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The algorithm was tested by using the Nimbus-5 Electrically Scanning Microwave Radiometer (ESMR-5) and a simple microwave radiative transfer model to retrieve seasonal 5 5 area averaged rainrate over the tropical Atlantic and Pacific. The brightness temperatures were collected and analyzed into histograms for each season and in each grid box. The histograms suggest a normal distribution of background noise plus a skewed rain distribution at the higher brightness temperatures. By using a statistical estimation procedure based upon normally distributed background noise, the rain distribution was separated from the raw histogram. The radiative transfer model was applied to the rain-only distribution to retrieve area-time averaged rainrates throughout the tropics. An adjustment for the beam filling error was incorporated in the procedure. -from Authors
Journal of Applied Meteorology
author list (cited authors)
Shin, K., Riba, P. E., & North, G. R.