BDS/GPS伪距相位联合定位对病态性改善程度分析  

Analysis of the Degree of Ill Posedness Improvement in BDS/GPS System Combined Positioning of Pseudo-range and Carrier Phase Positioning

作　　者：邱晓璐 刘根友 曲绍杰 QIU Xiaolu;LIU Genyou;QU Shaojie(Yantai Gold College, Zhaoyuan Shandong 265400, China;CAS Innovation Academy for Precision Measurement Science and Technology, Wuhan Hubei 430077, China;Zhaojin Mining Company Limited Xiadian Gold Mine, Zhaoyuan Shandong 265400, China)

机构地区：[1]烟台黄金职业学院,山东招远265400 [2]中国科学院精密测量科学与技术创新研究院,湖北武汉430077 [3]招金矿业股份有限公司夏甸金矿,山东招远265400

出　　处：《北京测绘》2021年第10期1343-1347,共5页Beijing Surveying and Mapping

基　　金：国家自然科学基金(41321063);大地测量与地球动力学国家重点实验室开放基金(SKLGED2013-4-1-Z)。

摘　　要：针对北斗卫星导航系统(BeiDou Navigation Satellite System,BDS)/全球卫星导航系统(Global Positioning System,GPS)载波相位定位的病态性,提出采用伪距观测来改善上述问题,并对比分析了在我国8个地面站不同精度伪距观测量的引入对载波相位定位病态性的改善效果,这种病态特征可以通过伪距与载波相位联合观测得到的法方程条件数表示。实验结果表明:伪距观测对载波相位定位的病态性有很大程度的改善,且BDS系统的改善程度比GPS更大;伪距观测精度越高,联合定位的病态性程度越弱;在较短的观测时间内,伪距观测量的引入,对载波相位定位病态性的改善效果非常明显。According to ill posedness of BDS/GPS carrier phase positioning,it presented the pseudo-range observations to improve the ill posedness of carrier phase positioning.The effect of the different precision pseudo-range observations improving carrier phase positioning at the eight ground stations in our country was also studied.The above characteristic of ill posedness was showed by the condition number of normal equation which was obtained by combined positioning of pseudo-range and the carrier phase positioning.The results indicated that pseudo-range observations had significantly improved the ill posedness of carrier phase positioning.The degree of BDS improvement was greater than GPS.The higher was the pseudo-range observation precision,the weaker was the ill posedness of combined positioning.In the relatively short observation periods,the effect of introduction of pseudo-range observations improving the ill posedness of carrier phase positioning was obvious.

关 键 词：北斗卫星导航系统(BDS) 全球卫星导航系统(GPS) 伪距 载波相位定位 联合定位 病态性 条件数 

分 类 号：P228.4[天文地球—大地测量学与测量工程]