几种弹道扰动引力计算模型的分析与比较

ANALYSIS AND COMPARISON OF TRAJECTORY DISTURBING GRAVITY CALCULATED BY SEVERAL COMPUTATIONAL MODELS

以360阶EGM2008地球重力场模型计算的扰动引力矢量作为"真值",对司托克斯积分模型、单层密度模型以及点质量模型的计算效果进行了分析和比较。结果表明:司托克斯积分模型的计算精度最高,但计算速度最慢;单层密度模型计算精度次之,计算速度较慢;点质量模型计算速度最快,但计算精度最差。

Taking the disturbing gravity vectors calculated by the earth gravity field model of EGM2008 in 360 degrees as the ＂true value＂, the computational results of Stokes integral model,the monolayer density model and the point-mass model are analyzed and compared. The results show that if taking account of the computational precision, the Stokes integral model is the best ; if taking account of the computational velocity, the point-mass model is the best. In the specific computation, the proper model should be chosen according to the precision ,velocity, parameters and the other requirements in the case.