BDS/GPS组合天顶对流层延迟估计的精度分析  

Analysis on performance of estimating zenith tropospheric delays for combined BDS/GPS

作　　者：唐龙江[1] 徐爱功[1] 徐宗秋[1,2] 李磊[1] 

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000 [2]武汉大学卫星导航定位技术研究中心,武汉430079

出　　处：《导航定位学报》2017年第3期52-56,共5页Journal of Navigation and Positioning

基　　金：国家863计划项目(2014AA121301);国家青年基金项目(41504030;41504010);辽宁省教育厅科学研究一般项目(L2014139);辽宁省科技厅博士启动基金项目(201501126)

摘　　要：为了详细分析BDS/GPS组合ZTD的精度,选取8个MGEX跟踪站2014年6月至9月的观测数据,利用精密单点定位法分别在未固定跟踪站坐标和固定跟踪站坐标的情况下估计BDS ZTD、GPS ZTD和BDS/GPS组合ZTD,并与IGS提供的对流层产品进行对比分析。实验结果表明:BDS ZTD现阶段的标准差优于34mm,GPS ZTD与BDS/GPS组合现阶段的标准差相当,均优于14mm;与未固定跟踪站情形下估计的BDS ZTD相比,固定跟踪站坐标的方式虽然可以提高利用BDS估计ZTD的稳定性,但不能提高精度。In order to further analyze the accuracy of BDS/GPS ZTD,the paper selected the data of 8 MGEX stations during the period of June to September 2014,used PPP to estimate BDS ZTD,GPS ZTD and BDS/GPS ZTD under the conditions of fixed and unfixed station coordinates respectively,and analytically compared with the tropospheric products of IGS.Experimental result showed that currently the standard deviation of BDS ZTD could be better than 34 mm,and that of GPS ZTD would be similar with combined BDS/GPS on 14 mm or better;moreover,compared with BDS ZTD under the unfixed MEGX station,the way of fixed station could improve the estimation stability of BDS ZTD,but not the accuracy.

关 键 词：BDS/GPS组合 天顶对流层延迟 精密单点定位 IGS对流层产品 

分 类 号：P228[天文地球—大地测量学与测量工程]