| 大范围点质量模型快速构建方法研究 |
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| 引用本文： | 黄佳喜,王庆宾,张超,冯进凯.大范围点质量模型快速构建方法研究[J].大地测量与地球动力学,2017,37(1):11-15. |
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| 作者姓名： | 黄佳喜 王庆宾 张超 冯进凯 |
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| 摘 要： | 针对大范围点质量模型构建中遇到的大型线性方程解算的难题，提出基于窗口控制的残差点质量模型构建方法。将点质量模型由原来的稠密线性方程转化为稀疏线性方程，并在普通计算机上完成112 896阶稀疏线性方程的求解。以空中扰动引力计算为例，与传统的点质量模型和位系数模型的计算结果进行比较。结果表明，该方法能够在保证计算精度的同时有效扩大解算范围，提高解算效率。
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| 关 键 词： | 点质量模型 窗口半径 稀疏矩阵 行压缩存储 扰动引力 |
Research on Fast Construction Method of Large Scale Point Mass Model |
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| HUANG Jiaxi,WANG Qingbin,ZHANG Chao,FENG Jinkai.Research on Fast Construction Method of Large Scale Point Mass Model[J].Journal of Geodesy and Geodynamics,2017,37(1):11-15. |
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| Authors: | HUANG Jiaxi WANG Qingbin ZHANG Chao FENG Jinkai |
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| Abstract: | Point mass model is widely used in physical geodesy, but several challenges are faced in achieving high performance when solving linear equations. This paper presents a stratified residual point mass model based on window control, which converts the dense linear equation into sparse format. An 112 896-order sparse linear equation is solved on an ordinary computer. In order to illustrate the practicability of window control method, an experiment is carried out to calculate disturbing gravity at various altitudes. The performance results demonstrate that window control method achieves better precision and efficiency compared with traditional methods and is very well suited for large scale point mass construction. |
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| Keywords: | point mass model window control sparse matrix compressed sparse row(CSR) disturbing gravity |
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