GPM PR on TRMM Precipitation Statistics: Daily Gridded Radar Data

GPM_3PRD is a NASA-produced daily gridded precipitation dataset derived from TRMM Precipitation Radar (PR) measurements. Version 07 supersedes all older versions and provides statistics at a 0.25x0.25 degree horizontal resolution, covering latitudes from 67°S to 67°N. The dataset calculates daily probabilities of occurrence, means, and standard deviations for rain and other precipitation-related quantities.

Use Cases

• Modeling daily precipitation probability based on conditional statistics mentioned in the description
• Analyzing spatial patterns of stratiform rain based on bright-band presence conditioning
• Comparing radar-derived rain rates with other satellite products using the daily gridded format
• Studying precipitation variability in the tropics and mid-latitudes based on the 67°S to 67°N coverage

Strengths

• Version 07 is the current and authoritative version, superseding all older data
• Provides daily statistics at a consistent 0.25x0.25 degree horizontal resolution
• Calculates four specific types of statistics: probabilities, means, and standard deviations conditioned on precipitation events

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment
• Areas beyond ±40 degrees latitude are padded with empty grid cells, reducing data coverage in polar regions

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Derived from TRMM Precipitation Radar (PR) level 2 output products via a gridding algorithm.

Freshness

Last updated 2026-03-13 01:57:13.318613; freshness should be verified

Geography

Global coverage from 67°S to 67°N latitude, with padded empty cells beyond ±40°.