【摘要】 利用济南区域GPS基准站网,建立了济南实时GPS水汽反演系统。GPS观测数据存放存储目录格式与参考站相一致,有利于观测数据的实时获得;采用IGS超快速星历,保证解算的实时性。并对2008年6、7两个月的GPS反演结果和探空解算结果、实际降水量进行了对比分析。结果表明:GPS探测和探空探测所得的可降水量在时间变化上具有良好的相关性,相关系数可达0.88;济南实时GPS水汽反演系统是可用的;降水出现前GPS可降水量有一个持续上升阶段,明显的降水时段对应GPS可降水量高值区,强降水前GPS可降水量达到峰值,GPS可降水量的急剧下降预示降水明显减弱或结束。更多还原

【Abstract】 Jinan real-time GPS water vapor retrieval system is found by Jinan local GPS Network.Storing directory and format of GPS observation data is consistent with that of the reference station,which is in favor of getting the real-time observational data.IGS ultrarapid ephemeris has been used to ensure the real-time of the solution.The results of GPS-PWV,sonde-PWV and the precipitation in June and July,2008 are also compared.The result shows that there is a strong correlation between the precipitable water of GPS observation and of sonde observation(the correlation coefficient is 0.88),so the Jinan real-time GPS water vapor retrieval system is useful.Before rain starts GPS-PWV is rising,and the high-value of PWV can be considered to infer time interval of considerable rainfall.Before heavy rainfall appears,the GPS-PWV reaches its peak value,and the sharp decrease of the GPS-PWV suggests the decline or end of the precipitation.更多还原