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Hurricane Otis Strikes Acapulco, Mexico, as a Powerful Category 5 Storm

GPM Overpass of Hurricane Otis
Wednesday, October 25, 2023
After rapidly intensifying overnight, Hurricane Otis made landfall near Acapulco, Mexico around 1:25 a.m. CDT (06:25 UTC) on Wednesday Oct. 25 as a powerful Category 5 hurricane. Otis had maximum sustained winds estimated at 165 mph by the National Hurricane Center (NHC), making it the first Category 5 as well as the most powerful storm to hit the Pacific coast of Mexico on record. Otis formed into a tropical depression (TD 18-E) on the morning of Sunday Oct. 22 about 530 miles (850 km) south-southeast of Acapulco from a broad area of low pressure. The depression was moving slowly northward
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2023 PMM Science Team Meeting

Dates
Location
Minneapolis, MN

The meeting is by invitation* to Precipitation Measurement Mission (PMM) Science Team members and specified affiliates. Monday, September 18, 2023, is devoted to working group meetings. Tuesday through Thursday, September 19-21, 2023, will consist of general oral and poster sessions covering mission/program status, partner reports, science activities, field campaign results, and other science team business.  Friday, September 22, 2023, is devoted to algorithm team meetings (all Science Team Meeting attendees are invited).

Mission Affiliation
PMM

IMERG V07 Final Run Retrospective Processing Completed

As of Aug. 30, 2023, the entire available record of archived TRMM, GPM Core Observatory, partner satellite, and ancillary data has been retrospectively processed for the IMERG V07 Final Run dataset, covering June 2000 - April 2023. Initial processing (i.e., with newly arrived data) will extend the Final Run record as additional months of data are received, typically 3.5 months after the near real-time products, which users can determine by checking the IMERG Final Run data listings on the PPS or GES DISC GPM data sources (a full listing of GPM data downloads and sources can be found in the GPM

GPM L3 GPROF Daily and Monthly and L3 CLIM GPROF products will be updated to V07C on September 07, 2023

Commencing with the data date of Friday September 1, 2023 all GPM L3 GPROF Daily and Monthly products will be updated to the designation V07C. PPS will be making these V07C products available to the public starting on Thursday September 7, 2023. The L3 CLIM GPROF data products will also be updated on Thursday September 7, 2023. These products will commence with the data start date of Thursday June 1, 2023 and also have the designation V07C. This version update is necessary to correct the L3 gridded vertical hydrometeor profile means over the high latitude regions. This update identifies pixels

IMPORTANT: Errors in GPROF Orbits within Select IMERG Final Data Products

The IMERG development team has become aware that a small number of isolated bad Level 2 GPROF orbit granules leaked into V07A IMERG Final Run processing. The team is working with PPS to identify a more-complete list of such instances and trace them back to the Level 1C microwave data. Additional testing is being done and might reveal a few more cases. We are providing this information now in case the times happen to impinge on a detailed study that you are performing. The above image is an example of one of the worse cases (from F16 SSMIS); most cases are less severe or shorter in duration and

GPM Views Typhoon Bolaven

GPM Overpass of Cyclone Bolaven
Thursday, October 12, 2023
Typhoon Bolaven began as a tropical depression over the West Pacific Ocean on Oct. 7, 2023. On Oct. 10, Bolaven became a Typhoon and passed over the Mariana Islands as it tracked to the northwest. Bolaven then rapidly intensified over 12 hours from a Category 1 to a Category 5 storm on the Saffir-Simpson scale, starting around 12 UTC on Oct. 10. Several factors contributed to the rapid intensification, including modest shear in the atmosphere and warm sea-surface temperatures. This animation shows precipitation within Typhoon Bolaven around the time that rapid intensification began. The global
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2023 PMM Science Team Meeting Files

Group photo of 2023 PMM Science Team Meeting Attendees
Friday, October 6, 2023
Above image: Attendees of the 2023 PMM Science Team Meeting.
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Notification of Upcoming GPM Orbit Boost

The GPM Core Observatory satellite is scheduled to undergo a series of orbit boost maneuvers which will raise its altitude from 400km to 435km. These boosts are tentatively scheduled for Nov. 7 and 8, 2023. As a result of these maneuvers, the observing parameters of data collected by the GPM Microwave Imager ( GMI ) and Dual-frequency Precipitation Radar ( DPR ) instruments will change, including the footprint sizes and Earth incidence angle. The algorithms which process these data must be updated to accommodate these changes, including the Level 2 GPROF, DPR, and CORRA algorithms; the Level 3

GPM Orbit Boost

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Wednesday, September 27, 2023
Updated: Nov. 8, 2023 George Huffman, GPM Project Scientist The GPM Core Observatory (GPM-CO) satellite performed two orbit boost maneuvers on Nov. 7 and 8 , 2023 that raised its altitude from 400km to 435km. The goal of these boosts is to restore the GPM-CO's lifespan closer to the original estimates of ending in the early 2030’s. Recent lifespan estimates have been getting shorter due to unexpectedly high solar activity, which causes additional atmospheric drag on the spacecraft. The primary goal of restoring GPM-CO’s lifespan is to allow the GPM mission to overlap with the satellites
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