摘要
地磁导航需要获得目标区域的地磁基准图。研究了基于国际地磁参考场的地磁场要素计算和等值线绘制方法。以给定目标区域的经纬高为输入,计算高阶地磁球谐函数获取地磁矢量并计算地磁场要素,修正了因地球扁率带来的数据差异。采用具有虚节点的移动矩形网格算法来绘制地磁参数等值线,生成目标区域的地磁基准图。采用C#实现了地磁基准图软件,测试表明,获得的地磁等高线数据满足使用要求,等值线精度较高。
It is necessary to obtain a geomagnetic reference map of the target area to perform geomagnetic navigation. Based on the international geomagnetic reference field(IGRF), this paper studied the methods to calculate the geomagnetic elements and draw the geomagnetic elements contour maps. The geomagnetic data is obtained for given geographical parameters by solving the IGRF. Then use this data to draw the geomagnetic elements contour map by using the method of moving quadrilateral within virtual nodes. The program is prepared by C# and the experimental results show that this program can calculate at any given point and draw its contour map.
作者
陈贵芳
郁丰
王润
CHEN Guifang;YU Feng;WANG Run(Key Laboratory of Space Photoelectric Detection and Perception of Ministry of Industry and Information Technology,Nanjing 210016,China;Academy of Astronautics,Nanjing University of Aeronautics and Astronautics,Jiangsu Province 210016,China)
出处
《地震地磁观测与研究》
2020年第3期98-104,共7页
Seismological and Geomagnetic Observation and Research
基金
国家自然科学基金(项目编号:61673212)。
关键词
地磁导航
IGRF
地磁场
等值线
虚节点
geomagnetic navigation
IGRF
geomagnetic field
contour map
virtual nodes
