摘要
双频星载GPS非差运动学定轨法的定轨精度完全取决于观测数据的质量,单独利用伪距观测量会导致定轨精度低,单独利用载波相位观测量容易导致法方程奇异。对非差运动学精密定轨伪距和载波相位观测量加权进行了分析,在保证获取同单独采用载波相位观测量运动学定轨相当精度的条件下,提高了定轨运算的稳定性和解算速度。用GRACE(gravity recovery and climate experiment)卫星2006年1月3日实测数据作为算例验证了该加权方法的有效性。GRACE卫星实测数据的仿真结果表明:伪距和载波相位观测量加权的非差运动学精密定轨,在R、T、N方向的定轨精度分别为3.93cm、3.19cm、3.34cm,三维位置精度为6.07cm。
The accuracy of space-borne dual-frequency GPS zero-differential kinematic orbit determination all depends on the quality of observational data.Using pseudo-range observation alone may lead to low accuracy of orbit determination and using carrier phase observation alone may lead to singularity of the normal equation.This paper analyzes the weighing of pseudo-range and carrier phase observations for zero-differential kinematic precise orbit determination.In condition of guaranteeing attaining the equivalent accuracy of kinematic orbit determination using carrier phase observation alone,this method improves the stability and the resolving rate of kinematic orbit determination meanwhile.The observational data from GRACE （gravity recovery and climate experiment） satellites of January 3th 2006 are used as an example verifying the validity of this weighing method.The simulation results of GRACE satellites observational data show that the kinematic orbit determination using weighing of pseudo-range and carrier phase observations attains the RMSs （root of mean square） in the directions of R,T and N are 3.93 cm,3.19 cm and 3.34 cm,and the RMS in the threedimension is 6.07 cm.
出处
《国外电子测量技术》
2014年第6期48-53,共6页
Foreign Electronic Measurement Technology
关键词
非差运动学
精密定轨
伪距
载波相位
加权
zero-differential kinematic
precise orbit determination
pseudo-range
carrier phase
weighing
