dataset · Global
GPM: Global Precipitation Measurement (GPM) Release 07
Global Precipitation Measurement (GPM) is an international satellite mission to provide next-generation observations of rain and snow worldwide every three hours. The Integrated Multi-satellitE Retrievals for GPM (IMERG) is the unified algorithm that provides rainfall estimates combining data from all passive-microwave instruments in the GPM Constellation. This algorithm is intended to intercalibrate, merge, and interpolate all satellite microwave precipitation estimates, together with microwave
Visit source ↗Source details
Licence: proprietary
Evidence quality: 29.7
Listed in gee public catalogue API on 2026-10-16; relevance/value screened (haiku).
Metadata checked: 2026-10-14T13:20:00.000Z
What's in it
- Data offered docs-verified
- precipitation (mm/hr, merged PMW) · IR precipitation · uncalibrated snapshot precipitation · PMW precipitation source sensor ID · IR influence weight (%) · probability of liquid precipitation (%) · calibrated precipitation random error · PMW observation time within half hour · quality information
- Coverage docs-verified
- Global · 1998-01-01 to 2026-10-14 (per dataset availability metadata)
- Resolution docs-verified
- 30-minute temporal; 11132 m (~11 km, ~0.1°) pixel
- Update frequency llm-inferred
- Provisional products regularly replaced with updated versions when data become available; no fixed interval stated
- Formats docs-verified
- Google Earth Engine ImageCollection
- Access docs-verified
- Free: NASA GPM data freely available for public use; accessed via Google Earth Engine, which requires registration and is free for research, education and nonprofit use
Useful for
- Use cases llm-inferred
- Event rainfall totals and intensities for FRA design storm checks where no local gauge exists · Historic half-hourly rainfall series as inputs to drainage strategy or storm-event analysis · Regional rainfall pattern mapping for catchment hydrology screening · Climate-context rainfall trend checks for water resources or environmental baseline reports
- Audience llm-inferred
- flood consultants · hydrologists · drainage engineers · water resources engineers · GIS analysts · climate risk consultants
Limitations
- Constraints llm-inferred
- Provisional products are replaced as updates arrive; no 'permanent' products are available beyond 2025/09/30 due to the planned transition to version 8 · Satellite-derived estimates with varying quality; use the quality and random error bands to assess reliability · ~11 km pixel is coarse for small catchment or urban drainage inputs · Docs summary says data is available 2000 to 2025, but availability metadata starts 1998; verify coverage before relying on it · ENTRY licence field says 'proprietary', which conflicts with docs stating free public use; check licence before commercial reuse · Earth Engine use is documented as free for research, education and nonprofit use; commercial use terms are not covered in the docs
Evidence
- ee.ImageCollection('NASA/GPM_L3/IMERG_V07')
- https://developers.google.com/earth-engine/datasets/catalog/NASA_GPM_L3_IMERG_V07
Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.