偏航姿态对北斗精密单点定位的影响分析

叶世榕; 夏凤雨; 赵乐文; 夏朋飞; 陈德忠

doi:10.11947/j.AGCS.2017.20170094

测绘学报 >

2017 , Vol. 46 >Issue 8: 971 - 977

DOI: https://doi.org/10.11947/j.AGCS.2017.20170094

大地测量学与导航

偏航姿态对北斗精密单点定位的影响分析

叶世榕 ,
夏凤雨 ,
赵乐文 ,
夏朋飞 ,
陈德忠

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武汉大学卫星导航定位技术研究中心, 湖北武汉 430079

叶世榕(1974-),男,教授,博士生导师,研究方向为GNSS精密定位与地基GNSS气象学。E-mail:srye@whu.edu.cn

收稿日期: 2017-02-27

修回日期: 2017-04-26

网络出版日期: 2017-09-01

基金资助

国家重点研发计划（2016YFB0800405）；福建省社会发展引导性资助项目（2016Y0002）；福建省测绘地理信息局科技创新资助项目（2016J01）；水利部公益性行业科研专项经费（201401072）

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Impact Analysis of Yaw Attitude on BDS Precise Point Positioning

YE Shirong ,
XIA Fengyu ,
ZHAO Lewen ,
XIA Pengfei ,
CHEN Dezhong

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Research Center of GNSS, Wuhan University, Wuhan 430079, China

Received date: 2017-02-27

Revised date: 2017-04-26

Online published: 2017-09-01

Supported by

The NatioalKey Scientific Research Project(No. 2016YFB0800405);Fujian Province Social Development Guided Subsidy Project(No. 2016Y0002);The Science and Technology Innovation Project of Fujian Provincial Administration of Surveying, Mapping and Geoinformation(No. 2016J01);The Non-profit Industry Financial Program of MWR (No.201401072)

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摘要

当太阳相对于卫星轨道面的高度角较小时，北斗导航卫星将不会跟踪太阳位置，卫星姿态发生异常复杂的变化后一段时间内处于零偏模式。在此期间采用名义姿态将影响卫星天线相位中心偏差、相位缠绕等误差计算，进而使精密单点定位（PPP）参数估计和天顶对流层延迟估计出现偏差。研究表明，在北斗导航卫星处于零偏期间，采用名义姿态计算的相位缠绕、天线相位中心偏差中存在超过15cm的误差。在此期间的北斗卫星采用零偏姿态改正相位缠绕等误差，与采用名义姿态相比，动态PPP位置参数N、E、U的估计精度可以提高53.2%、54.2%、39.3%，静态PPP位置参数N、E、U的估计精度可以提高61.0%、72.3%、58.4%，天顶对流层延迟估计精度提高33.0%。

关键词： 零偏模式; 天线相位中心偏差; 相位缠绕; 精密单点定位

本文引用格式

叶世榕 , 夏凤雨 , 赵乐文 , 夏朋飞 , 陈德忠 . 偏航姿态对北斗精密单点定位的影响分析[J]. 测绘学报, 2017 , 46(8) : 971 -977 . DOI: 10.11947/j.AGCS.2017.20170094

Abstract

When the elevation of the Sun with respect to orbital plane is small, the BDS satellite will not track the position of sun and thus will lead to abnormal attitude changing. To avoid this phenomenon, the satellite attitude keeps in orbit-normal mode during the period. The nominal attitude correction methods will affect the calculation of antenna phase center offset and phase wind-up in orbit-normal seasons, and furthermore lead to biases to the position and zenith tropospheric delay(ZTD) estimatedby precise point positioning (PPP). The results of the experiments undergone show that the comprehensive phase wind-up and the satellite antenna phase center errors caused by the incorrect BDS satellite orbit model will exceed 15cm. Compared to the nominal attitude mode,when the orbit-normal attitude mode is adopted, the positioning accuracy in the north, east and up directions will be improved by 53.2%, 54.2%, and 39.3% for dynamic PPP, 61.0%,72.3%,58.4% for static PPP, respectively. Furthermore, the accuracy of ZTD estimated by static PPP will be improved by 33.0%.

Key words： orbit-normal; antenna phase center offset; phase wind-up; PPP

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