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GPS meteorology - Remote sensing of atmospheric water vapor using the Global Positioning SystemWe present a new approach to remote sensing of water vapor based on the Global Positioning System (GPS). Geodesists and geophysicists have devised methods for estimating the extent to which signals propagating from GPS satellites to ground-based GPS receivers are delayed by atmospheric water vapor. This delay is parameterized in terms of a time-varying zenith wet delay (ZWD) which is retrieved by stochastic filtering of the GPS data. Given surface temperature and pressure readings at the GPS receiver, the retrieved ZWD can be transformed with very little additional uncertainty into an estimate of the integrated water vapor (IWV) overlying that receiver. Networks of continuously operating GPS receivers are being constructed by geodesists, geophysicists, and government and military agencies, in order to implement a wide range of positioning capabilities. These emerging GPS networks offer the possibility of observing the horizontal distribution of IWV or, equivalently, precipitate water with unprecedented coverage and a temporal resolution of the order of 10 min. These measurements could be utilized in operational weather forecasting and in fundamental research into atmospheric storm systems, the hydrologic cycle, atmospheric chemistry, and global climate change.
Document ID
19930030059
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Bevis, Michael
(NASA Headquarters Washington, DC United States)
Businger, Steven
(North Carolina State Univ. Raleigh, United States)
Herring, Thomas A.
(MIT Cambridge, MA, United States)
Rocken, Christian
(Univ. Navstar Consortium Boulder, CO, United States)
Anthes, Richard A.
(Univ. Corp. for Atmospheric Research Boulder, CO, United States)
Ware, Randolph H.
(Univ. Navstar Consortium Boulder, CO, United States)
Date Acquired
August 15, 2013
Publication Date
October 20, 1992
Publication Information
Publication: Journal of Geophysical Research
Volume: 97
Issue: D14
ISSN: 0148-0227
Subject Category
Meteorology And Climatology
Accession Number
93A14056
Funding Number(s)
CONTRACT_GRANT: NAGW-2616
CONTRACT_GRANT: NOAA-NA-90AADAC481
CONTRACT_GRANT: NAS5-3017
CONTRACT_GRANT: NSF EAR-87-21013
Distribution Limits
Public
Copyright
Other

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