基于QOCA软件的GNSS连续站中非构造噪声剔除方法研究

Research on Noise Elimination Method in GNSS Continuous Station Based on QOCA Software

连续GNSS变形监测是地壳形变监测的主要方法,在连续站位移时间序列中存在着非地壳内部动力因素造成的非构造噪声。采用QOCA软件的analyze_tseri与pca模块对36个GNSS连续站位移时间序列进行分析处理,剔除连续站中的共模误差,获取了位移时间序列中的周期性参数信息,将其中的周期性等非构造噪声剔除,令GNSS连续站水平运动速度的精度提高了约0.3 mm/yr,垂直方向运动速度的精度提高了约0.6 mm/yr,得到相对真实的地壳形变信息,为地壳的形变研究提供了重要的基础数据。

Continuous GNSS deformation monitoring has become the main method of crustal deformation monitoring.There are non-structural noises caused by non-crustal dynamic factors in the displacement time series of continuous stations.The study uses analyze_tseri and pca modules of QOCA software to analyze and process the displacement time series of 36 GNSS continuous stations,eliminates the common mode errors in the continuous stations,obtains the periodic parameter information in the displacement time series,and eliminates the periodic and other non-structural noises in it.The accuracy of horizontal motion velocity and vertical motion velocity of GNSS continuous station is improved by about 0.3 mm/yr,the accuracy of vertical motion velocity is improved by about 0.6mm/yr,and relatively real crustal deformation information is obtained,which provides important basic data for the study of crustal deformation.