Relative states autonomous determination of satellites formation flying

Relative states autonomous determination is very important for formation flying. In this paper,based on AFF technology, a relative states autonomous determination algorithm for formation flying is brought forward. Relative orbit and attitude motion equation of double satellites formation are taken as states equation. Measurement model is set up based on intersatellite measurement by GPS-like sensors and the measurement equation is established accordingly. A kind of double SKF sub-filters capable of calculating parallelly is put forward to estimate the orbit and attitude parameters at the same time. Comparing the mathematical simulation results of double SKIP sub-filters with that of EKF shows the feasibility and rapidity of the proposed algorithm.