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The GPM Core Observatory successfully launched from Tanegashima Space Center, Japan, on February 27th, 2014 at 1:37pm EST. It is currently in orbit and undergoing initial instrument checkout and testing procedures.
Tuesday, August 12, 2014
Since December 1997, TRMM and the instruments it carries have provided valuable information to researchers, the applications community, and the public. On July 8, 2014, pressure readings from the fuel tank indicated that TRMM is at the end of its fuel. As a result, NASA has ceased station keeping maneuvers and TRMM has begun its drift downward from its operating altitude of 402 km. A small amount of fuel has been retained to conduct debris avoidance maneuvers to ensure the satellite remains...
Wednesday, July 30, 2014
The Global Precipitation Measurement (GPM) mission's Precipitation Processing System at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, has released the Level 2 GPM Microwave Imager (GMI) data to the public. The data set includes precipitation rates, which show how much rain and snowfall accumulate over a given time period.
Monday, June 30, 2014
The GPM Core Observatory satellite was successfully launched on February 27th, 2014. Data from the GPM Microwave Imager (GMI) and Dual-frequency Precipitation Radar (DPR) have the following release schedule. All data are freely available through the NASA's Precipitation Processing System at http://pps.gsfc.nasa.gov
Wednesday, June 18, 2014
The first set of data from the Global Precipitation Measurement mission is now available to the public. The data set consists of GPM Microwave Imager instrument observations, called brightness temperatures. Brightness temperatures are a measurement of naturally occurring energy radiated, in this case, by precipitation particles like raindrops or snowflakes. Other data sets, like the rain rate information, will be released later this summer. By themselves, however, the brightness...
Friday, May 2, 2014
The GPM spacecraft continues to perform normally. The GPM Microwave Imager and Dual-frequency Precipitation radar continue operations and calibration. The spacecraft performed two routine maneuvers. The first was a 180-degree yaw (left/right in the horizontal plane) turn. This is the second yaw turn that changes the orientation of the spacecraft; it is now flying forwards again. Yaw turns are performed approximately every 40 days for thermal control, as the angle between the spacecraft's...
Friday, April 11, 2014
The Global Precipitation Measurement mission's Core Observatory is performing normally. Calibration of the Dual-frequency Precipitation Radar (DPR) and GPM Microwave Imager (GMI) continued.
Friday, April 4, 2014
The Global Precipitation Measurement mission's Core Observatory is performing normally. On April 2, the GPM Core Observatory fired its thrusters for an 80-second delta-V burn that accelerated the spacecraft and circularized its orbit. The Core Observatory is now flying in its final orbit, 253 miles (407 kilometers) above Earth's surface. Calibration of the Dual-frequency Precipitation Radar (DPR) and GPM Microwave Imager (GMI) continued. On March 30 and 31, additional DPR external...
Friday, March 28, 2014
The Global Precipitation Measurement mission's Core Observatory commissioning activities continued normally this week. Both the GPM Microwave Imager and the Dual-frequency Precipitation Radar (DPR) are collecting science data and NASA and the Japan Aerospace Exploration Agency released the first images from the instruments on March 25. The DPR's functional checkout activities and internal calibration continued. The first external calibration using the Active Radar Calibration site...
Friday, March 21, 2014
The Global Precipitation Measurement mission's Core Observatory is performing normally. Both the GPM Microwave Imager and Dual-frequency Precipitation Radar are collecting science data. Functional checkout activities and internal calibration of the Dual-frequency Precipitation Radar continued. On March 17, the team executed GPM's first scheduled yaw turn to turn the orientation of the spacecraft 180 degrees. Yaw is the left/right orientation in the horizontal plane of the...
Thursday, March 13, 2014
On March 12, the GPM Core Observatory fired its thrusters for a 30-second check-out of their performance. The burn, called a delta-v, changes the velocity of the spacecraft to adjust the altitude of its orbit. This week's short maneuver did not greatly alter the satellite's orbit but was used instead for further calibration of the thrusters. Functional checkout activities and internal calibration of the Dual-frequency Precipitation Radar continued this week. Both DPR and the GPM...