李国平, 陈娇娜, 黄丁发, 郭洁. 地基GPS水汽实时监测系统及其气象业务应用[J]. 武汉大学学报 ( 信息科学版), 2009, 34(11): 1328-1331.
引用本文: 李国平, 陈娇娜, 黄丁发, 郭洁. 地基GPS水汽实时监测系统及其气象业务应用[J]. 武汉大学学报 ( 信息科学版), 2009, 34(11): 1328-1331.
LI Guoping, CHEN Jiaona, HUANG, Dingfa. Real-time Monitoring System of Precipitable Water Vapor Derived from Ground-based GPS and Its Applications in Meteorology[J]. Geomatics and Information Science of Wuhan University, 2009, 34(11): 1328-1331.
Citation: LI Guoping, CHEN Jiaona, HUANG, Dingfa. Real-time Monitoring System of Precipitable Water Vapor Derived from Ground-based GPS and Its Applications in Meteorology[J]. Geomatics and Information Science of Wuhan University, 2009, 34(11): 1328-1331.

地基GPS水汽实时监测系统及其气象业务应用

Real-time Monitoring System of Precipitable Water Vapor Derived from Ground-based GPS and Its Applications in Meteorology

  • 摘要: 给出了接收机五参数定位模型和精度评定的相关公式以及接收机C/A码伪距观测量精度评定方法和经验公式。设计了两组试验,分别是GPS信号能量为42dBHz和32dBHz时的950个及600个启动测试算例。数据分析结果表明,即使在高能量42dBHz的情况下,五参数的成功率达到了90%,一倍中误差的定位精度基本上在30~50m左右;在32dBHz时的成功率仅有60%,一倍中误差定位精度为60~80m左右。为了有效地提高5参数的解算成功率,需要提高卫星星历精度(包括卫星轨道精度和钟差精度)和大气延迟模型的改正精度。另外,还需要提高接收机基带C/A码的测量精度,包括中频量化精度和C/A码环跟踪精度。

     

    Abstract: The structure of real time system of monitoring water vapor derived from ground-based water is introduced. Its applications in meteorology are analyzed based on the precipitable water vapor derived from ground-based GPS. The time series of real time GPS-PWV is retrieved from observation data of being high spatial-temporal resolution,continuous,whole day and real time supplied by GPS networks. The application system of water vapor monitoring by ground-based GPS is constructed based on that. It supplies instruction for monitoring atrocious weather and short-time weather forecast,establishes the foundation for studying spatial-temporal distribution of atmospheric water vapor and exploiting atmospheric water resource through many disciplines.

     

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