publication status: 
Instruments on satellites for Earth observation on polar orbits usually employ a two-point calibration technique, in which deep space and an on-board calibration target provide two reference flux levels. As the direction of the deep space view is close to the celestial equator, the Moon moves sometimes through the field of view and introduces an unwelcome additional signal. One can take advantage of this intrusion, however, by using the Moon as a third flux standard for stability analysis of microwave sensors. This method is relevant for FIDUCEO, a project producing fundamental climate data records with traceable estimates of stability and thereby enhanced credibility.