Abstract
Abstract The impact of spatial resolution enhancement on estimates of tropical typhoon rainfall based on SSM/1 (Special Sensor Microwave/Imager) measurements is evaluated with six different microwave precipitation retrieval algorithms. Passive microwave estimates of rainfall are susceptible to errors from nonhomogeneous beam filling. The SSMIX ground footprints for the 19-, 22-, and 37-GHz channels have considerable overlap, and thus deconvolution techniques can be applied to enhance spatial resolution of measurements at those frequencies. The authors utilize a Backus-Gilbert matrix transform approach to accomplish the deconvolution so as to minimize noise amplification, as suggested by Stogryn. The deconvolution scheme is evaluated in terms of its impact on rain rates throughout the life cycles of seven tropical cyclones that occurred during the 1987 hurricane and typhoon season. The evaluation was performed on a single-frequency emission-based algorithm, a single- frequency scattering-based algorithm, t...
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