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NASA's TRMM_3B42_Daily dataset provides daily accumulated precipitation estimates derived from the research-quality 3-hourly TRMM Multi-Satellite Precipitation Analysis (TMPA). This value-added product is generated by summing valid satellite retrievals over a 24-hour period on a 0.25-degree global grid, with results provided in millimeters. The dataset includes a count of valid retrievals per grid cell, enabling the computation of conditional means for areas with incomplete daily coverage.
This product is discontinued. Users are strongly encouraged to shift to the successor IMERG dataset (doi: 10.5067/GPM/IMERGDF/DAY/06). Data is in netCDF-4 format.