TOPEX microwave radiometer (TMR)

TOPEX microwave radiometer (TMR)

An instrument on the TOPEX/POSEIDON mission. The TMR measures sea surface microwave emissivity at three frequencies (18, 21, and 37 GHz) to estimate to total water vapour content in the atmosphere. This estimate is used to correct to the water vapor–induced errors in the altimeter measurement. The 21 GHz channel is the primary channel for water vapour measurement, with the 18 GHz and 37 GHz channels used to remove the effects of wind speed and cloud cover, respectively.

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Industry/Domain: Earth science
Category: Physical oceanography
Company: Texas A&M University
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