BDS+GPS手持机支持下的网格伪距差分定位  

Research of Grid Pseudo-range Differential Positioning Based on BDS+GPS Handset

作　　者：周万振 秘金钟[2] 李得海[2] 方书山[2] 张晶晶[3] 陈振 张涛[1,2] 

机构地区：[1]山东科技大学,山东青岛266590 [2]中国测绘科学研究院,北京100830 [3]四川省第一测绘工程院,四川成都610100 [4]青岛市勘察测绘研究院,山东青岛266000

出　　处：《测绘通报》2017年第2期1-5,共5页Bulletin of Surveying and Mapping

基　　金：国家自然科学基金(41304030);科技部863计划(2015AA124001);国家重点研发计划(2016YFB0502105;2016YFB0501801);北斗分析中心(GFZX0301040308-06);中国测绘科学研究院基本科研业务费(7771604);国家测绘地理信息局科技项目(2016KJ0200);四川省北斗实时亚米级智能位置服务关键技术研究项目(2016KJ0205)

摘　　要：我国各省CORS站建设逐步完善,以及我国BDS卫星导航系统在亚太区域提供服务,促进了BDS+GPS双模融合伪距差分定位的研究和发展。目前,在PC机上伪距差分定位早已实现,且算法也已经比较成熟,但在移动终端上进行BDS+GPS双模融合伪距差分定位向用户提供服务方面还比较薄弱,针对这一问题,本文提出了将网格伪距差分定位算法嵌入到手持机,并且实现了手持机实时网格伪距差分定位。本文阐述了方法原理并进行了车载试验分析,结果表明,在与TBC软件动态解算结果作为已知准确值的外符合精度方面,手持机BDS+GPS双模融合网格伪距差分定位结果的水平精度为0.522 1 m,在水平方向上可以达到亚米级定位精度。The construction of CORS stations in China has been gradually improved and China＇s BDS satellite navigation system has provided services in the Asia-Pacific region.So the integration of BDS/GPS dual-mode pseudo-range differential positioning research and development is promoted.Now the pseudo-range differential positioning based on personal computer has been realized and the algorithm has also been relatively mature,but the technology based on mobile terminal to provide users with services is still relatively weak.Considering this deficiency,the grid pseudo-range differential positioning algorithm embedded in the handset was proposed,and this thought was achieved.In this paper the principle of this method was introduced and the vehicle test was analysed.Compared with the dynamic TBC results which known as true value,the results showed that the external accord accuracy of test data was 0.522 1 m and could achieve sub-meter accuracy on the horizontal direction.

关 键 词：手持机 网格中心点改正数 伪距差分 BDS+GPS双模融合 

分 类 号：P228.4[天文地球—大地测量学与测量工程]