Ellen Gray

GPM Completes Vibration Tests

The GPM Core satellite successfully completed vibration testing in July 2013, at NASA's Goddard Space Flight Center, Greenbelt, Md. The tests ensure that the spacecraft can withstand the vibrations caused by the Japan Aerospace Exploration Agency (JAXA) H-IIA rocket during satellite’s launch early in 2014. Sitting on a specialized mobile platform, the GPM spacecraft was abruptly moved back and forth in each of its three spatial orientations.

GPM Continues Environmental Testing

News Image: 

The GPM Core spacecraft has completed hot and cold thermal balance testing in the thermal vacuum chamber at NASA's Goddard Space Flight Center. Next it will undergo hot and cold cycle thermal vacuum testing, where the temperatures are alternatively raised to 104°F (40 degrees C) and lowered to 7°F (-14 degrees C) over the course of the next few weeks. 

Thermal vacuum testing is part of GPM's environmental test program to ensure
that the satellite is ready for the harsh conditions of space and will
continue into mid-January. 

Tropical Rainfall Measuring Mission Turns 15

TRMM reign of rain screenshot

By Ellen Gray, NASA Goddard Space Flight Center

Original www.nasa.gov Article (published 11/27/12)

When it rains it pours, goes the saying, and for the last 15 years, the data on tropical rainfall have poured in. NASA's Tropical Rainfall Measuring Mission (TRMM) was launched on Nov. 27, 1997, and for the last decade and a half has enabled precipitation science that has had far reaching applications across the globe.


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