摘要
利用全球大气模型和CORS位置时间序列数据,基于负荷形变理论,采用球谐系数法计算大气负荷变化对CORS位置地壳形变的影响。结果显示,对研究区CORS位置垂直方向影响为-15.9~13.2mm,水平形变影响为0~2.7mm。根据移除大气负荷对CORS影响前后序列的RMS值变化可知,移除大气负荷影响对CORS时间序列水平方向改善较小,垂直方向改善明显;根据最小二乘方法计算研究区大气负荷变化对地壳垂直方向的形变导纳值(回归系数)为-0.7^-0.43mm/hPa。本文研究方法和成果对分离修正CORS中大气负荷影响具有借鉴意义。
Based on the global atmospheric model and the time series data of CORS location,we calculate the influence of atmospheric load on the crustal deformation at CORS locations using the spherical harmonic coefficient method.The results show that the influence of atmospheric load on the vertical direction of CORS location in the study area is-15.9 to 13.2 mm,and the influence on horizontal deformation is 0 to 2.7 mm.According to the change of RMS value before and after removing the influence of atmospheric load on CORS,it is concluded that removing the influence of atmospheric load on the horizontal direction of CORS time series has little improvement,but has obvious improvement on the vertical direction.According to the least square method,the crustal vertical deformation admittance(regression coefficient)of the study area varies from-0.75 to-0.43 mm/hPa.The research methods and results of this paper can be used for reference in the separation and correction of atmospheric load in CORS.
作者
王海涛
聂建亮
田婕
王伟
郭鑫伟
靳鑫洋
邰贺
成夏葳
WANG Haitao;NIE Jianliang;TIAN Jie;WANG Wei;GUO Xinwei;JIN Xinyang;TAI He;CHENG Xiawei(Geodetic Data Processing Centre,MNR,334 East-Youyi Road,Xi’an 710054,China;Chinese Academy of Surveying and Mapping,28 West-Lianhuachi Road,Beijing 100830,China;Shenyang Research Institute of Surveying and Mapping,1 South-Sanhao Street,Shenyang 110004,China)
出处
《大地测量与地球动力学》
CSCD
北大核心
2019年第11期1159-1164,共6页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(41574003,41774004,41474015,41604001)
国家科技部科技基础性工作专项(2015FY210400)
国家基础测绘科技项目(2018KJ0205)
陕西测绘地理信息局科技创新项目(2018-4)~~
关键词
大气负荷
CORS
球谐系数法
垂直形变
atmospheric load
CORS
spherical harmonic coefficient method
vertical deformatio
