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Atmospheric moisture measurements - A microwave radiometer-radiosonde comparisonMeasurements of the thermal emission of the sky at three frequencies (20.7, 22.2, and 31.4 GHz) with the NASA/Goddard Space Flight Center Crustal Dynamics Project MW Water Vapor Radiometer are reported. These measurements are compared with brightness temperatures inferred from measurements from VAISALA radiosonde packages launched every 3 hr during the experiment period. An error analysis for the radiosonde-inferred brightness temperatures is performed under the assumption of reasonable random uncertainties for the pressure, temperature, and humidity measurements and propagation of these uncertainties through the analysis algorithm. For the assumed uncertainties, the dominant contribution to the total uncertainty comes from the temperature measurement (66-88 percent), whereas the relative humidity measurement contributes only 2-8 percent, except in the vicinity of the water vapor line, where the contribution is 10-20 percent.
Document ID
19930060292
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
England, Martin N.
(Computer Sciences Corp.; NASA, Goddard Space Flight Center Greenbelt, MD, United States)
Schmidlin, F. J.
(NASA Wallops Flight Facility Wallops Island, VA, United States)
Johansson, Jan M.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Date Acquired
August 16, 2013
Publication Date
March 1, 1993
Publication Information
Publication: IEEE Transactions on Geoscience and Remote Sensing
Volume: 31
Issue: 2
ISSN: 0196-2892
Subject Category
Meteorology And Climatology
Accession Number
93A44289
Distribution Limits
Public
Copyright
Other

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