BDS/GPS接收机系统间偏差稳定性分析  

Stability Analysis of Receiver ISB for BDS/GPS

作　　者：张辉[1] 郝金明[1] 田英国[1] 于合理[1] 周阳林 

机构地区：[1]信息工程大学导航与空天目标工程学院,郑州450001

出　　处：《天文学报》2017年第4期12-23,共12页Acta Astronomica Sinica

摘　　要：接收机系统间偏差(Inter-System Bias,ISB)稳定性分析对于了解ISB误差特性和建模预报具有重要意义.为了分析ISB的长期稳定性,选择MGEX(Multiple Global Navigation Satellite System Experiment)网2014—2016年每年各1周的数据,分别采用武汉大学和德国地学研究中心提供的精密钟差和轨道产品,利用BDS(Bei Dou Navigation Satellite System)/GPS(Global Positioning System)组合精密单点定位(Precise Point Positioning,PPP)计算测站的ISB值,并对ISB的日稳定性和周稳定性进行了深入分析.实验结果表明:ISB的日变化比较稳定,日标准差平均值约为0.5 ns.不同年份数据的ISB周平均值和周标准差的差异较大,并且ISB周平均值与测站的接收机类型有关.采用不同精密产品计算得到的ISB之间存在系统性偏差,对于同一周不同测站的ISB周平均值,该系统性偏差一致性较好.Stability analysis of receiver ISB （Inter-System Bias） is essential for understanding the feature of ISB as well as the ISB modelling and prediction. In order to analyze the long-term stability of ISB, the data from MGEX （Multi-GNSS Experi- ment） covering 3 weeks, which are from 2014, 2015 and 2016 respectively, are processed with the precise satellite clock and orbit products provided by Wuhan University and GeoForschungsZentrum （GFZ）. Using the ISB calculated by BDS （BeiDou Navigation Satellite System）/GPS （Global Positioning System） combined PPP （Precise Point Positioning）, the daily stability and weekly stability of ISB are investigated. The experimental results show that the diurnal variation of ISB is stable, and the average of daily standard deviation is about 0.5 ns. The weekly averages and standard deviations of ISB vary greatly in different years. The weekly averages of ISB are relevant to receiver types. There is a system bias between ISB calculated from the precise products provided by Wuhan University and GFZ. In addition, the system bias of the weekly average ISB of different stations is consistent with each other.

关 键 词：天体测量学 地球 技术 其他诸多方面 方法 数据分析 

分 类 号：P128[天文地球—天体测量]