中国大陆连续GPS时间序列垂向周期信号空间分布  

Spatial Distribution of Vertical Periodic Signals in Continents GPS Time Series in Chinese Mainland

作　　者：苗培钰 肖根如[1,2] 郭增 杨佳敏 MIAO Peiyu;XIAO Genru;GUO Zeng;YANG Jiamin(Faculty of Geomatics,East China University of Technology,418 Guanglan Road,Nanchang 330013,China;Nanjing Zhixing Map Information Technology Co Ltd,699 Xuanwu Road,Nanjing 210023,China)

机构地区：[1]东华理工大学测绘工程学院,南昌市330013 [2]南京智绘星图信息科技有限公司,南京市210023

出　　处：《大地测量与地球动力学》2023年第4期356-363,共8页Journal of Geodesy and Geodynamics

基　　金：东华理工大学研究生创新基金(YC2022-s602);自然资源部海洋环境探测技术与应用重点实验室开放基金(MESTA-2020-A002);江西省重点研发计划(20212BBE53031)。

摘　　要：利用中国大陆构造环境监测网络连续GPS基准站数据,揭示垂向周期振幅及相位的空间分布特征。结果表明,各站垂向周期信号表现出明显的季节变化,半年周期信号的平均振幅只有年周期信号的1/4,二者呈现出不同的空间分布。年周期信号的振幅在空间上自西向东逐渐递减,东南沿海地区振幅较小,川滇地区年周期振幅较大;半年周期振幅自西南向东北逐渐减小,华北地区和川滇地区的半年周期现象较为明显。年周期与半年周期信号的相位有较大差异,年周期信号的峰值出现在2月到8月之间,半年周期信号峰值大多出现在1月和5月,并且有明显的分区特征。年周期信号峰值出现的时间会随纬度的增大逐渐变晚,同纬度下沿海地区的年周期信号峰值出现月份晚于内陆;半年周期信号峰值在西南、东北、华北地区多出现在5月,在华南、华中、西北北部地区多出现在1月。The continuous GPS reference station data of the Chinese Continental Tectonic Environment Monitoring Network are used to reveal the spatial distribution characteristics of the amplitude and phase of the vertical period.The results show that the vertical period signal of each station exhibits obvious seasonal variations,the average amplitude of the semi-annual period signal is only 1/4 of that of the annual period signal,and shows different spatial distributions.The amplitude of the annual cycle signal gradually decreases from west to east in space,with smaller amplitude in southeast coastal areas and larger amplitude in Sichuan and Yunnan;the amplitude of the semiannual cycle gradually decreases from southwest to northeast,and the semiannual cycle phenomenon is more obvious in north China and Sichuan and Yunnan.There is a big difference between phases of annual cycle and semi-annual cycle signals;the peak of annual cycle signal appears between February and August,and the peak of semi-annual cycle signal mostly appears in January and May,and there are obvious zoning characteristics.The peak of the annual cycle signal gradually appears later with increasing latitude,and the peak of the annual cycle signal appears later in coastal areas than inland at the same latitude;the peak of the semi-annual cycle signal appears mostly in May in southwest,northeast,and north China,and in January in south,central and northwest China.

关 键 词：GPS时间序列 PPP 最小二乘法 小波分析 克里金插值 空间分布 

分 类 号：P228[天文地球—大地测量学与测量工程]