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Core Observatory Commissioning Continues

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 in Tsukuba, Japan, was performed on March 23. A 120-second "Delta-V" burn was successfully completed Wednesday

GPM Power Positive, Stable, and Communicating

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 this time, the momentum wheels are being used more than expected. This situation does not pose any threat to the health of

GPM Completes Final Checks, Prepares for Fueling

The GPM Core Observatory completed final checks and the team is preparing to install it in the transportation canister that will move it to the spacecraft and fairing assembly building at JAXA’s Tanegashima Space Center, Japan. There, the spacecraft will be fueled next week, followed by installation into the fairing that will contain the spacecraft on the top of the H-IIA rocket. Last week, GPM passed its Operational Readiness Reviewat NASA's Goddard Space Flight Center in Greenbelt, Md. A NASA panel reviewed all systems and procedures in place for GPM's ground, operation and control systems

GPM Completes Propulsion System Checks, End-to-End Test, Mission Rehearsal

The Global Precipitation Measurement (GPM) Core Observatory had a busy week at Tanegashima Space Center, Japan. The GPM propulsion team did a thorough check of the propulsion system to prepare for fueling the spacecraft later this month. In addition, the GPM completed a full End-to-End test. End-to-End testing simulates mission conditions with the ground systems and communication systems between the spacecraft, data return functions, the Mission Operations Center and Precipitation Processing System at NASA’s Goddard Space Flight Center in Greenbelt, Md., and the Japan Aerospace Exploration

New Video Shows GPM's Journey to Japan

New Video Shows GPM's Journey to Japan
Thursday, January 16, 2014
Pack it up, put it on a plane and fly it to Japan. It sounds simple enough, but a new video from NASA shows when your package is a satellite, it's anything but. NASA's new video, "GPM's Journey to Japan," highlights the unique shipment of the Global Precipitation Measurement mission's Core Observatory by air, land and sea. Built at NASA's Goddard Space Flight Center in Greenbelt, Md., the GPM spacecraft travelled roughly 7,300 miles (11,750 kilometers) to its launch site at Tanegashima Space Center on Tanegashima Island, Japan, where it is scheduled for liftoff on Feb. 27, 2014, at 1:07 p.m...
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GPM Completes Spacecraft Alignments

GPM Completes Spacecraft Alignments
Wednesday, January 8, 2014
After a holiday break, final tests for the GPM Core Observatory resumed on Dec. 30, 2013, with alignment measurements. The spacecraft's instruments and components, such as star trackers and thrusters, are attached to the main body in specific configurations. Spacecraft alignment measurement is analogous to alignment for the wheels of a car. The Core Observatory measurements ensure that no parts have shifted during its transportation from the United States to Japan, so they will work as expected. The GPM Core Observatory in the clean room at Tanegashima Space Center, Japan Image Credit: NASA /...
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Engineering the GPM Core Observatory

Engineering the GPM Core Observatory
Thursday, January 2, 2014
For the past three years, the Global Precipitation Measurement (GPM) Core Observatory has gone from components and assembly drawings to a fully functioning satellite at NASA's Goddard Space Flight Center in Greenbelt, Md. The satellite has now arrived in Japan, where it will lift off in early 2014. The journey to the launch pad has been a long and painstaking process. It began with the most basic assembly of the satellite's frame and electrical system, continued through the integration of its two science instruments, and has now culminated in the completion of a dizzying array of environmental...
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Faces of GPM: Engineers

Submitted by JacobAdmin on Fri, 12/27/2013
Video Embed

An interview with Beth Weinstein, a GPM integration and test (I & T) engineer, Lisa Bartusek, GPM Deputy Mission Systems Engineer, and Carlton Peters, associate branch head at NASA Goddard Space Flight Center and the GPM thermal branch development lead.

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