GPS动态水汽反演对对流层天顶延迟解算精度分析

The precision analysis of kinematic atmospheric delay solution in kinematic GPS water vapor inversion

针对GPS动态水汽反演过程中对对流层天顶延迟解算精度的评估方法问题,提出了一种利用对流层延迟闭合和附合条件来评估对流层估计精度的方法。通过对PBO观测网中的12个CORS基站以及6个IGS基站的观测数据分析,分别从内符合精度和外符合精度两方面来评估动态对流层解算的精度。在内符合精度的数据处理上,使用事后精密星历,每15s计算一次相对对流层延迟数据。精度满足GPS动态水汽反演对天气预报的基本要求。在外符合精度的数据处理上,使用事后精密星历和超快星历分别对天顶方向对流层延迟进行处理,根据与静态参考值进行比对,两者结果高度吻合。研究结果对GPS动态水汽反演中动态对流层天顶延迟的解算具有重要的参考价值。

According to the method of assessing troposphere estimation precision in kinematic PGS water vapor inversion.The paper proposed a new method to assess troposphere estimation precision through tropospheric delay closing conditions and tropospheric delay connecting conditions.By analyzing PBO observation network＇s 12 CORS stations and 6IGS stations observation data to assess kinematic troposphere estimation precision through inner closed precision and external coincidence precision.Inner closed precision method in data processing,calculating the relative tropospheric delay results every 15 sby IGS ephemeris.Inner closed precision can meet the basic requirement weather forecast in GPS water vapor inversion.External coincidence precision method in data processing,calculating the tropospheric zenith delay by IGS ephemeris and IGU ephemeris,then compared with static reference result,found the results are highly consistent.This research has an important reference value for the precision of kinematic atmospheric delay solution in kinematic GPS water vapor inversion