海潮模型对陆态网络GNSS观测的影响  

Influence of Ocean Tide Model on GNSS Observations of CMONOC

作　　者：何威威 王琪洁[1,2] 张化疑 王梦芮 肖凤仙 HE Weiwei;WANG Qijie;ZHANG Huayi;WANG Mengrui;XIAO Fengxian(School of Geosciences and Info-Physics,Central South University,932 South-Lushan Road,Changsha 410083,China;Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring,Ministry of Education,Central South University,932 South-Lushan Road,Changsha 410083,China;The First Institute of Oceanography,MNR,6 Xianxialing Road,Qingdao 266061,China)

机构地区：[1]中南大学地球科学与信息物理学院,长沙市410083 [2]中南大学有色金属成矿预测与地质环境监测教育部重点实验室,长沙市410083 [3]自然资源部第一海洋研究所,青岛市266061

出　　处：《大地测量与地球动力学》2023年第11期1193-1198,共6页Journal of Geodesy and Geodynamics

基　　金：湖南省教育厅科研项目(21A0006);长沙市自然科学基金(kq2208262)。

摘　　要：选取FES2004、NAO.99b、FES2014b、EOT20、GOT4.10c、TPXO9.5a海潮模型分别对253个陆态网络GNSS测站进行海潮负荷位移(ocean tide loading displacement, OTLD)改正,分析未模型化或模型不准确的OTLD对陆态网络GNSS高程时间序列和天顶对流层延迟(zenith tropospheric delay, ZTD)估计的影响。结果表明,OTLD影响越大,不同海潮模型改正对GNSS高程时间序列的w_(RMS)改善效果和差异越明显,改善效果最高可达52%以上,最大差异可达11%;海潮模型差异造成的GNSS最大混叠信号振幅约为4 mm,对应周期主要为14.8 d、365 d;OTLD与ZTD偏差存在准线性关系,使用的海潮模型实用性越好,两者线性关系越明显;FES2014b模型对GNSS高程时间序列的w_(RMS)、混叠周期、ZTD估计的OTLD改正效果均最优。We select the FES2004,NAO.99b,FES2014b,EOT20,GOT4.10c and TPXO9.5a ocean tide models for OTLD correction of 253 CMONOC GNSS stations,and analyze the influence of unmodeled or inaccurate OTLD on CMONOC GNSS coordinate time series and zenith troposphere delay(ZTD)estimation.The results show that the greater the influence of OTLD,the more obvious the improvement effect and difference of different tide model corrections on the w RMS of GNSS coordinate time series.The maximum improvement effect can be more than 52%,and the maximum difference can be up to 11%.The maximum amplitude of GNSS mixed signal caused by the difference of tide models is about 4 mm,and the corresponding periods are mainly 14.8 d and 365 d.There is a quasi-linear relationship between OTLD and ZTD deviation,and the better the practicability of tide model,the more obvious the linear relationship between them.FES2014b model has a better OTLD correction effect on the w RMS of GNSS coordinate time series,the mixed period,and the ZTD estimation.

关 键 词：海潮模型 陆态网络 GNSS 混叠信号 ZTD 

分 类 号：P228[天文地球—大地测量学与测量工程]