July 1, 1981

National Aeronautics and Space Administration NASA

Jet Propulsion Laboratory California Institute of Technology Pasadena, California

This report presents a general review of cloud types, water particle densities, radiative transfer, attenuation and noise temperature calculations, and examples of basic link signal-to-noise ratio calculations. The results of calculations for twelve different cloud models are presented for frequencies of from l to 50 GHz and elevation angles of 30-degrees and 90-degrees.