- Mission Overview
- Extreme Weather
- PMM Science Team
- Science Team Login
- Science Overview
- Research Topics
- Storm Structure and Mesoscale Dynamics
- Precipitation Microphysics
- Global Water Cycle
- Climate Change
- Precipitation Algorithms
- Radar Algorithms
- Radiometer Algorithms
- Combined Algorithms
- Multi-Satellite Algorithms
- Ground Validation
- Direct Statistical Validation
- Physical Validation
- Integrated Hydrological Validation
- Field Campaigns
- Data Access
The GPM Core Observatory has been successfully transported from NASA Goddard Space Flight Center to the launch site at Tanegashima Space Center, Japan, and is in the final stages of testing with a projected launch date of February 27th 2014.
Thursday, March 6, 2014
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.
Wednesday, March 5, 2014
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...
Tuesday, March 4, 2014
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...
Monday, March 3, 2014
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,...
Sunday, March 2, 2014
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...
Saturday, March 1, 2014
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...
Saturday, March 1, 2014
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,...
Friday, February 28, 2014
The GPS system has been switched on. This tells the satellite the time and its location with respect to the Earth's surface. The team is readying the spacecraft to use its High Gain Antenna for high data-rate communication through the Tracking and Data Relay Satellite System.
Friday, February 28, 2014
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...
Thursday, February 27, 2014
The GPM spacecraft is power positive, stable on the sun line and communicating with the GPM Mission Operations Center (MOC) at NASA Goddard Space Flight Center in Greenbelt, Md. The GPM flight control teams at NASA Goddard are studying a situation with the spacecraft where the satellite is gaining a small amount of rotational momentum. In a normal state, there are environmental forces on the spacecraft that are corrected by the momentum wheels and magnetic torquer bars. At...