Obtaining single path phase delays from GPS double differences

We describe a method for obtaining single-path phase delays from GPS double differences. The resulting "zero differences" (ZDs) can be used for remote sensing of atmospheric water vapor. The method is demonstrated by simulating and observing atmospheric delay gradients, and by comparing ZDs with pointed radiometer observations of integrated water vapor along GPS ray paths. In-situ GPS antenna phase center and multipath effects are mapped in ZD residuals for a specific site and network. We conclude that ZDs derived from GPS network data show promise for real time sensing of water vapor for use in meteorological modeling and forecasting.

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An edited version of this paper was published by AGU. Copyright 2000 American Geophysical Union.
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Author Alber, Chris
Ware, Randolph
Rocken, Christian
Braun, John
Publisher UCAR/NCAR - Library
Publication Date 2000-09-01T00:00:00
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Topic Category geoscientificInformation
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Metadata Date 2023-08-18T18:44:04.389273
Metadata Record Identifier edu.ucar.opensky::articles:17351
Metadata Language eng; USA
Suggested Citation Alber, Chris, Ware, Randolph, Rocken, Christian, Braun, John. (2000). Obtaining single path phase delays from GPS double differences. UCAR/NCAR - Library. http://n2t.net/ark:/85065/d77945zj. Accessed 23 July 2025.

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