Abstract
The evaluation of rain retrieval algorithms for spaceborne microwave radiometers, especially for the TRMM Microwave Imager (TMI), with instantaneous observation data is shown in this paper. The basic idea of the evaluation is to use the rain rate and the bright band (BB) height data from Precipitation Radar (PR) onboard TRMM to see the relationship between TMI observables (brightness temperatures) and rain rate from PR (or TMI) for fixed freezing height (BB height). Also the non-uniform beam filling (NUBF) parameters, such as stratiform pixel ratio and standard deviation of path integrated attenuation (PIA), are used for the analysis.
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