Comparative Evaluation of Statistical Orbit Determination Algorithms for Short-Term Prediction of Geostationary and Geosynchronous Satellite Orbits in NavIC Constellation
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NavIC is a newly established Indian regional Navigation Constellation with 3 satellites in geostationary Earth orbit (GEO) and 4 satellites in geosynchronous orbit (GSO). Satellite positions are essential in navigation for various positioning applications. In this paper, we propose a Bootstrap Particle Filter (BPF) approach to determine the satellite positions in NavIC constellation for short duration of 1 hr. The Bootstrap Particle filter-based approach was found to be efficient with meter level prediction accuracy as compared to other methods such as Least Squares (LS), Extended Kalman Filter (EKF), Unscented Kalman Filter (UKF) and Ensemble Kalman Filter (EnKF). The residual analysis revealed that the BPF approach addressed the problem of non-linearity in the dynamics model as well as non-Gaussian nature of the state of the NavIC satellites.
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