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Description
The new version of these data is in GPM-like format (consistent with the GPM Dual-frequency Radar data format), and can be found under the name GPM_2APR.
The TRMM Precipitation Radar (PR), the first of its kind in space, is an electronically scanning single-frequency radar, operating at 13.8 GHz that measures the 3-D rainfall distribution over both land and ocean, and defines the layer depth of the precipitation.
PR 2A23 produces a rain/no-rain flag. Its main objectives are (1) to detect bright band (BB), (2) to classify rain type, and (3) to detect warm rain.
2A23 uses two different methods for classifying rain type: (1) vertical profile method (V-method) and (2) horizontal pattern method (H-method). Both methods classify rain into three categories: stratiform, convective, and other. To make the results user-friendly, 2A23 outputs a unified rain type. Further information about 2A23 can be found in Awaka et al. (1998).
Pre-Boost (before 7 August 2001): Temporal Resolution: 91.5 min/orbit ~ 16 orbits/day; Swath Width: 215 km; Horizontal Resolution: 4.3 km
Post-Boost (after 24 August 2001): Temporal Resolution: 92.5 min/orbit ~ 16 orbits/day; Swath Width: 247 km; Horizontal Resolution: 5.0 km
Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/TISL/GESDI
Concept ID
C1282060545-GES_DISC
Data State
COMPLETE
Number of Files/Granules
96450
Processing Level
2
Published
Updated
Science Keywords
Rain
Citation
Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.
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Awaka, J. (2011). TRMM Precipitation Radar Rain Characteristics L2 1.5 hours V7 (TRMM_2A23) at GES DISC [Data set]. NASA Goddard Earth Sciences Data and Information Services Center. https://doi.org/10.5067/28T2OXCSS4AG Date Accessed: 2026-05-23
Awaka, Jun. “TRMM Precipitation Radar Rain Characteristics L2 1.5 Hours V7 (TRMM_2A23) at GES DISC.” NASA Goddard Earth Sciences Data and Information Services Center, 2011. doi:10.5067/28T2OXCSS4AG. Date Accessed: 2026-05-23
Awaka, Jun. TRMM Precipitation Radar Rain Characteristics L2 1.5 Hours V7 (TRMM_2A23) at GES DISC. NASA Goddard Earth Sciences Data and Information Services Center, 2011, doi:10.5067/28T2OXCSS4AG. Date Accessed: 2026-05-23