长距离单历元单频非差北斗网络差分方法  

Method of un-differential BDS network difference of long range at single epoch of single frequency

作　　者：祝会忠[1] 李博[1] 徐爱功[1] 高猛[1] 

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000

出　　处：《测绘科学》2016年第5期14-20,共7页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41504010;41474020);863计划项目(2014AA121501);2014年辽宁省博士启动基金项目(20141141);航天飞行动力学技术重点实验室开放基金项目(2014afdl005)

摘　　要：针对北斗卫星导航系统现有的网络差分方法多是基于GPS系统并采用双差定位模型,而双差定位模型的采用使得网络差分方法存在一些缺陷的问题,该文提出一种长距离单历元单频非差北斗网络差分方法;首先长距离北斗基准站网向覆盖区域内的北斗用户提供非差误差改正数;然后用户内插计算出自己所需的非差误差改正数,并改正北斗单频伪距观测值的误差;最后进行单历元单频网络差分定位。实验表明,该方法能够使用单历元单频伪距观测数据实现长距离北斗网络差分定位。The regional navigation constellation of BeiDou Navigation Satellite System has been constructed currently,and supply services of navigation and positioning independently in Asia-Pacific area.The accuracy of BDS pseudo-range positioning can be enhanced by the method of network difference.The double difference model is used mostly in the method of network difference with GPS,but the method of network difference has some faults by using the double difference model.A method of un-differential network difference between long range at single epoch with single-frequency data of BDS was proposed in this paper.Firstly the long range BDS base station networks supplied un-differential error corrections to BDS users which are covered by the regional networks.Then the un-differential error corrections which are requisite for users were calculated by themselves and the errors of BDS pseudo-range observations of singlefrequency were removed by these corrections.Finally the network difference positioning at single epoch with single-frequency was fulfilled.The result of test indicated that the positioning of BDS network difference between long range stations could be fulfilled at single epoch of single-frequency pseudo-range observations by this method.

关 键 词：长距离 非差误差改正数 单历元 基准站网 北斗用户 

分 类 号：P228.4[天文地球—大地测量学与测量工程]