GPM_3GPROFF15SSMI: Global Daily Precipitation Grids from Satellite Radiometers

Global gridded daily precipitation averages derived from microwave sensors on the F15 satellite, processed by NASA's GPROF algorithm. The data is a climate-reference product using homogeneous ECMWF-Interim reanalysis for ancillary atmospheric conditions. Version 07 is the current version, superseding all older releases.

Use Cases

• Climate trend analysis based on the climate-referenced, homogeneous time series.
• Precipitation profiling based on microwave sensor retrievals sensitive to liquid and ice hydrometeors.
• Gridded data assimilation for climate models based on the 0.25-degree spatial resolution.
• Comparative studies of precipitation products based on the use of ECMWF-Interim reanalysis data.

Strengths

• Climate-reference product designed for homogeneous analysis over time, using consistent ECMWF-Interim ancillary data.
• Data is from high-quality microwave sensors sensitive to both liquid and ice-phase precipitation.
• Current version is V07, with older versions superseded and unavailable.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and file size are unknown, which may limit suitability assessment.
• Ancillary data from ECMWF-Interim has a 2-3 month lag behind regular production.

Provenance

Source

National Aeronautics and Space Administration (NASA), GES DISC.

Collection Method

Retrievals from the SSMI radiometer on the F15 satellite, processed by the GPROF algorithm.

Time Range

Daily averages; specific temporal coverage is not provided in the input.

Freshness

Last updated 2026-03-13 01:56:06.812490.

Geography

Global coverage at a 0.25 degree x 0.25 degree grid resolution.