GPM GMI Brightness Temperatures: Satellite Calibrated Measurements

NASA's Global Precipitation Measurement mission provides calibrated brightness temperatures for 13 channels from the GMI instrument. Version 07 is the current data version, superseding older releases. The algorithm uses a non-linear three-point in-flight calibration and antenna pattern corrections to derive geolocated brightness temperatures.

Use Cases

• Calibrating satellite sensor measurements based on the described non-linear three-point in-flight calibration.
• Monitoring sensor non-linearity using noise diode measurements as described.
• Deriving geolocated brightness temperatures for atmospheric analysis based on the Level 0 count transformation process.
• Providing a hot load back-up calibration for sensor data continuity as mentioned in the description.

Strengths

• Version 07 is the current, authoritative version, superseding older data.
• Algorithm provides calibrated brightness temperatures for 13 distinct GMI channels.
• Includes a hot load back-up calibration mechanism for data reliability.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• File formats include BIN and ISO, which may require specialized tools for processing.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Satellite remote sensing via the GPM GMI instrument, processed using the 1BGMI algorithm.

Freshness

Last updated 2026-03-13 02:07:45.756994; freshness should be verified.

Geography

Global coverage from satellite observations.