中国沿海地基GPS水汽反演精度分析

发布时间：2018-04-26 08:59

本文选题：地基GPS + 无线电探空　；参考：《大地测量与地球动力学》2016年12期

【摘要】：利用无线电探空和地基水汽辐射计的观测数据,对中国沿海GPS观测网9个观测站反演的1h间隔可降水量进行对比分析。与无线电探空结果相比,地基GPS反演可降水量的年相关系数在0.95以上,平均偏差自北向南呈逐渐增大的趋势。除西沙站外,其他站的年平均偏差在2mm之内,均方差在3mm之内,且平均偏差和均方差存在季节性变化。与地基水汽辐射计结果相比,地基GPS反演可降水量同样具有很好的正相关,同步观测期间两者相关系数为0.989,两者的平均偏差为1.84mm,偏差的均方差为2.06mm,且7~9月的月均方差较大。
[Abstract]:Based on the observational data of radiosonde and ground-based water vapor radiometer, the 1 h precipitable water volume retrieved by 9 stations of GPS observation network in coastal China is compared and analyzed. Compared with radiosonde results, the annual correlation coefficient of precipitation retrieved by ground GPS is more than 0.95, and the average deviation increases gradually from north to south. Except Xisha station, the annual mean deviation is within 2mm, the mean deviation is within 3mm, and the mean deviation and mean variance have seasonal variation. Compared with the results of the water vapor radiometer, the GPS inversion of precipitable water on the ground also has a good positive correlation. The correlation coefficient is 0.989, the average deviation is 1.84 mm, the mean deviation is 2.06 mm, and the monthly mean deviation from July to September is larger.
【作者单位】：山东科技大学测绘科学与工程学院;国家海洋局第一海洋研究所;国家海洋环境预报中心;
【基金】：国家973计划(2012CB957704) 中国科学院海洋环流与波动重点实验室开放基金(KLOCAW1410)~~
【分类号】：P228.4;P412

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