| 基于垂直剖面函数的天顶对流层延迟插值算法 |
| |
| 引用本文： | 徐 康,邓兴升.基于垂直剖面函数的天顶对流层延迟插值算法[J].大地测量与地球动力学,2020,40(1):66-70. |
| |
| 作者姓名： | 徐 康 邓兴升 |
| |
| 作者单位： | 长沙理工大学交通运输工程学院 |
| |
| 基金项目： | 湖南省教育厅科研项目(17B004)~~ |
| |
| 摘 要： | 通过分析由ERA-Interim气象再分析资料积分方法得到的天顶对流层总延迟随高程变化的规律,提出一种基于垂直剖面函数的天顶对流层延迟(ZTD)插值算法。该算法以ZTD的垂直分布规律为基础,通过垂直剖面函数实现ZTD在高程方向上的精准投影延拓,可以避免因高差较大造成的空间内插结构畸形。采用IGS站提供的高精度对流层产品进行实验验证表明,该算法相对于传统算法能够有效提高ZTD改正值的精度,尤其在高差超过1 km的情况下,相对于反距离加权法精度提升了96%,相对于空间回归法精度提升了79%。
|
| 关 键 词： | 天顶对流层延迟 ERA-INTERIM 插值 投影 延拓 |
A Zenith Tropospheric Delay Interpolation Algorithm Based on Vertical Profile Function |
| |
| XU Kang,DENG Xingsheng.A Zenith Tropospheric Delay Interpolation Algorithm Based on Vertical Profile Function[J].Journal of Geodesy and Geodynamics,2020,40(1):66-70. |
| |
| Authors: | XU Kang DENG Xingsheng |
| |
| Institution: | (School of Traffic and Transportation Engineering,Changsha University of Science and Technology,960 Second Segment of South-Wanjiali Road,Changsha 410114,China) |
| |
| Abstract: | In this paper, we propose a zenith tropospheric delay interpolation algorithm based on vertical profile function by analyzing the law of zenith tropospheric total delay (ZTD) with elevation variation derived from ERA-Interim reanalysis data. Based on the vertical distribution law of ZTD, this method can realize accurate projection and extension of tropospheric delay on the elevation direction by vertical profile function. Compared with the traditional interpolation algorithm, the spatial structure malformation caused by the large elevation differences can be avoided. An experiment is performed with the tropospheric delay products of IGS, and the results show that the proposed algorithm can effectively improve the accuracy of ZTD correction value compared with the traditional algorithm. Especially in the case of elevation difference over 1 km, compared with the inverse distance weighting method, the accuracy is improved by 96%, which is 79% higher than the spatial regression method. |
| |
| Keywords: | zenith tropospheric delay(ZTD) ERA-Interim interpolation projection extension |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《大地测量与地球动力学》浏览原始摘要信息 |
| 点击此处可从《大地测量与地球动力学》下载免费的PDF全文 |
|
