有高程数据库支持的弹道预警信息生成方法  

The Generation of Trajectory Early Warning Information with Elevation Database

作　　者：杨冬 徐劲[1,2] 杜建丽[1,2] YANG Dong;XU Jin;DU Jian-li(Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023;Key Laboratory of Space Object and Debris Observation,Chinese Academy of Sciences,Nanjing 210023)

机构地区：[1]中国科学院紫金山天文台,南京210023 [2]中国科学院空间目标与碎片观测重点实验室,南京210023

出　　处：《天文学报》2023年第5期79-87,共9页Acta Astronomica Sinica

摘　　要：在基于目标轨道运动特征的预警信息推算中,引入高程信息库的支持,使对地球的假设从参考椭球体变为更真实的形态,并探讨在此情况下提高发、落点位置和时刻的预报精度的方法.采用数字高程模型进行的数值实验结果表明,在原方法的基础上增加少量高程迭代计算的情况下即可提高预报精度,发、落点位置高程越高的地区精度提高越明显.This paper proposes a new method of deriving the launch and landing locations based on the orbital motion characteristics of the missiles and elevation database.In this method,the DEM support is introduced to change the assumption of the earth from the reference ellipsoid to a more real shape.The method to improve the prediction accuracy of the position and time of the launch and landing points is discussed.The results with DEM(Digital Elevation Model)indicate the accuracy can be improved by adding a few elevation iterations on the original method.The higher the elevation of the starting and landing points,the better the result would be.

关 键 词：弹道 方法:数值 高度 

分 类 号：P135[天文地球—天体力学]