GPS动态水汽反演对对流层天顶延迟解算精度分析

发布时间：2018-01-18 10:20

本文关键词：GPS动态水汽反演对对流层天顶延迟解算精度分析　出处：《测绘科学》2017年01期 　论文类型：期刊论文

【摘要】：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。
[Abstract]:This paper aims at evaluating the accuracy of tropospheric zenith delay calculation in the process of GPS dynamic water vapor inversion. This paper presents a method to evaluate the accuracy of tropospheric estimation by using the condition of tropospheric delay closure and attachment. The observation data of 12 CORS base stations and 6 IGS base stations in the PBO observation network are analyzed. The accuracy of dynamic tropospheric solution is evaluated from two aspects of internal coincidence accuracy and external coincidence precision respectively. In the data processing of inner coincidence precision, the post-precision ephemeris is used. The relative tropospheric delay data are calculated every 15 s. The accuracy meets the basic requirement of GPS dynamic water vapor inversion for weather forecast. The tropospheric delay in the zenith direction is processed by the precise ephemeris and the ultrafast ephemeris respectively, and compared with the static reference values. The two results are in good agreement with each other. The results are of great reference value to the calculation of dynamic tropospheric zenith delay in GPS dynamic water vapor inversion.
【作者单位】：西南交通大学地学学院测绘系;
【基金】：国家自然科学基金项目(41274044)
【分类号】：P228.4;P412
【正文快照】： 0引言GPS气象学是近几年新发展起来的一门学科,它研究的主要内容是GPS水汽反演及其相关应用[1-3]。而GPS水汽反演精度主要取决于对流层延迟估计精度[4-7]。GAMIT软件中的TRACK模块,是对单条基线的相对对流层延迟差值进行估计,每个测站的投影函数均为GMF模型[8]。为检验对流层

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