Nov 30 2009

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NASA’s GSFC selected Ball Aerospace and Technologies Corporation to build a second GMI for the GPM mission. Ball had designed the identical instruments—GMI 1 and GMI 2—as multichannel, conical-scanning, microwave radiometers, which would serve an essential role in the near-global coverage of GPM. Ball planned to conduct full instrument testing on GMI 1 in mid-2010, with launch aboard the spaceborne GPM core observatory scheduled for 2013. The GMI-2 launch would follow in 2014. Ball had designed the 8-foot-high (2.4-meter-high) GMI instruments to rotate at 32 revolutions per minute, to perform temporal sampling of rainfall accumulations and more frequent and higher quality data collection, using two stable calibration points.

Ball Aerospace and Technologies Corporation, “Ball Aerospace Selected for Second NASA GMI Microwave Imager,” news release, 30 November 2009, http://www.ballaerospace.com/page.jsp?page=30&id=363 (accessed 21 December 2011).

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