利用BDS数据反演大气可降水量及其精度分析

随着GAMIT软件版本的不断更新,对BDS数据基线解算已成为可能。本文提出了一种基于GAMIT软件的BDS大气可降水量反演方法,并对利用探空数据计算得到的大气可降水量与GPS数据反演结果进行精度验证。结果表明,通过BDS反演得到的大气可降水量与探空数据计算结果之间的平均相对误差、均方根误差均小于2 mm,相关系数大于0.98;与GPS反演结果之间的平均相对误差、均方根误差均小于3 mm,相关系数大于0.96。BDS反演结果精度较高,基本能够满足气象需要。

Research on the accuracy of atmospheric precipitable water vapor with BDS

With the continuous update of the GAMIT software version, the processing of BDS data baseline settlement has become possible. In this paper, an inversion method of BDS atmospheric precipitable water vapor based on GAMIT software is proposed, and atmospheric precipitable water vapor calculated by using sounding data and based on the GPS is used to verify the accuracy. The experimental results show that the average relative error and root mean square error between atmospheric precipitable water vapor based on the BDS and calculated by using sounding data are less than 2 mm, and the correlation coefficient is greater than 0.98; the average relative error and root mean square error between atmospheric precipitable water vapor based on the BDS and based on the GPS are less than 3 mm, and the correlation coefficient is greater than 0.96. The BDS inversion results are highly accurate and basically meet the meteorological needs.