摘要
从利用两点经纬度坐标求其距离和使用已知的距离位置关系反推某点经纬度坐标两个方面,对比正球体两点距算法,推导了椭球体两点距算法。通过计算椭球扁率,将经纬度坐标转换为直角坐标,结合高度因素进行计算可以得到更精确的结果。通过数据误差分析和与地图查询数据的对比,对算法的精度和适用范围进行了分析。对于精确制导武器,采用椭球体两点距算法能够得到更高精度的结果,具有重要意义。
It is discussed how to get the distance by using geodetic coordinates of two points, or the geographic coordinates of one point by using the position of another point and the distance between two points. Comparing the spheric distance algorithm, a spheroidal distance coordinates is deduced. By using oblateness of the Earth, and transforming the geodetic coordinates of two points into rectangular coordinates, the exact distance between them is gotten, the precision and the scope of the algorithms are analyzed by calculating and comparing with the results from the map-information.
出处
《航空兵器》
2008年第3期7-12,共6页
Aero Weaponry
关键词
经纬度坐标
最短距离
正球体两点距算法
椭球体两点距算法
武器投放
geographic coordinate
shortest distance
spheric distance algorithm
spheroidal distance algorithm
weapon release
