Repeat Ground Track Orbit Design Aiming at Maximizing Average Access Ratio of Terrestrial-Satellite Terminals

An orbit design method for repeat ground track (RGT) satellites aiming at maximizing average access ratio (AAR) of terrestrial-satellite terminals (TSTs) is proposed in this paper. Several TSTs are located in different places, their AAR is deduced and employed as the objective to design the orbit, constraints of the regression error in orbit are also deduced and the optimization problem which the optimal orbit satisfies is obtained. The objective is transformed by using the penalty function and the Particle Swarm Optimization (PSO) is adopted to solve the optimization problem. Compared with previous work, ours has two contributions: one is that the expression of the objective to design the orbit is deduced, the other is that the adopted algorithm to solve the optimization problem has a better performance for outputting the global optimal solution.