Data Access

A server upgrade at the Fleet Numerical Meteorology and Oceanography Center (FNMOC) interrupted real-time transmission of Defense Meteorological Satellite Program (DMSP) data on Sept. 11, 2024, for the F16, F17, and F18 satellites at 18:28, 19:03, and 19:36 UTC, respectively. They returned to real-time operation on Sept. 18 at 23:45 UTC, and are believed to be back-filling the missed data. Thus, the IMERG Final Run products should be unaffected, but the Early and Late Run products will lack SSMIS for this period, with some variation due to latency considerations.

Recently, an error in the metadata of the GeoTIFF files for the IMERG V07B Final Run climatologies has been discovered. This error affected only the geolocation, specifically the orientation, of the fields and not the precipitation data. These files have been replaced with ones containing the correct metadata. Users who have downloaded the old GeoTIFF files should replace them with the new files. These IMERG climatology files are available at https://gpm.nasa.gov/data/imerg/precipitation-climatology

The following is a clarification on the current status of Version 06 and Version 07 IMERG data. Production of V06 Early and Late datasets ceased on 3 June. After overcoming significant hardware, software, and data feed challenges, PPS instituted “Initial Processing” (that is, processing of new data) for Early and Late starting with 00:00 UTC on 1 June. “Retrospective Processing” (that is, processing of the record of previous data) is complete for Early from June 2000 through December 2023. Retrospective Processing is on-going for Late, with parallel runs starting with June 2000 and June 2014

At 01:45 UTC 12 June, JAXA resumed their processing of GPM radar products, which allowed PPS to catch up the downstream GPM DPR products that they compute, as well as computing the Combined product. Fortunately, through the processing outage the JAXA-NASA data line continued to operate, providing the ancillary data that GPROF and IMERG needed to continue uninterrupted near real-time processing.

The PPS is now receiving AMSR2 data and JMA forecasts from JAXA, which means that GPROF and IMERG Early and Late products will continue being produced. The GPM radar and combined products are still unavailable due to the JAXA system issues. The PPS has also worked with partners at CSU to develop a new method of processing GPROF that will allow continued production even if no JMA forecast files are received, in the event of a future outage.

Due to an unexpected JAXA system failure the PPS is not receiving GPM DPR Ku and Ka L1B data as well as AMSR2 data. As a result, the PPS cannot produce the GPM radar or combined datasets. The PPS is also not receiving JMA 6 hourly forecasts, and as a result after 12:00 UTC on June 11, 2024 the PPS will not be able to produce the GPROF or IMERG products. JAXA estimates that their systems will start running again by 03:00 UTC 12 June, at which point production of the above products at the PPS will resume. Please check back here for further updates, and contact us with any questions.

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.

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

On June 1, 2024, the Precipitation Processing System (PPS) will be performing updates and maintenance on the GPM near real-time (NRT) servers. As a result, GPM NRT data will not be produced during this time and it's expected that the GPM NRT servers will be inaccessible for several hours. In event of anomalies during the update process, the servers may be down for a few days. In addition, the following updates are planned for IMERG V07: On June 1, 2024, hour 00, IMERG V07 Early and Late will begin production at the PPS (Initial Processing [IP]). Any June 1 data generated before the V07 update