基于GNSS全球解的地心运动反演方法  

Geocentric motion inversion method based on GNSS global solution

作　　者：赵有兵[1] 万廷聪 李军成 邱春洪 ZHAO Youbing;WAN Tingcong;LI Juncheng;QIU Chunhong(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu,Sichuan 610031,China;Lunan High Speed Railway Co.,Ltd.,Jinan,Shandong 250102,China)

机构地区：[1]中铁二院工程集团有限责任公司,四川成都610031 [2]鲁南高速铁路有限公司,山东济南250102

出　　处：《测绘标准化》2023年第1期45-49,共5页Standardization of Surveying and Mapping

摘　　要：地心运动研究是实现毫米级坐标框架的重要内容。本文使用IGS服务重新处理后的、时间跨度为1995—2015年的周解数据,采用网平移法,利用HELMERT模型计算全球GNSS网络自由网解相对于ITRF成果的质心三维偏差时间序列,同时采用时间序列模型对地心运动3个方向的周年项特征(振幅和相位)进行了统计,并与SLR地心反演数据进行对比。结果表明,采用本文方法获取的基于IG2全球解的地心运动时间序列,在X、Y、Z 3个方向都含有周年项,其中Z方向周期运动更为显著;采用GNSS数据反演地心运动结果与SLR成果的总体特征一致性较好。The research of geocentric motion is an important part of the realization of the millimeter coordinate frame.In this paper,the IGS service is used to re process the weekly solution data from 1995 to 2015,the net translation method and the HELMERT model are used to calculate the time series of three dimensional deviation of the mass center of the GNSS free network solution relative to the ITRF results.The time series model is used to calculate the annual term characteristics of geocentric motion in three directions,and compared with SLR geocentric inversion data.The results show that the time series of geocentric motion based on the global solution of IG2 obtained by this method contains annual terms in X,Y and Z directions,the periodic motion in Z direction is more significant,and the GNSS data inversion results of geocentric motion are in good agreement with SLR data.

关 键 词：地心运动 网平移法 赫尔默特模型 国际地球参考框架 国际GNSS服务 

分 类 号：P228.42[天文地球—大地测量学与测量工程]