虚拟星基测控站对BDS测控网的增强作用  

Augmentation of Virtual Satellite TT&C Station to BDS TT&C Network

作　　者：李克昭[1] 丁安民[1] 郑红晓 马卫华[3] 

机构地区：[1]河南理工大学测绘与国土信息工程学院,河南焦作454000 [2]河南省中纬测绘规划信息工程有限公司,河南焦作454000 [3]西北工业大学航天学院,陕西西安710072

出　　处：《测绘科学技术学报》2014年第3期221-225,共5页Journal of Geomatics Science and Technology

基　　金：国家自然科学基金项目(41202245;41272373);国家杰出青年基金项目(50525414);河南理工大学博士基金/骨干教师资助项目(B2009-29;649203)

摘　　要：针对北斗卫星导航系统(BDS)陆基测控站布局有限的问题,提出了以BDS GEO和IGSO卫星作为虚拟星基测控站的方法来提高BDS MEO卫星的监测覆盖率和改善定轨精度的思路。文中给出了星基测控站对MEO卫星的可视判别与覆盖率计算模型,并引入了卫星导航定位精度衡量指标PDOP作为测控网定轨精度的评价依据。仿真计算结果表明:虚拟星基测控站的方法将MEO卫星的监测覆盖率从国内陆基测控站的30%左右提高到100%;定轨方面克服了地基测控站空间几何分布有限、观测方程病态、法方程秩亏而难于求解的困难,实现了全周期内能够定轨测量和解算,并改善了BDS MEO卫星的定轨精度。In order to overcome the limitation of building telemetry, tracking, and command （ TT＆amp;C） stations in Chinese internal ground, a novel method by using geostationary orbit （ GEO） satellites and inclined geostationary orbit （ IGSO） satellites as virtual satellite TT＆C stations, was proposed in this paper. The coverage rate and the or-bit determination precision of the middle earth orbit （ MEO） satellite of BeiDou Navigation Satellite System （ BDS） were improved by using this method. The visibility and coverage rate calculation model of BDS MEO satellite to vir-tual satellite TT＆amp;C stations was deduced. And the orbit determination precision of TT＆amp;C network was synthesized by the position dilution of precision （ PDOP） of Global Navigation Satellite System （ GNSS） . The simulation results show that the coverage rate of the method by using virtual satellite TT＆C stations was improved from thirty percent of the method by using ground station alone to one hundred percent. And the results also show that the disadvanta-ges, such as the coverage areas limitation of ground station alone, ill-pose equation, deficient-rank etc, were over-come. Moreover, the observations and calculations of orbit determination for BDS MEO satellites were completed all the time. So the orbit determination precision of BDS MEO satellite was improved greatly by using the method proposed in this paper.

关 键 词：星基虚拟测控站 可见性 定轨 北斗卫星导航系统 增强 

分 类 号：P228[天文地球—大地测量学与测量工程]