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Field campaign of observing precipitation in the 2004 rainy season of Okinawa, Japan

To improve the rain retrieval algorithms for spaceborne microwave radiometers, it is imperative to improve the microphysics model and the rain distribution models used in these algorithms. In the 2004 rainy season in Japan, a field campaign of observing precipitation in Okinawa (okn-baiu04) was conducted as part of the global satellite mapping of precipitation (GSMaP) project. One of the important observations from okn-baiu04 was simultaneous measurement of precipitation with COBRA (CRL Okinawa bistatic polarimetric radar, C-band), a 400-MHz wind profiler (WPR), and groundbased measurements of the rain drop size distribution (DSD).