多频多模接收机差分码偏差的精密估计与特性分析  

Precise Estimation and Characteristic Analysis of Multi-GNSS Receiver Differential Code Biases

作　　者：袁运斌[1] 张宝成[1] 李敏 YUAN Yunbin;ZHANG Baocheng;LI Min(State Key Laboratory of Geodesy and Earth's Dynamics,Institute of Geodesy and Geophysics Chinese Academy of Sciences,Wuhan 430077,China)

机构地区：[1]中国科学院测量与地球物理研究所动力大地测量学国家重点实验室

出　　处：《武汉大学学报（信息科学版）》2018年第12期2106-2111,共6页Geomatics and Information Science of Wuhan University

基　　金：国家重点研发计划(2016YFB0501900);国家自然科学基金(41674022,41604031);王宽诚率先人才计划卢嘉锡国际团队项目~~

摘　　要：全球导航卫星系统(Global Navigation Satellite System,GNSS)探测大气电离层需要精确处理由接收机差分码偏差(differential cade bias,DCB)引起的系统误差。准确掌握接收机DCB的多时间尺度精细变化等特性是联合美国GPS、中国北斗卫星导航系统(BeiDou navigation satellite system,BDS)和欧盟Galileo等多GNSS技术监测电离层所面临的主要科学问题之一。为此,提出了基于零基线精密估计站间单差接收机DCB的方法,并对站间单差接收机DCB的日加权平均值进行了分析。基于4台多模接收机采集于2013年的双频观测值,揭示了站间单差接收机DCB的变化可能受3种因素的影响,即接收机内置软件的版本升级(实验中引起了约3ns的显著增加)、拆卸个别接收机所导致的观测条件改变(实验中引起了约1.3ns的显著减少)和估计方法的误差(引起了与导航系统卫星几何结构重复性相一致的周期性变化)等。Pseudorange observations of Global Navigation Satellite System(GNSS) are well known to be affected by receiver differential code biases(DCBs), which need to be precisely calibrated for pseudo-range-based ionospheric sensing. It is therefore of importance to ascertain the intrinsic characteristics of receiver DCBs in the context of new-generation GNSS based on Global Positioning System(GPS), BeiDou satellite navigation system(BDS) and Galileo. In this contribution, we present a method that enables time-wise retrieval of between-receiver DCBs(BR-DCBs) from code measurements collected by a zero-baseline setup. Based on dual frequency measurements collected in 2013 by four receivers, we conclude that the variation of BR-DCBs may be affected by three factors, namely, the version update of the receiver’s firmware, the observation conditions caused by the disassembly of individual receivers, and errors in the estimation method.

关 键 词：GPS BDS GALILEO 电离层 接收机差分码偏差 零基线 

分 类 号：P228[天文地球—大地测量学与测量工程]