准实时地基GPS可降水量的解算方案与可靠性研究

THE STUDY OF THE COMPUTE PROJECT AND RELIABILITY OF QUASI-REAL-TIME GROUND-BASED GPS PRECIPITABLE WATER VAPOR

关键词:  水汽辐射计  对流层延迟  可降水量  无线电探空

Key words:  water vapor radiometer  zenith tropospheric delay  precipitable water vapor  radiosonde

摘要:

对准实时地基GPS可降水量的解算方案与可靠性的探讨,围绕三个方面展开:准实时GPS对流层延迟解算的最佳方案的确定;GPS可降水量与无线电探空资料的比较;GPS可降水量与水汽辐射计数据的比较。为了实时应用于气象领域,准实时对流层延迟的最佳方案为快速预报星历松弛解。在快速预报星历松弛解GPS可降水量与无线电探空数据的比较中,两者的相关性为0.88,绝对值均值为5.4 mm。GPS可降水量与水汽辐射计资料比较得到两者差值的均方根为1.68 mm。最后得到了最佳的准实时地基GPS可降水量的解算方案和在气象领域可降水量的反演的可行性的结论。

Abstract:

The article is about the discussion of the compute project of a quasi-real-time ground-based GPSprecipitable water vapor and its reliability. It includes three parts, which are the confirmation of the bestproject about the quasi-real-time GPS tropospheric zenith delay, the comparison of GPS precipitable watervapor and radiosonde, and the comparison between GPS precipitable water vapor and water vapor radiometer.The best project is the ultra rapid ephemeris relax solution in order to timely apply to the meteorologicalstudy. From the comparison of GPS precipitable water vapor of ultra rapid ephemeris relax solution andradiosonde, we can get the results that the related coefficient is 0.88 and the absolute mean value is 5.4 mm.We get the root mean square of GPS precipitable water vapor and water vapor radiometer is 1.68 mm in thecomparison of GPS precipitable water vapor and water vapor radiometer. Finally we have gotten the solutionto the best compute project of quasi-real-time ground-based GPS precipitable water vapor and the reliabilityof precipitable water vapor remotely sensed in meteorology subjects.