Abstract: To improve the Xray pulsarbased navigation (XNAV) practice performance in engineering, a novel navigation system using single Xray detector is proposed. The fundamental observed quantity is the difference between the observed arrival time and the predicted arrival time of pulse . The batch weighted least square filter used in Deep Space 1 of USA is applied to estimate the position and velocity of the spacecraft in the interplanetary cruise phase. The condition of Deep Space 1 is adopted in the simulation. The influence of the factors such as number of pulsars, the batches of the measurement data and the orbit determination period, is analyzed in the simulation. The comparison between the batch weighted least square filter and the Kalman filter is made as well. The simulation results show that the proposed system is feasible and effective in the spacecraft interplanetary cruise phase.

Key words: autonomous navigation, pulsar, interplanetary cruise, weighted least square filter