不同星历反演大气可降水量的时间序列分析  

Time series analysis of retrieving atmospheric precipitable water vapor with different ephemeris

作　　者：杜飞 郑南山[1] 孙菲浩 DU Fei;ZHENG Nanshan;SUN Feihao(China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]中国矿业大学

出　　处：《测绘科学》2019年第9期42-46,72,共6页Science of Surveying and Mapping

摘　　要：针对地基GPS水汽探测过程中星历文件的选取对最终反演结果影响的问题,该文利用探空资料建立了一种新的香港季度加权平均温度计算公式,采用3种不同星历对GPS观测数据进行基线解算。通过MATLAB对反演的大气可降水量进行时间序列分析,3种不同星历反演的大气可降水量与探空数据的结果相似,均方差非常接近,快速星历与最终精密星历反演精度基本一致,超快速星历与最终精密星历的反演精度接近。此结果表明:不同星历的选取能够对最终反演结果产生影响,但影响可以近似忽略;最终精密星历可用于事后的高精度水汽反演,分析水汽的变化规律;快速星历结果可用于时效性快的水汽探测;超快速星历用于实时水汽探测,成为水汽探测的手段之一。To solve the problem that the ephemeris file affected the final inversion result during the ground-based GPS water vapor detection process,this paper used the sounding data to establish a new Hong Kong weighted average temperature calculation formula,three different ephemeris were used to perform baseline calculation on GPS observation data.And time series analysis of inversion atmospheric precipitation was performed by MATLAB,the atmospheric precipitation in three different ephemeris inversions was similar to the sounding data,and the mean squared deviation was very close,the accuracy of the inversion results of the fast ephemeris and the final precision ephemeris was basically the same,and the inversion results of the ultra-fast ephemeris and the final precise ephemeris were close.This result indicated that the selection of different ephemeris could have an effect on the final inversion result,but the impact could be approximated.The final precision ephemeris could be used for high-precision water vapor inversion to analyze the variation law of water vapor;the fast ephemeris results could be used for water vapor detection with fast timeliness;the ultra-fast ephemeris was used for real-time water vapor detection and became one of the means of water vapor detection.

关 键 词：超快速星历 大气可降水量 时间序列 GPS 

分 类 号：P228.4[天文地球—大地测量学与测量工程]