地影期间卫星姿态四元数产品对北斗精密单点定位的影响分析

doi:10.11947/j.AGCS.2023.20220245

测绘学报 ›› 2023, Vol. 52 ›› Issue (4): 550-558.doi: 10.11947/j.AGCS.2023.20220245

地影期间卫星姿态四元数产品对北斗精密单点定位的影响分析

刘天骏¹, 陈渠森¹, 姜卫平¹, 陈华^2,3, 夏凤雨¹, 范曹明⁴

1. 武汉大学卫星导航定位技术研究中心, 湖北武汉 430079;
2. 湖北珞珈实验室, 湖北武汉 430079;
3. 武汉大学测绘学院, 湖北武汉 430079;
4. 清华大学电子工程系, 北京 100084

收稿日期:2022-04-11 修回日期:2023-01-30 出版日期:2023-04-20 发布日期:2023-05-05
通讯作者: 姜卫平 E-mail:wpjiang@whu.edu.cn
作者简介:刘天骏(1994-),男,博士生,主要研究方向为精密卫星钟差、多频相位OSB估计和PPP定位。E-mail:viper_tjliu@whu.edu.cn
基金资助:
湖北省战略人才项目(2022EJD010);武汉市知识创新专项(2022010801010107);国家自然科学基金(42174030)

Effect of satellite attitude quaternions on BeiDou precise point positioning during the eclipse season

LIU Tianjun¹, CHEN Qusen¹, JIANG Weiping¹, CHEN Hua^2,3, XIA Fengyu¹, FAN Caoming⁴

1. GNSS Research Center, Wuhan University, Wuhan 430079, China;
2. Hubei Luojia Laboratory, Wuhan 430079, China;
3. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;
4. Department of Electronic Engineering, Tsinghua University, Beijing 100084, China

Received:2022-04-11 Revised:2023-01-30 Online:2023-04-20 Published:2023-05-05
Supported by:
Program for Hubei Provincial Science and Technology Innovation Talents (No. 2022EJD010);Special Fund for Wuhan Knowledge Innovation Program(No. 2022010801010107);The National Natural Science Foundation of China (No. 42174030)

摘要/Abstract

摘要： 与分析中心保持一致的卫星姿态模型是精密单点定位(PPP)获得高精度定位的关键因素。本文基于武汉大学分析中心(WUM)提供的卫星姿态四元数产品,详细阐述了利用卫星姿态四元数计算偏航角的方法。针对卫星在太阳高度角较低的情况,分析了WUM对BDS-2/BDS-3所采用的姿态模型策略,并基于开源定位软件GAMP深入研究了不同的卫星姿态模型策略对BDS-2/BDS-3 PPP定位的影响。研究表明,在深地影时期,不一致的姿态模型会导致偏航角出现360°的差异,进而使相位缠绕和卫星天线相位中心改正出现分米级的偏差。在此期间,使用卫星姿态四元数产品,与名义姿态相比PPP的定位精度在东、北和天顶方向能分别提高约32%、29%和38%;相较于剔除姿态异常卫星策略(剔除远日点和近日点的卫星),PPP的定位精度在3个方向分别能提高约29%、25%和28%。因此,PPP用户应采用各分析中心提供的卫星姿态四元数产品进行天线相位中心改正(PCO)和相位缠绕改正,避免使用不一致的姿态模型导致PPP定位结果的可靠性降低。

关键词: 卫星姿态四元数, 卫星姿态, 精密单点定位, 天线相位中心改正, 相位缠绕

Abstract: In order to obtain high-precision positioning, precise point positioning (PPP) user side should keep the the consistent satellite attitude model with analysis centers. Based on the satellite attitude quaternions products provided by the Wuhan university analysis centers (WUM), we introduce the yaw angle computation method that uses satellite attitude quaternions. When the BDS-2/BDS-3 satellite is at a low sun elevation angle, the satellite attitude model strategy of WUM is analyzed. By using the open-source positioning software GAMP, the BDS-2/BDS-3 PPP solutions are also investigated with different satellite attitude strategies. During the deep eclipse season, the results demonstrate that the differences between nominal and quaternion yaw angles can reach 360°, which can cause the decimeter-level biases in the phase wind-up and antenna phase center offset correction. In this period, compared with the nominal attitude, the positioning accuracy of PPP solutions with satellite attitude quaternions can be improved approximately 32%, 29% and 38% in the earth (E), north (N) and up (U) components, respectively. Furthermore, the positioning accuracy of PPP solutions with satellite attitude quaternions can be improved approximately 29%,25% and 28%in the E, N and U components, respectively, when compared to that of the deleting the eclipsing satellite strategy(deleting satellite at the farthest and closest point of the orbit). The inconsistent attitude models would reduce the reliability of PPP positioning results, so the satellite attitude quaternions that provided from the analysis centers should be used for phase wind-up and antenna phase center offset correction in the PPP user side.

Key words: satellite attitude quaternions, satellite attitude, precise point positioning, antenna phase center offset, wind-up

中图分类号:

P227

刘天骏, 陈渠森, 姜卫平, 陈华, 夏凤雨, 范曹明. 地影期间卫星姿态四元数产品对北斗精密单点定位的影响分析[J]. 测绘学报, 2023, 52(4): 550-558.

LIU Tianjun, CHEN Qusen, JIANG Weiping, CHEN Hua, XIA Fengyu, FAN Caoming. Effect of satellite attitude quaternions on BeiDou precise point positioning during the eclipse season[J]. Acta Geodaetica et Cartographica Sinica, 2023, 52(4): 550-558.

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地影期间卫星姿态四元数产品对北斗精密单点定位的影响分析

Effect of satellite attitude quaternions on BeiDou precise point positioning during the eclipse season

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