我国高纬高寒地区省级CORS站时间序列分析  

Time series analysis of provincial CORS stations in high latitude and severely cold region in China

作　　者：徐琦 祝会忠[1,2] 关沧海 肖青怀 赵忠海 XU Qi;ZHU Huizhong;GUAN Canghai;XIAO Qinghuai;ZHAO Zhonghai(School of Geomatics,Liaoning Technical University,Fuxin,Liaoning 123000,China;Beijing Fangshan Satellite Laser Ranging National Observation and Research Station,Chinese Academy of Surveying and Mapping,Beijing 102488,China;The Second Geodetic Surveying Brigade of Ministry of Natural Resources,Ha’erbin 150025,China;Chinese Academy of Surveying and Mapping,Beijing 100036,China)

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000 [2]中国测绘科学研究院北京房山人卫激光国家野外科学观测研究站,北京102488 [3]自然资源部第二大地测量队,哈尔滨150025 [4]中国测绘科学研究院,北京100036

出　　处：《测绘科学》2022年第3期50-57,84,共9页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(42074012,42030109);辽宁省重点研发计划项目(2020JH2/10100044);国家重点研发计划项目(2016YFC0803102);北斗地基增强导航定位与HLJCORS融合服务研究项目(GA17A301)。

摘　　要：针对目前在分析高纬高寒地区连续运行基准站(CORS)坐标时间序列变化趋势不充分的现状,该文采用GAMIT/GLOBK软件,联合周边10个IGS站,处理了17座黑龙江省CORS(HLJCORS)基准站2017—2019共3a的观测数据,获取了各基准站在ITRF2014框架下的坐标时间序列;对坐标序列进行小波多分辨率分析,发现各土层基准站周年项振幅会随着温度的降低而变大,振幅波动与温度变化有较好的一致性,阐明了高寒地区特有的冻胀物理现象对基准站周年项运动的影响;采用最小二乘线性拟合得到各基准站运动速度,并通过固定1个参考站得到各基准站间最大相对站速度,基于此给出了HLJCORS基准站框架坐标更新周期的建议。该研究拓展了基于CORS站时间序列分析的应用研究领域,可为省级参考框架的维护提供参考。According to the current situation that the analysis of the change trend of the coordinate time series of continuously operating reference stations(CORS)in high latitude and cold region was insufficient,GAMIT/GLOBK software was used to process the observation data of 17CORS(HLJCORS)in Heilongjiang Province for 3 years from 2017to 2019,the coordinate time series of each station under the framework of ITRF2014were obtained;Based on wavelet multiresolution analysis of coordinate series,it was founded that the annual amplitude of each soil reference station increased with the decrease of temperature,and the fluctuation of amplitude was in good agreement with the change of temperature,the influence of frost heaving on the annual motion of reference station in high cold region was clarified;The velocities of each reference stations were obtained by least square linear fitting,by fixing one reference station,the maximum relative station velocity between each reference station was obtained,based on this,the suggestion of the frame coordinate update cycle of the HLJCORS reference station was given.The research results could expand the application research field of time series analysis based on CORS stations and provided reference for the maintenance of the provincial reference frame.

关 键 词：高纬度高寒地区 连续运行基准站 时间序列 小波多分辨率分析 冻胀 参考框架 

分 类 号：P228[天文地球—大地测量学与测量工程]