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Record Details

Record 38 of 10083
TOPEX/Poseidon Microwave Radiometer (TMR): 1. Instrument Description and Antenna Temperature Calibration
External Online Source: hdl:2014/35882
Author and Affiliation:
Ruf, C. S.
Keihm, S. J.
Janssen, M. A.
Abstract: The 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...
Publication Date: Aug 30, 1993
Document ID:
20060039376
(Acquired Sep 14, 2006)
Subject Category: EARTH RESOURCES AND REMOTE SENSING
Document Type: Journal Article
Publication Information: IEEE Transactions on Geoscience and Remote Sensing
Financial Sponsor: Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA, United States
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ALTIMETERS; BRIGHTNESS TEMPERATURE; CALIBRATING; CORRECTION; DIGITAL DATA; FREQUENCIES; LAUNCHING; LOW EARTH ORBITS; MICROWAVE RADIOMETERS; MONITORS; POSEIDON SATELLITE; PRECISION; RADIO ALTIMETERS; RADIOMETERS; SATELLITE ORBITS; SIDELOBES; THERMAL ENVIRONMENTS; TOPEX; VIEWING; WATER; WATER VAPOR
Availability Source: Other Sources
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