区域GPS网实测电离层变化和卫星硬件延迟的可靠性研究  

A Research on the Reliability of Ionospheric VTEC and Satellite DCB from Regional GPS Network

作　　者：薛军琛[1,2] 宋淑丽[1] 朱文耀[1] 卢秀山[2] 

机构地区：[1]中国科学院上海天文台,上海200030 [2]山东科技大学测绘科学与工程学院,青岛266510

出　　处：《天文学报》2011年第4期310-321,共12页Acta Astronomica Sinica

基　　金：国家自然科学基金项目(10603011);863计划(2009AA12Z307);知识创新青年基金(5120090304)资助

摘　　要：根据高精度卫星导航定位的实际需要,介绍了利用中国GPS区域网双频相位平滑伪距实测数据,准实时监测区域网电离层电子总含量(TEC)变化和GPS卫星硬件延迟(DCB)的方法和结果.着重研究了区域网独立测定DCB的可靠性,利用中国境内的GPS站点分别构造了3个大小不同的区域网,通过实测DCB和垂直电子总含量(VTEC)与CODE(Center for Orbit Determination in Europe)结果的比对表明:为了获得区域网准实时测定DCB的可靠结果,对区域网的大小有一定的要求;利用中国GPS区域网,准实时测定的VTEC和DCB的比较精度可达2.0 TECu和0.25 ns.According to the requirement of high-precision satellite navigation, the method and result of quasi-real-time monitoring the variation of the regional ionospheric TEC （total electron content） and GPS satellite differential code bias （DCB） are introduced. The pseudorange data smoothed by dual-frequency carrier phase are used from the GPS networks in China. Especially, the feasibility of retrieving DCB independently from the regional GPS networks with different sizes is studied. Three networks based on the GPS stations in China are constructed. The comparison of the computed DCB and VTEC （vertical total electron content） with those of CODE （Center for Orbit Determination in Europe） shows that it is necessary to consider the size of regional network in order to obtain the reliable result of local quasi-real-time measured DCB; the compared precisions of the regional quasi-real-time measured VTEC and DCB are about 2.0 TECu and 0.25 ns, respectively.

关 键 词：天体测量 地球 大气 方法 解析 

分 类 号：P128[天文地球—天体测量]