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Record Details

Record 25 of 8195
MM-Wave Radiometric Measurements of Low Amounts of Precipitable Water Vapor
Author and Affiliation:
Racette, P.
Westwater, Ed
Han, Yong
Manning, Will
Jones, David
Gasiewski, Al
Abstract: An experiment was conducted during March, 1999 to study ways in which to improve techniques for measuring low amounts of total-column precipitable water vapor (PWV). The experiment was conducted at the DOE's ARM program's North Slope of Alaska/Adjacent Arctic Ocean Cloud and Radiation Testbed site (DoE ARM NSA/AAO CaRT) located just outside Barrow, Alaska. NASA and NOAA deployed a suite of radiometers covering 25 channels in the frequency range of 20 GHz up to 340 GHz including 8 channels around the 183 GHz water vapor absorption line. In addition to the usual CaRT site instrumentation the NOAA Depolarization and Backscatter Unattended Lidar (DABUL), the SUNY Rotating Shadowband Spectroradiometer (RSS) and other surface based meteorological instrumentation were deployed during the intensive observation period. Vaisala RS80 radiosondes were launched daily as well as nearby National Weather Service VIZ sondes. Atmospheric conditions ranged from clear calm skies to blowing snow and heavy multi-layer cloud coverage. Measurements made by the radiosondes indicate the PWV varied from approx. 1 to approx. 5 mm during the experiment. The near-surface temperature varied between about -40 C to - 15 C. In this presentation, an overview of the experiment with examples of data collected will be presented. Application of the data for assessing the potential and limitations of millimeter-wave radiometry for retrieving very low amounts of PWV will be discussed.
Publication Date: Jan 01, 2000
Document ID:
20000039785
(Acquired May 19, 2000)
Subject Category: EARTH RESOURCES AND REMOTE SENSING
Document Type: Preprint
Meeting Information: International Geoscience and Remote Sensing Symposium (IGARSS '00); 24-28 Jul. 2000; United States
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: EXPERIMENTATION; METEOROLOGICAL INSTRUMENTS; METEOROLOGICAL SERVICES; MILLIMETER WAVES; RADIOMETERS; WATER VAPOR; ALASKA; ARCTIC OCEAN; BACKSCATTERING; BLOWING; CARTS; DEPLOYMENT; DEPOLARIZATION; OPTICAL RADAR; RADIOSONDES
Availability Source: Other Sources
Availability Notes: Abstract Only
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