BeiDou、Galileo、GLONASS、GPS多系统融合精密单点

随着中国BeiDou系统与欧盟Galileo系统的出现以及俄罗斯GLONASS系统的恢复完善,过去单一的GPS导航卫星系统时代已经逐步过渡为多系统并存且相互兼容的全球性卫星导航系统（multi-constellation global navigation satellite systems,multi-GNSS）时代,多系统GNSS融合精密定位将成为未来GNSS精密定位技术的发展趋势。本文采用GPS、GLONASS、BeiDou、Galileo 4大卫星导航定位系统融合的精密单点定位（precise point positioning,PPP）实测数据,初步研究并分析了4系统融合PPP的定位...

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Bibliographic Details
Published inCe hui xue bao Vol. 44; no. 12; pp. 1307 - 1313
Main Author 任晓东 张柯柯 李星星 张小红
Format Journal Article
LanguageChinese
English
Published Beijing Surveying and Mapping Press 01.12.2015
武汉大学测绘学院,湖北武汉,430079%武汉大学测绘学院,湖北武汉430079
德国地学研究中心,波茨坦14473
Subjects
Accuracy
BeiDou
BeiDou Navigation Satellite System
Convergence
Elevation angle
Galileo
Galileo satellite system (Europe)
Global navigation satellite system
Global positioning systems
GLONASS
GPS
Horizontal orientation
Navigation systems
Satellite constellations
Satellite navigation systems
Satellites
多频多系统
精密单点定位
精度与收敛速度
精度与收敛速度
精密单点定位
GLONASS
多频多系统
accuracy and convergence rate
multi-frequency and multi-system
BeiDou
GPS
PPP (precise point positioning)
Galileo
Online AccessGet full text
ISSN1001-1595
1001-1595
DOI10.11947/j.AGCS.2015.20140568

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Summary:随着中国BeiDou系统与欧盟Galileo系统的出现以及俄罗斯GLONASS系统的恢复完善,过去单一的GPS导航卫星系统时代已经逐步过渡为多系统并存且相互兼容的全球性卫星导航系统（multi-constellation global navigation satellite systems,multi-GNSS）时代,多系统GNSS融合精密定位将成为未来GNSS精密定位技术的发展趋势。本文采用GPS、GLONASS、BeiDou、Galileo 4大卫星导航定位系统融合的精密单点定位（precise point positioning,PPP）实测数据,初步研究并分析了4系统融合PPP的定位性能。试验结果表明：在单系统观测几何构型不理想的区域,多系统融合能显著提高PPP的定位精度和收敛速度。4大系统融合的PPP收敛速度相对于单GNSS可提高30%~50%,定位精度可提高10%~30%,特别是对高程方向的贡献更为明显。此外,在卫星截止高度角大于30°的观测环境下,单系统由于可见卫星数不足导致无法连续定位,而多系统融合仍然可以获得PPP定位结果,尤其是水平方向具有较高的定位精度。这对于山区、城市以及遮挡严重的区域具有非常重要的应用价值。
Bibliography:PPP（precise point positioning）; accuracy and convergence rate; BeiDou; Galileo; GLONASS; GPS; multi-frequency and multi-system
11-2089/P
REN Xiaodong;ZHANG Keke;LI Xingxing;ZHANG Xiaohong （1. School of Geodesy and Geomatics, Wuhan University, Wuhan 4：30079, China; 2. German Research Centre for Geosciences （GFZ）, Potsdam 14.473, Germany）
With the appearance of China＇s BeiDou system and EU＇s Galileo system and the restoration and improvement of Russia＇s GLONASS navigation system,the single GPS navigation satellite system has been gradually developed into multi-GNSS（multi-constellation global navigation satellite systems）.Multi-GNSS with precise positioning will become the development trend of GNSS precise positioning in the future.Using the observation data collected by PPP（precise point positioning）,which integrates the four major satellite navigation systems of GPS、GLONASS、BeiDou and Galileo,this paper conducts a preliminary study and analyzes the positioning performance of multi-system PPP.According to the experiment,in areas where single system observation geometrical configuration is unsatisfactory,multi-system integration can greatly improve the positioning accuracy and convergence rate of PPP.The convergence rate of multi-constellation PPP is 30%to50% higher than that of single GPS,and the positioning accuracy can also be improved 10%to 30%,especially in terms of elevation direction.Besides,under observation circumstance where the end elevation angle of satellite is larger than 30 degrees,single GPS fails to carry out continuous positioning due to lack of visible satellites,while multi-constellation PPP can still get positioning results,with relatively high accuracy in horizontal direction especially.
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ISSN:1001-1595
1001-1595
DOI:10.11947/j.AGCS.2015.20140568