Department of Climate and Space Sciences and Engineering in the College of Engineering at the University of Michigan

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SPRL Built HRDI Instrument on NASA's Falling UARS Satellite

Posted: September 23, 2011

SPRL Built HRDI Instrument on NASA's Falling UARS Satellite

The Upper Atmosphere Research Satellite (UARS) is expected to reenter the Earth's atmosphere later today, Friday September 23, 2011.  One of the instruments on UARS was the High Resolution Doppler Imager which was built at the Space Physics Research Laboratory of the department of AOSS in the late 1980's.  At a project cost of approximately $35M (in 1990 dollars) it was the largest and most expensive instrument ever built by the lab.  It operated successfully from late 1991 until early 2005.  At the time it was turned off, HRDI was still operating normally and taking high quality scientific data.  UARS was responsible for literally hundreds of scientific papers extending our knowledge of the stratosphere, mesosphere, and lower thermosphere,  solar irradiance, and iter-action of the lower and upper atmosphere. --Wilbert Skinner, Former AOSS Research Scientist

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