Sensing atmospheric water vapor with the global positioning system

Global Positioning System (GPS) receivers, water vapor radiometers (WVRs), and surface meteorological equipment were operated at both ends of a 50-km baseline in Colorado to measure the precipitable water vapor (PWV) and wet delay in the line-of-sight to GPS satellites. Using high precision orbits, WVR-measured and GPS-inferred PWV differences between the two sites usually agreed to better than 1 mm. Using less precise on-line broadcast orbits increased the discrepancy by 30%. Data simulations show that GPS measurements can provide mm-level separate PWV estimates for the two sites, as opposed to just their difference, if baselines exceed 500 km and the highest accuracy GPS orbits are used.

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An edited version of this paper was published by AGU. Copyright 1993 American Geophysical Union.
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Author Rocken, Christian
Ware, Randolph
Van Hove, Teresa
Solheim, Fredrick
Alber, Chris
Johnson, James
Bevis, Mike
Businger, Steven
Publisher UCAR/NCAR - Library
Publication Date 1993-12-14T00:00:00
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Topic Category geoscientificInformation
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Metadata Date 2023-08-18T18:44:05.850269
Metadata Record Identifier edu.ucar.opensky::articles:17354
Metadata Language eng; USA
Suggested Citation Rocken, Christian, Ware, Randolph, Van Hove, Teresa, Solheim, Fredrick, Alber, Chris, Johnson, James, Bevis, Mike, Businger, Steven. (1993). Sensing atmospheric water vapor with the global positioning system. UCAR/NCAR - Library. http://n2t.net/ark:/85065/d7v1263t. Accessed 29 June 2025.

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