Brightness temperatures for GPM GMI, and TRMM TMI, PR and VIRS

The Level 1B algorithm and software transform Level 0 counts into geolocated and calibrated antenna temperatures (Ta) and brightness temperatures (Tb). Ta is obtained by utilizing the sensor radiometric calibration as well as various corrections based on after launch analyses. Tb is derived from Ta after antenna pattern correction (APC) and along scan corrections. 

Processing Level
Current Algorithm Version
Dates Covered
December 1997 - April 2015 (TRMM), March 2014 - Present (GPM)
Minimum Latency
20 minutes (near real-time); 6 hours (research)
Spatial Resolution
Varies by satellite and instrument channel