基于改进椭球模型的航线算法  

Studyon the Route Calculating Method Based on Improved Ellipsoid Model

作　　者：李方能[1] 李厚朴[1] 吴延坤 

机构地区：[1]海军工程大学导航工程系,武汉430033 [2]中石化地球物理公司中原分公司,濮阳257001

出　　处：《舰船电子工程》2014年第7期81-85,共5页Ship Electronic Engineering

基　　金：国家自然科学基金(编号:41201478;41374018)资助

摘　　要：为提高飞机航迹计算的准确度,建立了考虑飞行高度的改进椭球模型,利用该椭球的对称性,采用空间向量分析方法,导出了大椭圆航线初始航线角的直接计算式;指出并纠正了前人给出的航程计算式中存在的偏差,借助计算机代数系统Mathematica,得到了计算航程的严密公式;从而为机载区域导航计算机确定航线要素提供了理论基础。In order to improve the planes track precision,the improved ellipsoid model is constructed considering the flight height.Using its symmetry,the direct formula of the initial course is derived through spatial vector analyses.The mistake that exists in previous formula used to calculate the route distance is pointed out and corrected,and the rigorous formula is available with the help of computer algebra system Mathematica.These formulae derived in this paper can provide theoretical basis for the determination of the route elements by area navigation computers.

关 键 词：区域导航 飞行高度 改进椭球 大椭圆航线 

分 类 号：P226[天文地球—大地测量学与测量工程]