Satellite Weather Radar.
AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MASS
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The problem of making radar measurements of meteorological phenomena such as rainfall, clouds, and ice crystal formation from a satellite is discussed. The main problem areas are obtaining sufficient signal-to-noise ratio within the weight limitation of the satellite system and avoiding ground clutter when scanning any significant angle off nadir. Sufficient signal-to-noise ratio to detect heavy rainfall at 35 GHz is available for a downlooking only system within the weight power limitation of the Military Meteorological Satellites. An arrested aperture doppler system to reject ground clutter at large scan angles off nadir while detecting rainfall by doppler due to its vertical motion is suggested.