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2014 PMM Science Team Meeting Summary from the Earth Observer, November 2014

Document Description

This excerpt from the November 2014 edition of The Earth Observer provides a summary of the activities at the PMM Science Team Meeting which took place from August 4 - 7, 2014. The PMM program supports scientific research, algorithm development, and ground-based validation activities for the Tropical Rainfall Measuring Mission (TRMM) and the Global Precipitation Measurement (GPM) Core Observatory that launched on February 27, 2014.

GPM Dissects Super Typhoon Hagupit

GPM Dissects Super Typhoon Hagupit
Friday, December 12, 2014
On December 5, 2014 (1032UTC) the Global Precipitation Measurement (GPM) mission's Core Observatory flew over Typhoon Hagupit as it headed towards the Philippines. A few hours later at 1500 UTC (10 a.m. EST), Super Typhoon Hagupit's maximum sustained winds were near 130 knots (149.6 mph/241 kph), down from 150 knots (172 mph/277.8 kph). Typhoon-force winds extend out 40 nautical miles (46 miles/74 km) from the center, while tropical-storm-force winds extend out to 120 miles (138 miles/222 km). Animation revealing a swath of GPM/GMI precipitation rates over Typhoon Hagupit. As the camera moves...
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GMI Production Halted for Deep Space Calibration

On December 8, 2014 and December 10, 2014 the GPM MOC will conduct deep space calibrations maneuvers that will assist in physically verifying GMI calibration changes and also help in further characterization of the GMI instrument itself. Special processing is required for the data collected during the DSC. Therefore, PPS production of Standard GMI products will be halted on Dec 8 at 20:30 UTC. Processing will resume during normal business hours on Dec 9. On December 10, the maneuver is scheduled to begin at 12:00 UTC. Depending on the arrival of the DSC data processing may again be halted

GPM Core Observatory Sees Hagupit's Eye

GPM Core Observatory Sees Hagupit's Eye
The GPM satellite flew almost directly above dangerous typhoon Hagupit on December 5, 2014 at 1032 UTC as the typhoon was approaching the Philippines. The GPM Microwave Imager (GMI) instrument measured rain falling at a rate of over 76 mm (almost 3 inches) per hour in the typhoon's eye wall. This 3-D view of Hagupit's precipitation structure was made using data from the Ku band on GPM's dual frequency radar instrument (DPR). DPR showed that some tall thunderstorm in Hagiput's eye wall were reaching heights of almost 15 km (about 9.3 miles). Click here to see a Low Resolution 640x360 simulated

Updated GPM Radiometer Products

The Precipitation Processing System (PPS) has begun producing updated GPM radiometer products as of 12/4/2014 due to an error discovered in the calculation of the Sun Angle in the PPS Geolocation Toolkit. This is considered a minor update with the Product Version being incremented in letter only. Please see the list of affected products here: http://pps.gsfc.nasa.gov/Documents/GPM_PPS_SunAngle_Products_20141204.p… For most radiometers the sun angle is used as ancillary information, but for the TRMM microwave imager (TMI) the correction also slightly impacts brightness temperature and

TRMM Precipitation Radar Data Suspended

The TRMM satellite is descending, and the users of TRMM Precipitation Radar (PR) data should be aware that the last production orbit of public PR data was orbit #96230 from October 7th, 2014. From that point forward, the TRMM PR data is suspended because no useful cloud data are being observed. It is possible that PR data will again be made available when TRMM descends to the vicinity of its at-launch altitude of 350 km. TRMM Microwave Imager (TMI) data will continue to be produced and publicly available during the descent of the spacecraft until it reaches its decommissioning altitude of

GPM Flies Over Hurricane Gonzalo

GPM Flies Over Hurricane Gonzalo
Friday, October 17, 2014
Download in Hi-Res from the Scientific Visualization Studio On October 16th, 2014 (1342 UTC) the Global Precipitation Measurement (GPM) mission's Core Observatory flew over Hurricane Gonzalo as it headed towards Bermuda. Hurricane Gonzalo remains a category 4 hurricane on the Saffir-Simpson Hurricane Scale, with maximum sustained winds at 130 mph. As of 12:00 UTC (8:00a.m. EDT) on Friday, October 17th, the National Hurricane Center forecast located the storm about 195 miles south southwest of Bermuda, where a hurricane warning is in effect. The GPM Core Observatory carries two instruments that...
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GPM Scans Typhoon Phanfone

GPM Scans Typhoon Phanfone
Wednesday, October 15, 2014
Animation revealing a swath of GPM/GMI precipitation rates over Typhoon Phanfone. The camera then moves down closer to the storm to reveal DPR's volumetric view of Phanphone. A slicing plane dissects the Typhoon from south to north and back again, revealing it's inner precipitation rates. Shades of blue indicate frozen precipitation (in the upper atmosphere). Shades of green to red are liquid precipitation which extend down to the ground. Download in Hi-Res from the Scientific Visualization Studio On October 6, 2014 (0215 UTC) the Global Precipitation Measurement (GPM) mission's Core...
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GPM Data Goes Public

The most accurate and comprehensive collection of rain, snowfall and other types of precipitation data ever assembled now is available to the public. This new resource for climate studies, weather forecasting, and other applications is based on observations by the Global Precipitation Measurement (GPM) Core Observatory, a joint mission of NASA and the Japan Aerospace Exploration Agency (JAXA), with contributions from a constellation of international partner satellites. The GPM Core Observatory, launched from Japan on Feb. 27, carries two advanced instruments to measure rainfall, snowfall, ice
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