摘要
为了进一步提高南极洲大陆冰雪覆盖变化监测的精度,探讨南极洲天顶对流层延迟(ZTD)高精度估计方法:基于北斗三号全球卫星导航系统(BDS-3),提出利用双差(DD)法和精密单点定位(PPP)法进行高精度估计南极洲地区多模全球卫星导航系统(GNSS)实验跟踪网(MGEX)测站;然后分别将2种方法估计的ZTD值与国际GNSS服务组织(IGS)分析中心发布的ZTD产品进行对比分析,并综合评估2种方法估计ZTD值的精度。实验结果表明:提出的2种方法在南极洲地区估计MGEX测站ZTD值均可达到毫米级精度,其中,DD网络法估计MGEX测站ZTD值的精度更高,但时效性和独立性较差,PPP法则更具有时效性和独立性。
In order to further improve the monitoring accuracy of ice and snow cover change in Antarctica,the paper discussed on the high precision estimation method of zenith tropospheric delay(ZTD)in Antarctica:based on the BDS-3 global navigation satellite system(BDS-3),double difference(DD)method and precise single point positioning(PPP)method were used to perform the high-precise estimation for the multi-global navigation satellite system(GNSS)experiment(MGEX)stations in Antarctica;then,the ZTD values estimated by the two methods were compared with the ZTD products published by the International GNSS Service(IGS)Analysis Center,and the accuracy of the ZTD values estimated by the two methods was comprehensively evaluated.Experimental results showed that the proposed methods could both reach millimeter-level accuracy in estimating ZTD values of MGEX stations in Antarctica,among them,DD network method would have higher accuracy in estimating ZTD values of MGEX stations,but with less timeliness and independence,while PPP method would be more timeliness and independence.
作者
方卓
魏僮
房海若
张兵良
FANG Zhuo;WEI Tong;FANG Hairuo;ZHANG Bingliang(Nanjing Shuwei Surveying and Mapping Co.Ltd.,Nanjing 211808,China;School of Transportation and Geomatics Engineering,Shenyang Jianzhu University,Shenyang 110168,China;School of Materials Science and Engineering,North University of China,Taiyuan 030051,China;College of Public Administration,Nanjing Agricultural University,Nanjing 210095,China)
出处
《导航定位学报》
CSCD
北大核心
2024年第6期138-144,共7页
Journal of Navigation and Positioning
基金
国家自然科学基金项目(42271106,42471301)。
