Simulation Framework for Orbit Propagation and Space Trajectory Visualization Figure 14. Velocity states of the chaser and the target spacecraft. Figure 15. Ground track of the chaser and the location ofimpulses. increases as the chaser approaches the target is increasing. It agrees with the fact that since the orbital period of the target orbit is more than the initial orbit, the chaser transfers to orbits with higher angular velocities. Figure 15 indicates the location of the impulses on the map. In this figure, the ground track of the chaser within the orbital maneuver is also illustrated. The size of the red circles corresponds to the magnitude of impulses in each location. Each impulse is acted on the chaser in a different altitude, as detailed in Table 2. According to the results, the chaser starts its first transfer in its initial trajectory, which is an inclined orbit. As 16 the maneuver proceeds, the impulses occur at higher altitudes, which makes the distance between target and chaser decrease. After the final impulse, the chaser is at the same position and velocity of the target where the orbit inclination becomes zero. RESULTS VALIDATION Several verification tests are performed for validating the simulation results in HOMA. The orbit propagation process is the main subject, which has been verified through IEEE A&E SYSTEMS MAGAZINE AUGUST 2021