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TOPEX/Poseidon Microwave Radiometer (TMR): 1. Instrument Description and Antenna Temperature CalibrationThe TOPEX/Poseidon Microwave Radiometer (TMR) is a 3-frequency radiometer flown on the TOPEX/Poseidon (T/P) satellite in low Earth orbit. It operates at 18, 21 and 37 GHz in a nadir only viewing direction which is co-aligned with the T/P radar altimeters. TMR monitors and corrects for the electrical path delay of the altimeter radar signal due to water vapor and non-precipitating liquid water in the atmosphere. This paper describes the TMR instrument and the radiometric instrument calibration required to derive antenna temperature (T_A) from the raw digital data. T_A precision of 0.4 K is predicted on orbit in all expected thermal environments. T_A accuracy of 0.5-0.6 K is expected following a post-launch field calibration campaign. When uncertainties related to antenna sidelobe corrections are included, this T_A accuracy yields a brightness temperature accuracy of 0.7- 0.8 K...
Document ID
20060039376
Acquisition Source
Jet Propulsion Laboratory
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Ruf, C. S.
Keihm, S. J.
Janssen, M. A.
Date Acquired
August 23, 2013
Publication Date
August 30, 1993
Publication Information
Publication: IEEE Transactions on Geoscience and Remote Sensing
Subject Category
Earth Resources And Remote Sensing
Distribution Limits
Public
Copyright
Other

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