北斗三号地心运动反演方法与结果

doi:10.11947/j.AGCS.2023.20220518

测绘学报 ›› 2023, Vol. 52 ›› Issue (12): 2054-2065.doi: 10.11947/j.AGCS.2023.20220518

北斗三号地心运动反演方法与结果

郭仕伟^1,2, 施闯^1,2, 范磊², 魏娜³, 张涛¹, 方欣颀¹, 周凌昊¹

1. 北京航空航天大学电子信息工程学院, 北京 100191;
2. 北京航空航天大学前沿科学技术创新研究院, 北京 100191;
3. 武汉大学卫星导航定位技术研究中心, 湖北武汉 430079

收稿日期:2022-08-31 修回日期:2023-02-23 发布日期:2024-01-03
通讯作者: 范磊 E-mail:bhflei@buaa.edu.cn
作者简介:郭仕伟(1991-),男,博士,助理研究员,主要研究方向为地球参考框架。E-mail:guosw@buaa.edu.cn
基金资助:
国家自然科学基金(41931075;42174028;42274041);北京航空航天大学博士研究生卓越学术基金

Estimation and analysis of geocenter motion using BDS-3 data

GUO Shiwei^1,2, SHI Chuang^1,2, FAN Lei², WEI Na³, ZHANG Tao¹, FANG Xinqi¹, ZHOU Linghao¹

1. School of Electronic and Information Engineering, Beihang University, Beijing 100191, China;
2. Research Institute for Frontier Science, Beihang University, Beijing 100191, China;
3. GNSS Research Center, Wuhan University, Wuhan 430079, China

Received:2022-08-31 Revised:2023-02-23 Published:2024-01-03
Supported by:
The National Natural Science Foundation of China (Nos. 41931075;42174028;42274041);The Academic Excellence Foundation of BUAA for PhD Students

摘要/Abstract

摘要： 精确测定地心运动是建立毫米级地心参考框架的前提。随着北斗三号全球系统(BDS-3)的建成运行及BDS-3全球跟踪站的不断完善,研究利用BDS-3估计高精度的地心运动,对建立我国独立自主的参考框架具有重要的科学价值。本文利用BDS-3全球观测数据反演地心运动,分析了BDS-3地心运动中的周期性信号及其与轨道参数之间的相关性。结果表明,BDS-3地心运动与IGS组合产品在X和Y方向具有较好的一致性,差异小于7 mm,Z方向差异较大约21.6 mm。BDS-3地心运动X、Y和Z方向估计误差分别为2.7、2.8和5.3 mm。在地心运动X和Y方向发现与BDS-3卫星轨道重复周期有关的7 d信号,振幅约3 mm;Z方向存在显著的交点年信号的奇数谐波。Z方向估计误差的量级与BDS-3卫星空间构型有关,主要变化周期为1/2、1/4和1/6交点年。当3个轨道面太阳高度角的绝对值差异较小时,地心运动Z方向和轨道参数之间的相关性显著增大,最高可达0.8。

关键词: 地心运动, BDS-3, 最小约束, 交点年信号, 7天信号

Abstract: Accurate estimating of geocenter motion is an essential prerequisite for the establishment of geocenter-based terrestrial reference frame at millimeter level. With the commissioning of BDS-3 system and the increasing of BDS-3 tracking stations, determining geocenter motion by BDS-3 is of great scientific value to building the independent terrestrial reference frame of China. This paper determines geocenter motion based on the BDS-3 observations, investigating the spurious periodic signals in geocenter motion time series and the correlation between geocenter motion and orbital parameters. The results indicate that the discrepancy of geocenter motion between BDS-3 estimates and IGS combinations is at the level of 7 mm for the X and Y components, and is about 21.6 mm for the Z component. The formal errors of geocenter motion parameters are 2.7, 2.8 and 5.3 mm for the X, Y and Z components, respectively. An evident 7 d signal with the amplitude of about 3 mm is detected over the geocenter X and Y components, which is related to the BDS-3 orbit repeat time. Anomalous odd harmoncis of BDS draconitic year are found in the geocenter Z component. Besides, the magnitude of formal errors of the geocenter Z component is closely related to the geometry of satellite orbit planes, showing the variability with periods at 1/2, 1/4 and 1/6 of the draconitic year. When the absolute values of the Sun elevation angle of all the orbital planes are close, the correlation between the geocenter Z component and orbit parameters gets obviously increased, reaching up to 0.8.

Key words: geocenter motion, BDS-3, minimum constraint, draconitic signal, 7 d signal

中图分类号:

P227

郭仕伟, 施闯, 范磊, 魏娜, 张涛, 方欣颀, 周凌昊. 北斗三号地心运动反演方法与结果[J]. 测绘学报, 2023, 52(12): 2054-2065.

GUO Shiwei, SHI Chuang, FAN Lei, WEI Na, ZHANG Tao, FANG Xinqi, ZHOU Linghao. Estimation and analysis of geocenter motion using BDS-3 data[J]. Acta Geodaetica et Cartographica Sinica, 2023, 52(12): 2054-2065.

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北斗三号地心运动反演方法与结果

Estimation and analysis of geocenter motion using BDS-3 data

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