GPM and CloudSat ground validation researchers are currently meeting at the University of Helsinki to discuss strategies for analyzing airborne and ground-based datasets from the Light Precipitation Validation Experiment (LPVEx) field campaign. This data analysis will help improve satellite-based precipitation retrievals in high latitude light rain and snowfall events.
Monday, September 26, 2011
A beta-version of the GPM Combined Algorithm code was released this week for the purpose of internal testing by team members. The GPM Combined Algorithm is developed to integrate sensor information from the two instruments onboard the GPM Core Observatory: the Dual-frequency Precipitation Radar (DPR) and the GPM Microwave Imager (GMI). The sophisticated software program combines raw data from each of the instruments to provide more comprehensive estimates of precipitation rate, water content...
Wednesday, August 24, 2011
On the afternoon of Tuesday, August 23rd, 2011, a 5.8 magnitude earthquake shook the Building 29 clean room which houses the GPM spacecraft. The following day, the team carefully inspected the I&T area and spacecraft. There was no visible damage or debris, and post-earthquake inspections identified no problems.
The High Gain Antenna System (HGAS) onboard the GPM Core Observatory finished acoustics and post-environmental deployment testing at NASA Goddard Space Flight Center. The HGAS will then undergo Thermal Vacuum testing before it is completed and delivered in mid-September.
The GPM Microwave Imager (GMI) successfully completed Pre-Environmental Review (PER) on July 19-20, 2011, at Ball Aerospace in Colorado, which marks another key milestone for the GMI instrument. The GMI will undergo acoustic testing, vibration testing, and electromagnetic and thermal vacuum testing starting in August 2011. The GMI instrument is a multi-channel, conical-scanning, microwave radiometer, enabling the GPM Core Observatory to serve as a radiometric reference and also a transfer...
The High Gain Antenna System (HGAS) completed vibration test and moved to the acoustic chamber for the acoustic test at Goddard Space Flight Center. The HGAS helps to provide directional pointing for the Radio Frequency communications antenna, used with NASA’s Tracking and Data Relay Satellite System.
The GPM Core Observatory structure successfully completed proof testing in the centrifuge facility at Goddard Space Flight Center. The satellite was tested at several different angles to simulate the increased feeling of gravity’s pull on the satellite during launch. Goddard's centrifuge can accelerate 2.5 tons to speeds so high that the payload experiences forces 30 times greater than the pull of Earth's gravity.
Thursday, December 17, 2009
GPM has successfully completed the GPM Mission Critical Design Review (CDR) on December 17, 2009. During this phase of the mission the activities are focused on the implementation of science and engineering plans for the mission. The engineering activities are focused on: Core Observatory development (in-house development at Goddard Space Flight Center, Greenbelt Maryland) GPM Microwave Imager (GMI) instrument development for flight units 1&2 (at Ball Aerospace, Boulder...
Wednesday, December 2, 2009
GPM has successfully completed the GPM Mission Key Decision Point - C (KDP-C) Review on December 2, 2009, which formally confirms the Implementation phase of the GPM Mission. Key Decision Point C (KDP-C) is the agency-level approval for the project to begin implementation, and baselines the project’s official schedule and budget.