期刊
GEOPHYSICAL RESEARCH LETTERS
卷 41, 期 10, 页码 3615-3621出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2013GL058721
关键词
GPS meteorology; real-time GPS; integrated water vapor; PPP ambiguity fixing; IGS real-time pilot project
The recent development of the International Global Navigation Satellite Systems Service Real-Time Pilot Project and the enormous progress in precise point positioning (PPP) techniques provide a promising opportunity for real-time determination of Integrated Water Vapor (IWV) using GPS ground networks for various geodetic and meteorological applications. In this study, we develop a new real-time GPS water vapor processing system based on the PPP ambiguity fixing technique with real-time satellite orbit, clock, and phase delay corrections. We demonstrate the performance of the new real-time water vapor estimates using the currently operationally used near-real-time GPS atmospheric data and collocated microwave radiometer measurements as an independent reference. The results show that an accuracy of 1.0 similar to 2.0mm is achievable for the new real-time GPS based IWV value. Data of such accuracy might be highly valuable for time-critical geodetic (positioning) and meteorological applications.
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