GPM GMI Satellite Brightness Temperature Measurements

Version 07 data provides calibrated brightness temperatures for 13 channels of the Global Precipitation Measurement Microwave Imager. The algorithm uses a non-linear three-point in-flight calibration to derive antenna temperature, converting it to brightness temperature using antenna pattern corrections. This Level 1B dataset is produced by the GES DISC organization.

Use Cases

• Train models to predict precipitation intensity by analyzing brightness temperature patterns across the 13 GMI channels.
• Perform sensor calibration monitoring by analyzing trends in the noise diode measurement data used for the four-point calibration.
• Develop geospatial anomaly detection algorithms for atmospheric phenomena using the 13 km resolution gridded brightness temperature data.
• Validate radiative transfer models by comparing simulated brightness temperatures against the calibrated Tb values for each channel.

Strengths

• Current Version 07 data supersedes all older versions, ensuring the latest calibration and processing.
• Provides data for 13 distinct GMI channels, enabling multi-spectral analysis.

Limitations

• Specific temporal coverage, spatial extent, and data volume (rows, size) are not provided in the input.
• The description lacks details on potential data gaps, noise characteristics, or validation status against ground truth.

Provenance

Source

GES DISC (Goddard Earth Sciences Data and Information Services Center).

Collection Method

Derived from Level 0 instrument counts via the 1BGMI algorithm, which applies geolocation, non-linear calibration, and antenna pattern corrections.

Geography

Global coverage from the GPM satellite's orbit, with a spatial resolution of 13 km.