Performance Improvement of Real Time On-board Orbit Determination using High Precision Orbit Propagator

Abstract

In this paper, a real-time on-board orbit determination algorithm using the high precise orbit propagator is suggested and its performance is analyzed. Orbit determination algorithm is designed with the Extended Kalman Filter. And it utilizes the orbit calculated from the Pseudo-range as observed data. The performance of the on-board orbit determination method implemented in the GPS-12 receiver is demonstrated using the GNSS simulator. Orbit determination performance using high precise orbit propagator was analyzed in comparison to the orbit determination result using   orbit propagator. The

Sensitivity of the Gravity Model and Orbital Frame for On-board Real-Time Orbit Determination: Operational Results of GPS-12 GPS Receiver

“…To confirm its effectiveness in reducing the ionospheric time delay, the accuracy of the orbit determination logic was analyzed on the RIC frame using the reference orbit from the GPS simulator. Moreover, the performance of the orbit determination logic using the RIC orbital frame was compared with its accuracy using the ECI orbital frame, which was summarized in previous research [12]. The system model in Figure 6 was the orbit model used in previous research, composed of the gravity model (Earth gravity, EGM96 (up to the 40th degree and order), third body) and the non-gravity model (atmospheric drag, solar radiation pressure) [12].…”

“…Moreover, the performance of the orbit determination logic using the RIC orbital frame was compared with its accuracy using the ECI orbital frame, which was summarized in previous research [12]. The system model in Figure 6 was the orbit model used in previous research, composed of the gravity model (Earth gravity, EGM96 (up to the 40th degree and order), third body) and the non-gravity model (atmospheric drag, solar radiation pressure) [12]. The RIC orbital frame was applied to the on-board orbit determination logic of GPS-12 in DubaiSat-2, and its practical performance is verified in Section 4.…”