Sentences with phrase «first microwave sounding unit»
Since the first microwave sounding unit was launched into orbit in November 1978, satellite - based instruments have measured the temperature of the atmosphere from the surface up to an altitude of about eight kilometers above sea level.
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In March 1990, NASA's Roy Spencer and University of Alabama - Huntsville's (UAH) John Christy dropped quite a bomb when they published the first record of lower atmospheric temperatures sensed by satellites» microwave sounding units (MSUs).