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SOFIA Water Vapor Monitor DesignThe SOFIA Water Vapor Monitor (WVM) is a heterodyne radiometer designed to determine the integrated amount of water vapor along the telescope line of sight and directly to the zenith. The basic technique that was chosen for the WVM uses radiometric measurements of the center and wings of the 183.3 GHz rotational line of water to measure the water vapor. The WVM reports its measured water vapor levels to the aircraft Mission Controls and Communication System (MCCS) while the SOFIA observatory is in normal operation at flight altitude. The water vapor measurements are also available to other scientific instruments aboard the observatory. The electrical, mechanical and software design of the WVM are discussed.
Document ID
20020091609
Acquisition Source
Ames Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Cooper, R. (TechnoScience Corp. Palo Alto, CA United States)
Roellig, T. L. (NASA Ames Research Center Moffett Field, CA United States)
Yuen, L. (TechnoScience Corp. Palo Alto, CA United States)
Shiroyama, B. (TechnoScience Corp. Palo Alto, CA United States)
Meyer, A. (Universities Space Research Association Moffett Field, CA United States)
Devincenzi, D.
Date Acquired
September 7, 2013
Publication Date
January 1, 2002
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Astronomical Telescopes and Instrumentation
Location: Waikoloa, HI
Country: United States
Start Date: August 1, 2002
Funding Number(s)
CONTRACT_GRANT: NAS2-97068
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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