Real-time GPS sensing of atmospheric water vapor: Precise point positioning with orbit, clock, and phase delay corrections
Real-time GPS sensing of atmospheric water vapor: Precise point positioning with orbit, clock, and phase delay corrections
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DOI：
10.1002/2013gl058721
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发表时间：
2014-05-28
影响因子：
5.2
通讯作者：
Bender, Michael
中科院分区：
文献类型：
--
作者：
Li, Xingxing;Dick, Galina;Bender, Michael
国际全球导航卫星系统服务实时试点项目的最新发展和精确单点定位技术的巨大进步为利用全球定位系统地面网络实时确定综合水汽量以用于各种大地测量和气象应用提供了一个很有希望的机会。在这项研究中，我们开发了一个新的实时GPS水汽处理系统的基础上PPP模糊度固定技术与实时卫星轨道，时钟和相位延迟校正。我们展示了新的实时水汽估计的性能，使用目前业务上使用的近实时GPS大气数据和同位微波辐射计测量作为一个独立的参考。结果表明，新的基于实时GPS的IWV值可以达到1.0到2.0mm的精度。这种精确度的数据对于时间要求严格的大地测量（定位）和气象应用可能非常宝贵。
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.