摘要
为了更精确地考虑地球对超远程弹道计算的影响,提出了一个计入精确正常重力的椭球地表弹道模型。讨论了在椭球地表情况下火箭落点以及飞行高度的计算方法,推导出精确正常重力的计算公式,得到了椭球地表弹道模型,最后计算和分析了采用平面地表模型所产生的射程误差。分析结果表明:对于射程较大的远程弹道,与使用平面地表弹道模型相比,采用该文的椭球地表弹道模型的误差较小。
To consider the effect of the earth on the calculation of ultra range trajectory more accurately, an elliptic earth trajectory model adopting accurate normal gravity is established. The calculation method for the rocket impact point and flight height is discussed. An accurate normal gravity calculation method is deducted and an elliptic earth trajectory model is obtained. The error of range calculation by adopting a plain earth model is calculated and analyzed. The result shows that, in terms of the long range trajectory, the range calculation error caused by the ellipsoid earth surface trajectory model is smaller than that by the plain earth surface trajectory model.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2009年第5期607-611,共5页
Journal of Nanjing University of Science and Technology
关键词
正常重力
正常地球椭球
弹道
球谐函数
射程
normal gravity
normal earth ellipsoid
trajectory
spherical harmonious functions
ranges
