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On the measurement of precipitation frequencies by passive microwave radiometeryOver most of the microwave spectrum, raindrops both absorb and scatter radiation producing large changes in brightness temperatures relative to clear or cloudy conditions. Since the structure of rain varies substantially for different rain rates and climatological backgrounds, the raindrop size distribution, the rain layer thickness and the ice clouds above the rain layer are all important inputs to the model computations. The subsequent modeling involves applying the Mie theory to derive the absorption and scattering effects and the radiative transfer calculation is based upon a variational iterative approach which takes account of the multiple scattering effect of the rain layer. Results over both ocean and land backgrounds are demonstrated. It is also demonstrated that by using discrimination tests of the radiometric data, the rain/no rain decision can be made and the rainfall rate can be retrieved from a statistical inversion technique.
Document ID
19830017032
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kidder, S. Q.
(Illinois Univ. Urbana, IL, United States)
Date Acquired
August 11, 2013
Publication Date
October 1, 1981
Publication Information
Publication: NASA. Goddard Space Flight Center Precipitation Meas. from Space:
Subject Category
Meteorology And Climatology
Accession Number
83N25303
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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