Wednesday, February 8, 2012
Japanese scientists and engineers have completed construction on a new instrument designed to take 3-D measurements of the shapes, sizes and other physical characteristics of both raindrops and snowflakes. The instrument will be shipped from Japan to NASA's Goddard Space Flight Center, Greenbelt, Md., to be integrated into an upcoming NASA Earth science satellite.
Tuesday, January 17, 2012
The GPM Cold-season Precipitation Experiment (GCPEx) to measure falling snow is currently underway in Ontario, Canada. The field campaign, which runs from January 17 to February 29, 2012, is designed to improve satellite estimates of falling snow and test ground validation capabilities for GPM.
Wednesday, December 14, 2011
GPM's two solar array wings that extend to the right (+Y) and left (-Y) of the spacecraft are currently undergoing assembly and testing at Goddard Space Flight Center, Greenbelt, Md. The solar arrays provide all the electrical energy for the satellite, and must survive flying in Earth's thin upper atmosphere at an altitude of 407 km (253 miles), where they will be subjected to small drag forces and exposure to corrosive atomic oxygen.
Tuesday, November 29, 2011
A three day meeting, co-sponsored by NESDIS/STAR and NWS/OHD, is being held at the Earth System Science Interdisciplinary Center (ESSIC) at the University of Maryland from November 29th through December 1st. This meeting follows up on the highly successful first workshop from August 2010 and focuses on user applications of GPM-era data and products. The meeting attendees, including government researchers, academics, and representatives from commercial industry, will...
Over 150 scientists from 10 different countries are meeting in Denver, Colorado, to discuss rain and snow and how to measure them from space. Only once a year members of the Precipitation Measurement Missions (PMM) Science Team come together to discuss the science surrounding both the current Tropical Rainfall Measuring Mission (TRMM) and the upcoming Global Precipitation Measurement (GPM) mission that will launch in 2014.
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...