对流层延迟在GAMIT解算短基线的应用分析

以华南沿海地区短基线GNSS-C级网为例,使用GAMIT软件,分别采用对流层延迟估计与对流层延迟不估计的解算策略,选取丘陵地区、海岛地区、平原地区三个区域短基线向量数据作为样例,比较分析两种策略在不同地理环境下的短基线数据解算精度,并结合整个短基线全球卫星导航系统（GNSS）控制网的数据进行解算分析．试验结果显示,对流层延迟估计与对流层延迟不估计的解算策略在三个区域的基线U分量精度均良好,但后者精度优于前者．整网的基线重复性方面,对流层延迟估计与对流层延迟不估计的解算策略精度均良好,但前者精度略优于后者. 

Analysis of tropospheric delay application in GAMIT short baseline calculation

In this paper short baseline vector data of plain area, hilly area and island area from GNSS-C network in the coastal areas of south China are selected .Two different estimation strategy with and without tropospheric delay estimation are used to estimate the accuracy of data process in different geographic environment,? The experimental results show that both the accuracy U component with? tropospheric delay estimation and without tropospheric delay estimation are good in the three regions, but the accuracy of the latter is better than the former.In terms of baseline repeatability of the whole network, the accuracy of solution with tropospheric delay estimation and without the estimation of tropospheric delay is good, but the accuracy of the former is slightly better than the latter.