摘要
根据模拟的CHAMP卫星星历,分别采用基于牛顿运动定律的数值微分法和基于能量守恒定律的能量守恒法建立观测方程,恢复出50阶次的重力位系数。同时,考虑到CHAMP卫星位置、速度和加速度存在的误差,分析了这两种方法对各项精度指标的敏感程度,并比较了这两种方法的优缺点。
In this paper,observation equations are constructed according to the numerical differentiation based on Newton's law of motion and the energy conservation respectively.The gravitational potential coefficients are recovered until degree 50 based on simulated CHAMP ephemerides.The sensitivity to different precision are analyzed considering the errors in the satellite position,velocity and acceleration of CHAMP.The merits and disadvantages of these two methods are demonstrated.
出处
《测绘科学》
CAS
CSCD
北大核心
2005年第5期22-25,共4页
Science of Surveying and Mapping
关键词
CHAMP卫星
重力位系数
数值微分
能量守恒
CHAMP,gravitational potential coefficients
numerical differentiation
energy conservation
