GPM IMERG: Global Monthly Precipitation Estimates at 0.1-Degree Resolution

GPM IMERG Final Precipitation L3 Version 07B is the unified U.S. algorithm providing multi-satellite precipitation estimates for the Global Precipitation Measurement (GPM) mission. The data merges passive microwave and infrared satellite observations using a Morphing-Kalman Filter scheme, producing monthly gridded fields at a 0.1°x0.1° (roughly 10 km) resolution. This dataset is produced by NASA and was last updated in March 2026.

Use Cases

• Modeling long-term global hydrological cycles based on gridded monthly precipitation estimates.
• Validating climate model outputs against satellite-derived precipitation data.
• Analyzing regional precipitation trends and anomalies using the high-resolution 0.1-degree grid.
• Studying the integration of multi-sensor data (microwave and infrared) for weather and climate applications.

Strengths

• Utilizes a unified algorithm (IMERG) that intercalibrates data from multiple satellite sensors within the GPM constellation.
• Provides data at a high spatial resolution of 0.1°x0.1° (approximately 10 km).
• Incorporates bias correction against the monthly Global Precipitation Climatology Project (GPCP) Satellite-Gauge product over high-latitude ocean.
• Data is produced by NASA, an authoritative source for Earth science observations.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for specific modeling tasks.
• The description is highly technical; understanding the data's generation method requires domain expertise.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Satellite data retrieval from the GPM constellation, processed using the Integrated Multi-satellitE Retrievals for GPM (IMERG) algorithm with inputs from passive microwave sensors, infrared data, and reanalysis models.

Time Range

Monthly data, temporal coverage is not explicitly stated in the provided input.

Freshness

Last updated 2026-03-13 01:57:16.724346; freshness should be verified.

Geography

Global coverage.