There are a number of efforts to compare and validate TRMM rainfall products with other rainfall measurements. In this study, we compare a high density rain gauge dataset over Thailand (only land part) with two TRMM Level 3 rainfall products: 3B42 which is a calibrated geosynchronous IR rain rate using TRMM estimates and 3B43 which merges satellite data from TRMM, geosynchronous IR, SSM/I, and rain gauges. Because of the high spatial and temporal resolution, 3B42 is the most used TRMM product for operational users. It is necessary to quantify the biases of the TRMM products relative to gauge measurements that have been used historically to calibrate hydrologic models. In addition, the comparison of Thailand rain gauges and the global precipitation climate centre (GPCC) analysis is also being presented.
II. DATA
A. Thailand
There are a number of efforts to compare and validate TRMM rainfall products with other rainfall measurements. In this study, we compare a high density rain gauge dataset over Thailand (only land part) with two TRMM Level 3 rainfall products: 3B42 which is a calibrated geosynchronous IR rain rate using TRMM estimates and 3B43 which merges satellite data from TRMM, geosynchronous IR, SSM/I, and rain gauges. Because of the high spatial and temporal resolution, 3B42 is the most used TRMM product for operational users. It is necessary to quantify the biases of the TRMM products relative to gauge measurements that have been used historically to calibrate hydrologic models. In addition, the comparison of Thailand rain gauges and the global precipitation climate centre (GPCC) analysis is also being presented.
II. DATA
A. Thailand
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