The Goddard Earth Sciences Data and Information Services Center (GES DISC), in coordination with the Global Precipitation Measurement (GPM) mission and the Precipitation Processing System (PPS), is pleased to announce the availability of the Global Precipitation Mission (GPM) Level-1 orbital GPM Microwave Imager (GMI) and Partner Radiometer data from the GES DISC archive. Launched on February 27, 2014, GPM is an international network of satellites that provide next-generation global observations of rain and snow. The Level 1 orbital data consist of products from GMI, and the partner radiometers: the Tropical Rainfall Measuring Mission Microwave Imager (TMI); the Advanced Technology Microwave Sounder (ATMS); the Microwave Humidity Sounder (MHS); the Sondeur Atmosphérique du Profil d'Humidité Intertropicale par Radiométrie (SAPHIR); the Advanced Microwave Scanning Radiometer 2 (AMSR2); and the Special Sensor Microwave/Imager (SSMI) series. The GPM GMI is used as the reference standard to ensure consistency among global precipitation retrieval and climate studies.
The released data products are:
|GES DISC Shortname |
|Long Name |
|GPM_1AGMI ||GPM GMI Level 1A unpacked packet data |
|GPM_1BGMI ||GPM GMI Level 1B Brightness Temperatures |
|GPM_1CF16SSMIS ||GPM, SSMI F16 Level 1C Common Calibrated Brightness Temperatures |
|GPM_1CF17SSMIS ||GPM, SSMI F17 Level 1C Common Calibrated Brightness Temperatures |
|GPM_1CF18SSMIS ||GPM, SSMI F18 Level 1C Common Calibrated Brightness Temperatures |
|GPM_1CGCOMW1AMSR2 ||GPM, AMSR2 GCOMW1 Level 1C Common Calibrated Brightness Temperature |
|GPM_1CGPMGMI ||GPM GMI Level 1C Common Calibrated Brightness Temperatures Collocated |
|GPM_1CGPMGMI_R ||GPM GMI Level 1C R Common Calibrated Brightness Temperatures Collocated |
|GPM_1CMETOPAMHS ||GPM, METOPA MHS Level 1C Common Calibrated Brightness Temperatures |
|GPM_1CMETOPBMHS ||GPM, METOPB MHS Level 1C Common Calibrated Brightness Temperatures |
|GPM_1CMT1SAPHIR ||GPM, MT1 SAPHIR Level 1C Common Calibrated Brightness Temperatures |
|GPM_1CNOAA18MHS ||GPM, NOAA-18 MHS Level 1C Common Calibrated Brightness Temperatures |
|GPM_1CNOAA19MHS ||GPM, NOAA-19 MHS Level 1C Common Calibrated Brightness Temperatures |
|GPM_1CNPPATMS ||GPM, NPP ATMS Level 1C Common Calibrated Brightness Temperatures |
|GPM_1CTRMMTMI ||GPM, TRMM TMI Level 1C Common Calibrated Brightness Temperatures |
|GPM_BASEGPMGMI ||GPM Level 1BASE Common Calibrated Brightness Temperatures |
You can access the data through the Data Holdings Web Interface
, which contains access to the data, documentation and services for each product. You can also access the products directly through the following:
Figure 1 is a sample of the GPM_1CGPMGMI product (1C.GPM.GMI.XCAL2014-N.20140611-S171129-E184401.001619.V03A.HDF5), showing brightness temperatures for Tropical Cyclone Nanauk over the Arabian Sea on June 11, 2014.
Figure 1. GMI brightness temperatures at 89 GHZ (data file: 1C.GPM.GMI.XCAL2014-N.20140611-S171129-E184401.001619.V03A.HDF5), showing Tropical Cyclone Nanauk over the Arabian Sea on June 11, 2014.
Caveats For Use of GPM GMI and Partner L1 Data 6/16/2014 (from the Precipitation Processing System, PPS):
This is not the final data stream. As such, we would like for all Users to keep the following in mind while using the data.
- Intercalibration of the 1C products from partner radiometers is still being done with the at-launch approach which uses TMI as the calibration reference standard. That is, TMI and GMI currently have different absolute calibrations.
- Some RFI and moon intrusions into the cold load are still being worked on. Other issues may also be present, so Science Team members are urged to immediately report any artifacts in the data.
- Users should refrain from publishing using this data, as it is likely to change. Reprocessed data will be made available with a more refined calibration in September 2014.
The next datasets to be released include GPM and partner Level 2 and Level 3 GPROF data that contain surface rainfall and hydrometeor profiles (pixel by pixel) from radiometer brightness temperature data (in this release) using the Goddard Profiling algorithm GPROF2014. These data are scheduled to be released from GES DISC later this summer.
For further reading: