基于BDS/GPS组合的短基线相对定位性能分析  

Performance analysis of short baseline relative positioning based on integrated BDS/GPS

作　　者：陈健[1] 赵兴旺[1] 刘超[1] 张翠英[1] 

机构地区：[1]安徽理工大学测绘学院,安徽淮南232001

出　　处：《合肥工业大学学报（自然科学版）》2017年第2期192-196,共5页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(41404004;41474026);安徽省自然科学基金资助项目(1408085QD72);安徽省博士后基金资助项目(2015B044);安徽理工大学校青年基金资助项目(QN201512)

摘　　要：基于北斗卫星导航系统/全球定位系统(BeiDou Navigation Satellite System/Global Positioning System,BDS/GPS)组合定位的时空基准统一,文章详细介绍了BDS/GPS定位的函数模型和随机模型。在载波相位相对定位的算法基础上,编写BDS/GPS组合定位程序处理实测BDS/GPS短基线数据,从空间位置精度因子(position dilution of precision,PDOP)、整周模糊度固定以及定位精度等多方面分析BDS/GPS组合定位的性能。结果表明:BDS/GPS组合的PDOP值要小于单个系统的值,而且稳定性好,双系统的观测精度好于单个系统;BDS/GPS组合的短基线相对定位中单历元模糊度固定率高达98%,比GPS、BDS单系统单历元模糊度固定率分别提高了4.3%和21.0%。BDS/GPS组合的短基线定位精度在E、N方向定位结果优于1cm,U方向定位结果优于2cm,比单GPS系统在E、N方向定位精度分别提高25%、4.7%,在U方向定位精度提高12.8%。Based on the benchmark unity of space and time in BeiDou Navigation Satellite System/Glob- al Positioning System（BDS/GPS） integrated positioning, the BDS/GPS function model and stochastic model are introduced. On the basis of the algorithm of carrier phase relative positioning, the BDS/ GPS integrated positioning program is written to process the measured BDS/GPS short baseline data. Finally, the performance of the BDS/GPS integrated positioning is analyzed from the perspectives of space position dilution of precision（PDOP）, fixation of integer ambiguity and positioning accuracy. The results show that the PDOP value of BDS/GPS integration is less than the value of a single sys- tem and has better stability, and the observation precision of dual system is better than that of a single system. In the short baseline relative positioning of BDS/GPS integration, the single-epoch ambiguity fixed rate can reach up to 98%. Comparing with GPS and BDS single system, it increases by 4.3% and 21.0% respectively. The accuracy of short baseline positioning of BDS/GPS integration is better than 1 cm at E and N directions and 2 cm at U direction. Comparing with GPS single system, the po- sitioning accuracy increases by 25%, 4. 7% and 12.8% correspondingly.

关 键 词：BDS/GPS组合定位 数学模型 整周模糊度 精度分析 

分 类 号：P228[天文地球—大地测量学与测量工程]