NSSC OpenIR  > 空间技术部
Alternative TitleSimplified Calculation Method of Geomagnetic Field Model
张涛; 高东; 郑建华
Source Publication空间科学学报
Keyword地磁场强度估计函数 多项式拟合 伪地心 地磁导航
Abstract为了实现地磁导航在近地轨道卫星上的应用,需要解决传统的高斯球谐函数递推法在计算地磁场强度时存在方法复杂、计算量大、实时性难以保证等问题.针对上述问题,提出一种用地球磁场估计函数代替球谐函数的地磁场强度计算方法.该方法利用伪地心下的磁偶极子模型代替主磁场模型,通过多项式拟合离线得到高度范围内固定经纬度网格点的伪中心距系数,进而利用插值法和偶极子模型得到任意点的地磁场强度.仿真结果表明,轨道高度为300~500 km,经纬度网格间隔为0.5°时,地球磁场估计函数法的导航精度与地球主磁场模型WMM精度一致的同时,降低了计算负担,提高了算法计算效率.
Other AbstractTo realize the application of geomagnetic navigation on the low orbit satellite, the complexity, enormous calculation, poor real time ability of traditional Gaussian spherical harmonica function should be solved before being used to calculate the geomagnetic vector. A geomagnetic field approximation function, Geomagnetic Field Approximation Functions (GFAF),is proposed to replace the spherical harmonic function. Dipole model under a pseudo-centers is utilized to replace the main geomagnetic model in GFAF method. And the coefficient of pseudo-center of different latitude-longitude grid is obtained by polynomial fit method. Finally, the geomagnetic field vector of any position can be achieved using different interpolation algorithm. A simulation test is carried out under the condition that the increment of latitude and longitude is 0.5° and the orbital height is from 300 to 500 km. The results show that the navigation accuracy of GFAF method is the same to that of geomagnetic field model. However, GFAF method effectively decreases the cost of computing and and improves the calculation efficiency.
Indexed ByCSCD
Citation statistics
Document Type期刊论文
Recommended Citation
GB/T 7714
张涛,高东,郑建华. 地磁场模型简化计算方法[J]. 空间科学学报,2018,38(1):88-93.
APA 张涛,高东,&郑建华.(2018).地磁场模型简化计算方法.空间科学学报,38(1),88-93.
MLA 张涛,et al."地磁场模型简化计算方法".空间科学学报 38.1(2018):88-93.
Files in This Item: Download All
File Name/Size DocType Version Access License
201838188-93.pdf(1338KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[张涛]'s Articles
[高东]'s Articles
[郑建华]'s Articles
Baidu academic
Similar articles in Baidu academic
[张涛]'s Articles
[高东]'s Articles
[郑建华]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[张涛]'s Articles
[高东]'s Articles
[郑建华]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 201838188-93.pdf
Format: Adobe PDF
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.