Abstract:

To realize the autonomous orbit determination of the compass navigation satellite system (CNSS), a method of integrated orbit determination of the navigation constellation net based on the robust UD factorization filter is proposed. The satellites’ orbit parameters are estimated for a whole navigation constellation net. The observations are authoritied to avoid the effect of the gross error, and the UD factorization filter is used to overcome the instability of filter caused by accumulation of the rounding error. The mathematical model of integrated orbit determination is derived, and the steps of the robust UD factorization filter is presented in detail. Finally, the performance analysis and simulation results indicate the feasibility and validity of this method.