摘要
利用GAMIT/GLOBK 10.7获取欧洲约70个GPS站2011—2016年的高精度坐标时间序列。利用奇异谱分析(SSA)和最小二乘拟合相结合进行站速度估计,并将估计结果与最小二乘谱分析估计值及SONEL站速度对比,在此基础上对欧洲地壳运动规律进行分析。结果显示:站速度估计的中误差平均值均小于0.45 mm/yr,优于常规最小二乘谱分析估计精度,说明在一定程度上避免了周期和噪声项的影响;与SONEL站速度平均差值小于0.6 mm/yr,外附精度较好;水平方向,欧洲大部分地区以约20 mm/yr的速度向西北方向运动;垂直方向,北纬45°以南的欧洲地区呈下沉的趋势,且大部分区域运动速度小于5 mm/yr,北纬45°以北则呈上升趋势,且上升速度随纬度的增高而增大,靠近北极圈的部分地区的上升速度达20 mm/yr。
High-precision coordinate time series of about 70 global positioning system(GPS)stations in Europe from 2011 to 2016 was first obtained by using GAMIT/GLOBK10.7.The station velocity was then estimated by using singular spectrum analysis(SSA)and least square fitting.The estimated results were compared with the estimated value of least square spectrum analysis and the station velocity published by SONEL.On this basis,the law of European crustal movement was finally analyzed.The results show that the average value of mean square error in velocity estimation is less than 0.45 mm/yr,which is better than conventional least square spectral analysis,indicating that the method can avoid the influence of period and noise term to a certain extent.The mean difference of the station velocity from that published by SONEL is below 0.6 mm/yr,and the consistence is good.In horizontal direction,most of the European stations are moving northwest at a speed of about 20 mm/yr.In the vertical direction,the European stations south of 45°N latitude presents a downward movement trend and the movement velocity is largely below 5 mm/yr.However,the movement of European stations north of 45°N latitude presents largely an upward trend and the rising velocity increases with the increase of the latitude.The rising velocity of some regions near the Arctic Circle reaches 20 mm/yr.
作者
李国伟
周茂盛
LI Guowei;ZHOU Maosheng(Shandong Provincial Institute of Land Surveying and Mapping, Jinan, Shandong 250102, China;College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao, Shandong 266590, China)
出处
《山东科技大学学报（自然科学版）》
CAS
北大核心
2021年第6期11-19,共9页
Journal of Shandong University of Science and Technology(Natural Science)
基金
国家自然科学基金项目(41774001)
国家测绘自主可控专项项目(816-517)。
