基于径向基函数插值的极移参数预报研究  

Research on Polar Motion Parameter Prediction Based on Radial Basis Function Interpolation

作　　者：吴飞 王乐洋 曾志庆 戴毓锋 曹庆晨 WU Fei;WANG Leyang;ZENG Zhiqing;DAI Yufeng;CAO Qingchen(School of Surveying and Geoinformation Engineering,East China University of Technology,Nanchang 330013,China;Key Laboratory of Mine Environmental Monitoring and Improving around Poyang Lake,MNR,East China University of Technology,Nanchang 330013,China;School of Environment and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]东华理工大学测绘与空间信息工程学院,南昌市330013 [2]东华理工大学自然资源部环鄱阳湖区域矿山环境监测与治理重点实验室,南昌市330013 [3]中国矿业大学环境与测绘学院,江苏省徐州市221116

出　　处：《大地测量与地球动力学》2024年第7期690-692,共3页Journal of Geodesy and Geodynamics

基　　金：东华理工大学博士科研启动基金(DHBK2019181);江西省数字国土重点实验室开放基金(DLLJ202109)。

摘　　要：极移参数预报的基础数据通常采用国际地球自转和参考系服务组织发布的最终解产品,数据分辨率为1 d。利用径向基函数对极移观测值进行插值,获取6 h分辨率的极移产品,并基于LS+AR模型进行500组预报实验。结果表明,相较于未进行插值的预报结果,该方法在1~7 d超短期预报中极移X和Y方向预报精度分别平均提升22.4%和38.4%。The basic data for polar motion parameter prediction usually applies the final solution product published by the international earth rotation and reference systems service,which has a data resolution of 1 day.In this paper,we use the radial basis function to interpolate polar motion observations,and obtain polar motion products with a resolution of 6 hours.We test 500 sets of prediction experiments based on LS+AR model.The experimental results show that compared with the prediction results without interpolation,the prediction accuracy of proposed method in the polar motion X and Y directions improves by 22.4%and 38.4%in the ultra-short-term forecast of 1-7 days.

关 键 词：地球自转 极移 径向基函数 LS+AR 

分 类 号：P227[天文地球—大地测量学与测量工程]