BDS／GPS联合动态差分定位  

Kinematic Differential Positioning with Combination of BDS and GPS

作　　者：秦显平[1,2] 曾安敏[1,2] 

机构地区：[1]西安测绘研究所,陕西西安710054 [2]地理信息工程国家重点实验室,陕西西安710054

出　　处：《测绘科学与工程》2015年第3期1-5,共5页Geomatics Science and Engineering

基　　金：基金项目：国家自然科学基金资助项目（41274040,41374019,41474015）.

摘　　要：本文研究了BDS／GPS联合动态差分定位方法，指出在采用广播星历时需注意BDS与GPS的椭球参数不同及星历计算方法不同，提出采用公共位置参数分别计算BDS与GPS接收机钟差以消除两个系统间的时间误差。分析了不同权比对BDS／GPS联合动态差分定位的影响，指出由于差分定位减小了导航星历等系统性误差的影响，因此权值对联合定位的结果影响较小。静态站实测数据计算结果表明：BDS／GPS联合动态定位精度优于单GPS系统的定位精度，并且随着基线长度的增加，精度提高更加明显。机载实测数据计算结果表明：BDS／GPS联合动态差分定位无论在定位有效个数还是在精度上都好于单GPS系统和单BDS系统，动态定位精度优于10厘米。This paper studies the method of kinematic differential positioning with combination of BDS and GPS data. First- ly, the paper points out that the ellipsoid parameter and the broadcast ephemeris algorithm of BDS and GPS are different when u- sing broadcast ephemeris. Then the paper discusses the receiver clock error of BDS and GPS according to the common position pa- rameters to eliminate the time errors produced by the differences of BDS and GPS. Finally it analyzes the influence of various weight ratios on the kinematic differential positioning with combination of BDS and GPS. The results show that the position accu- racy of BDS/GPS is higher than that of single GPS, and it improves significantly with the increase of baseline length. The results from airplane testing show that the kinematic differential positioning with combination of BDS/GPS are better than those of single GPS and single BDS and the accuracy of kinematic differential positioning is better than 10cm.

关 键 词：动态相对定位 GPS BDS 

分 类 号：P228[天文地球—大地测量学与测量工程]