GNSS基准站三维坐标时间序列周期特征分析  

Analysis of the periodic characteristics of 3D coordinate timeseries of the GNSS reference station

作　　者：赖山东 朱雪辉 LAI Shandong;ZHU Xuehui(Jiangxi Institute of Natural Resources Surveying,Mapping and monitoring,Nanchang,Jiangxi 330009,China)

机构地区：[1]江西省自然资源测绘与监测院,江西南昌330009

出　　处：《测绘标准化》2023年第1期39-44,共6页Standardization of Surveying and Mapping

摘　　要：GNSS基准站坐标时间序列作为构建参考框架的基础数据,对其非线性变化特征进行研究对于构建合理的测站运动模型很重要。本文基于中国内地构造环境监测网络1999—2022年的GNSS观测成果,利用功率谱分析和最小二乘估计方法,研究GNSS基准站三维坐标时间序列的周期变化特征。对23年的数据分析的结果表明,陆态网GNSS基准站3个方向均存在以周年和半周年信号为主要特征的季节性变化信号,且周年信号特征显著强于半周年信号特征,高程方向的周期性变化比水平方向更明显;3个坐标分量加权均方根误差的平均值分别为3.3 mm、3.5 mm、8.5 mm;不同基准站之间的周期振幅和相位也存在差异,U、N、E 3个方向上的周年振幅平均值分别为4.6 mm、0.8 mm、0.8 mm,半周年振幅分别为1.6 mm、0.4 mm、0.3 mm;中国地区GNSS基准站的周期振幅和相位并没有表现出显著的一致性规律,反映出不同地区基准站所受到的非构造运动的影响存在差异。The study of the nonlinear variation characteristics of coordinate time series of the GNSS reference station,as the basic data for constructing the reference frame,is directly related to the construction of a reasonable motion model of the station.This paper based on the GNSS observation results of CMONOC from 1999 to 2022,the periodic variation characteristics of the 3D coordinate time series of the regional GNSS reference stations are studied by using power spectrum analysis and least squares estimation methods in this paper.The results of 23 years′data analysis show that there are seasonal variation signals with annual and semi annual signals as the main characteristics in all three directions of the GNSS reference stations of CMONOC,and the annual signal characteristics are significantly stronger than the semi annual characteristics,and the periodic variation in the vertical direction is more obvious than that in the horizontal direction.The mean values of the weighted root mean square errors in the three directions are 3.3 mm,3.5 mm and 8.5 mm,and respectively there are differences in the annual amplitudes and phases among different reference stations.The average period amplitude in U,N and E directions is 4.6 mm,0.8 mm and 0.8 mm,and the semi annual amplitude is 1.6 mm,0.4 mm and 0.3 mm.The period amplitudes and phases of GNSS reference stations in the whole China region do not show a significant consistent pattern,reflecting the differences in the influence of non tectonic motions on the reference stations in different regions.

关 键 词：时间序列 GNSS基准站 周期特征 功率谱分析 

分 类 号：P228.41[天文地球—大地测量学与测量工程]