GPM SAPHIR PRPS: Satellite-Based Precipitation Profiles at 10 km Resolution

NASA's GPM mission provides precipitation estimates from the SAPHIR radiometer using the Precipitation Retrieval and Profiling Scheme (PRPS). The algorithm generates instantaneous precipitation profiles at a 10-kilometer resolution, independent of dynamic model data. Version 6 is the current dataset, superseding all older versions.

Use Cases

• Validate passive microwave precipitation retrievals based on the core GPM observatory calibration concept.
• Analyze precipitation error estimates and data quality flags provided for each retrieval.
• Study climatological precipitation trends using model-independent data designed for long-term scales.
• Generate near real-time precipitation estimates where access to model data is limited.

Strengths

• Provides a best estimate of precipitation based on matched SAPHIR-DPR observations.
• Algorithm is independent of dynamic model data, advantageous for near real-time and climatological analysis.
• Generates data at a constant 10-kilometer resolution for all scan positions.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Limitations of the DPR instrument are transferred through the retrieval scheme to the resulting products.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Satellite radiance measurements from the GPM SAPHIR instrument processed by the PRPS algorithm.

Time Range

Temporal coverage is not specified in the provided metadata.

Freshness

Last updated 2026-03-13 01:56:40.251917; freshness should be verified.

Geography

Global spatial coverage from satellite observations.