基于台州及周边地区CORS站网地表形变时空特征分析

Movement trend and time series analysis of CORS station in Taizhou area

基于台州地区15个连续运行参考站(CORS)2017-2019年的时间序列,对其进行线性拟合,构造三维速度场,并利用功率谱分析及小波变换分析其CORS站周期特征.发现台州地区CORS中基准站水平方向具有平均站速度33.58 mm/a,运动方向为东南的水平运动现象,高程方向最大抬升速率3 mm/a,最大沉降速率1 mm/a;从周期上看,CORS站垂直方向相较于水平方向明显很多,具有明显的年周期、半年周期以及季节周期.

Based on the 2017-2019 time series of 15 CORS stations in Taizhou area,linear fitting is carried out to construct three-dimensional velocity field,and the periodic characteristics of CORS stations are analyzed by power spectrum analysis and wavelet transform.It is found that in Taizhou CORS,the average station speed in the horizontal direction is 33.58 mm/a,with movement driection to the southeast,while the maximum lifting rate in the vertical direction is 3 mm/a,and the maximum settlement rate is 1 mm/a.From the perspective of cycle,the vertical direction of CORS station is much more obvious than that in the horizontal direction,with obvious annual cycle,half year cycle and seasonal cycle.