大偏心率火星探测器轨道外推的近似方法

An Approximation Method of Orbit Prediction for HEO Mars Probes

对于快自转天体,如地球和火星,由于其非球形引力位中田谐项的振动频率与卫星运动频率相当,会给构造大偏心率环绕型探测器轨道分析解带来无法克服的困难。本文以轨道偏心率e≈0.9的＂萤火虫一号＂（YH-1）火星环绕探测器为例,探讨在精度要求不高的情况下,给出近似分析解和计算效率与其相当的数值解计算方案,以满足在计算资源有限的制约下快速轨道外推的要求。

For fast-rotation celestial bodies like the earth and Mars,the motion frequency between the Tesseral Harmonic Gravitational Potential and the satellite is comparative.This brings about enormous difficulty to construction of a perturbation analytical solution for high eccentricity orbit satellites.Taking YH-1 Mars Orbiter Probe,the eccentricity of which is as high as 0.9,as an example,this paper puts forward an approximation analytical solution and a comparative computation-efficiency numerical computational scheme to meet the demand of fast orbit prediction under the constraint of limited computing resources.