摘要
首先分析了GRACE-A、GRACE-B、FY3C 3颗低地球轨道(low earth orbit,LEO)卫星对于提升北斗卫星导航系统(BeiDou navigation satellite system,BDS)卫星和GPS卫星可见性的影响,其中BDS中圆地球轨道(medium earth orbit,MEO)卫星的提高最为显著,一重覆盖弧段提高了45.7%,四重覆盖弧段提高了10.7%,与GPS卫星相当。然后利用卫星位置精度衰减因子(satellite position dilution of precision,SPDOP)分析了LEO卫星对导航卫星定轨观测几何结构的增强作用。加入LEO卫星后,BDS地球静止轨道(geostationary earth orbit,GEO)卫星SPDOP值下降了49%;倾斜地球同步轨道(inclined geosynchronous orbit,IGSO)卫星SPDOP值下降了39.8%;MEO卫星SPDOP值下降了34.9%;GPS卫星SPDOP值下降了41.2%。最后利用7个区域监测站和3颗LEO卫星的实测数据分析了LEO卫星对导航卫星轨道精度的提升,GPS卫星轨道的外符合一维均方根(one-dimensional root mean square,1D RMS)由14.4 cm提高到10.2 cm,提高了29.1%;BDS的GEO卫星轨道重叠弧段1D RMS由359.8 cm提高到90.5 cm,提高了74.8%;IGSO卫星由175.6 cm提高到52.1 cm,提高了70.3%;MEO卫星由90.5 cm提高到30.4 cm,提高了66%。
Firstly,the influence of the improvement of the BeiDou navigation satellite system(BDS)and GPS satellites visibility using the three low earth orbit(LEO)satellites GRACE-A/B and Fengyun3 C(FY3 C)is analyzed.Results show that the improvement to BDS medium earth orbit(MEO)satellites is the most significant,with the single coverage increased by 45.7%and quad-coverage increased by 10.7%,which is equivalent to that of GPS satellites.Then,satellite positioning and dilution of precision(SPDOP)is used to analyze the contribution of LEO satellites to enhance the geometry structure in navigation satellite orbit determination.With the enhancement of three LEO satellites,the SPDOP of the BDS geostationary orbit(GEO)satellites,inclined geosynchronous orbit(IGSO)satellites,MEO satellites and GPS satellites are decreased by 49%,39.8%,34.9%and 41.2%respectively.The orbit determination experiment based on the observations from seven regional ground observation stations and three LEO satellites are carried out.The results show that one-dimensional root mean square(1 D RMS)of GPS satellites orbit is reduced from 14.4 cm to 10.2 cm,improved by 29.1%.The 1 D RMS of BDS GEO,IGSO and MEO satellites in overlapping arcs decrease from 359.8 cm to 90.5 cm,175.6 cm to 52.1 cm,and 90.5 cm to 30.4 cm,improved by 74.8%,70.3%,and 66%respectively.
作者
杨宇飞
杨元喜
徐君毅
许扬胤
赵昂
YANG Yufei;YANG Yuanxi;XU Junyi;XU Yangyin;ZHAO Ang(Institute of Geographical Spatial Information,Information Engineering University,Zhengzhou 450001,China;Beijing Satellite Navigation Center,Beijing 100094,China;Xi’an Research Institute of Surveying and Mapping,Xi’an 710054,China;State Key Laboratory of Geo‐Information Engineering,Xi’an 710054,China)
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2020年第1期46-52,共7页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金(41374019)
国家重点研发计划(2016YFB0501700,2016YFB0501701).
关键词
低地球轨道卫星
卫星位置精度衰减因子
轨道测定
轨道增强
北斗卫星导航系统
low earth orbit satellite
satellite position dilution of precision
orbit determination
orbit en-hancement
BeiDou navigation satellite system
