There are several sources for downloading and viewing data which allow you to subset the data to only include specific parameters and/or geographic locations. These include the GES DISC, Giovanni and STORM. In Giovanni you can obtain data for a specific country, U.S. state, or watershed by using the "Show Shapes" option in the "Select Region" pane.
Data
Thursday, September 13, 2018
Precipitation data from the GPM and TRMM missions are made available free to the public in a variety of formats from several sources at NASA Goddard Space Flight Center. This section outlines the different types of data available, the levels of processing, the sources to download the data, and some helpful tips for utilizing precipitation data in your research.
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How do I get precipitation data for my specific location?
What happened to the TRMM Multi-satellite Precipitation Analysis (TMPA / 3B4x) data products?
The TRMM satellilte has been decommissioned and stopped collecting data in April 2015. The transition from the Tropical Rainfall Measuring Mission (TRMM) data products to the Global Precipitation Measurement (GPM) mission products has completed as of August 2019. The GPM IMERG dataset now includes TRMM-era data from June 2000 to the present, and other TRMM-era data has been reprocessed with GPM-era algorithms and is now available on the GPM FTP servers. TMPA data production ended as of December 31st, 2019 and the TRMMOpen FTP server has been shut down. Historical TMPA data is still available to download from the NASA GES DISC at: https://disc.gsfc.nasa.gov/datasets?keywords=TMPA&page=1
Click here for more details on the transition from TMPA to IMERG.
Am I allowed to use GPM data for my research?
Yes, in line with NASA's general data policy. Please refer to the GPM Data Policy for further details.
How do I give credit for using GPM data?
Where can I find detailed documentation on the precipitation algorithms?
Browse our directory of GPM & TRMM data products to locate your desired algorithm, then click on the links in the algorithm description under "Documentation". All documentation is also available at the Precipitation Processing System website.
What is the spatial and temporal resolution of GPM data?
The resolution of Level 0, 1, and 2 data is determined by the footprint size and observation interval of the sensors involved. Level 3 products are given a grid spacing that is driven by the typical footprint size of the input data sets.
For our popular multi-satellite GPM IMERG data products, the spatial resolution is 0.1° x 0.1° (or roughly 10km x 10km) with a 30 minute temporal resolution.
Visit the directory of GPM & TRMM data products for details on the resolution of each specific products.
Can I use images or videos from this site or other NASA websites?
For questions about permission for using NASA images and videos, please refer to NASA's official Media Usage Guidelines. For any additional questions please contact bert.ulrich@nasa.gov
Is it possible to subset GPM data?
There are several sources for downloading and viewing data which allow you to subset the data to only include specific parameters and/or geographic locations. These include the GES DISC, Giovanni and STORM. In Giovanni you can obtain data for a specific country, U.S. state, or watershed by using the "Show Shapes" option in the "Select Region" pane.
What is the difference between "Near Real-time" (NRT) and "Production" / "Research" data?
GPM data products can be divided into two groups (near real-time and production) depending on how soon they are created after the satellite collects the observations. For applications such as weather, flood, and crop forecasting that need precipitation estimates as soon as possible, near real-time data products are most appropriate. GPM near real-time (GMI & DPR) products are generally available within a few hours of observation. For all other applications, production data products are generally the best data sets to use because additional or improved inputs are used to increase accuracy. These other inputs are only made available several days, or in some cases, several months, after the satellite observations are taken, and the production data sets are computed after all data have arrived, making possible a more careful analysis.
For the GPM IMERG dataset, IMERG Early and Late Runs are the near real-time products, while IMERG Final Run is the research / production product. Click here to learn more about the differences between IMERG Early, Late and Final.
The new V07B IMERG Late and Early Run products commenced processing around 1300 UTC on 6 June 2024, starting with data for 0000 UTC on 1 June 2024. It will take a number of hours for the days before 6 June to be processed, after which users should see the normal latencies of 4 and 12 hours for Early and Late, respectively. Note that the polar regions are initially largely set to "missing" in the Early Run because input data for times before 1 June that would normally be used for forward morphing are not provided as part of the startup.
Due to unforeseen issues with the recent GPM near real-time system updates, IMERG V07B Early and Late Run production has been delayed. Currently the PPS plans for IMERG V07B Early and Late Run data to begin production on June 6, 2024. GPM L1 and L2 data has already resumed production, and can be accessed on the the jsimpson and jsimpsonhttps servers.
Recent hardware and operating system changes in the PPS near real-time system have presented challenges that are preventing the production of the new V07B Early and Late Runs at present. One feed for a major input data source is in the process of being enabled, after which the Early and Late should be ready to begin production. The most likely scenario is that this start will happen tomorrow, June 5, at which point the record will be started from June 1.
As announced earlier in the month, the PPS are updating the GPM near-realtime (NRT) servers on Monday, June 3. The IMERG product will also be updated to V07B at this time. Details: The update will start at approximately 10:00 UTC 3 June 2024 No NRT products will be produced for about 4 hours during the system update. This also means no L1 GMI, radar, combined, partner products, or L2 products will be produced during this time. Following successful system updates, PPS will the start L1 and L2 data production. The PPS will install the IMERG V07B algorithms. The IMERG NRT V07B products, when...
The PPS has moved the date of the GPM Near-realtime (NRT) computing system updates to take place on Monday, June 3, 2024. At this time, IMERG will also be updated to V07. June 1 and 2 IMERG data will be included in the “initial processing”, so that the entire month will be available at V07 without having to wait for the Final to be processed at the usual 3.5-month latency. PPS has already made available on jsimpson.pps.eosdis.nasa.gov and jsimpsonhttps.pps.eosdis.nasa.gov IMERG V07B Early Run retro-processed data. The V07B data is in /NRTPUB/imerg/early/ subdirectories: 200006-200012 200101...