Mission Status

March 2015

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 data from the mission is available for the public to download from a variety of sources and formats which are outlined on the PMM Data Access page.

Mission Updates

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...
On Saturday, March 8, just after 10 a.m. EST, the second of the two science instruments aboard the Global Precipitation Measurement (GPM) mission's Core Observatory was activated, and the teams in the mission operations center and launch support room at NASA's Goddard Space Flight Center in Greenbelt, Md., began the instrument's checkout period. DPR functional checkout activities and internal calibrations continued on Sunday and will continue this week and next. DPR...
The Global Precipitation Measurement mission Core Observatory is performing normally. The initial checkout of the GMI instrument and the spacecraft showed both are performing as expected, and the GMI instrument continues to collect science data on rain and snowfall.
The Global Precipitation Measurement mission Core Observatory is performing normally. The GPM Microwave Imager (GMI) continues in science mode, and GMI data is being sent to the Precipitation Processing System (PPS) at NASA's Goddard Space Flight Center in Greenbelt, Md. Using the initial data, the instrument team has verified that GMI is working well on-orbit.   The GPM Core Observatory will have a 60 day on-orbit check out period to ensure the healthy operation of the...
The Global Precipitation Measurement mission Core Observatory is performing normally. Today, the GPM Microwave Imager (GMI) instrument started to spin at its normal rate and collect science data on rain and snowfall. The GMI instrument is a multi-channel microwave radiometer that uses 13 channels to measure the intensity of the microwave energy emitted from Earth's surface and atmosphere. GMI will detect total precipitation within all layers of clouds, including snow and ice, and rain from...
Today, the Global Precipitation Measurement mission Core Observatory successfully fired its thrusters for five seconds to check out the thruster performance. This type of maneuver, called a delta-V, changes the velocity of the spacecraft to adjust the altitude of its orbit. Today's delta-V resulted in only a very slight change in the orbit, but will help the GPM team assess and calibrate the thruster performance. By contrast, yesterday the team pulsed each maneuvering thruster 3-6 times,...
Following yesterday’s activities with the two science instruments associated with the Global Precipitation Measurement core observatory, the flight control team’s attention today is focused on the observatory’s onboard maneuvering thrusters. The satellite has a dozen thrusters: four forward and eight aft. The flight team is activating and initializing the thrusters over the course of today. A brief (5 second) propulsion burn to further calibrate the thrusters is planned...
Friday evening, GPM flight controllers at NASA Goddard began using the satellite’s High Gain Antenna system for high-rate data rate transmissions through NASA’s orbiting fleet of Tracking Data Relay Satellites. Having high-rate data flowing through the TDRS system allows the spacecraft recorder to be downloaded more frequently. During science operations, TDRS communication will allow availability of science data within 3 hours of measurement. Just after 11 a.m. EST on Saturday,...
Following activation and warm up of the Global Precipitation Measurement Microwave Imager (GMI) electronic systems, the team at NASA’s Goddard Space Flight Center in Greenbelt, Md., deployed the main reflector of the U.S. science instrument for the GPM Core Observatory. A significant step was also achieved today in the activation of the science instrument provided by the Japan Aerospace Exploration Agency (JAXA) with the turning on of the controller for the Dual-Frequency Precipitation...
The GPM Core Observatory continues power positive, stable on the sun line and communicating with the GPM Mission Operations Center at NASA’s Goddard Space Flight Center in Greenbelt, Md. The spacecraft magnetic torquer bar polarity was adjusted to eliminate rotational momentum gain. Star trackers were turned on and the High Gain Antenna was successfully deployed. Within the next day or two, the spacecraft controllers at NASA Goddard will begin to use the antenna to communicate with...

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