Exploring orbit motion characteristics of spacecraft under constant radial thrust acceleration

Aim: The introduction of the full paper discusses relevant matters and then proposes the exploration mentioned in the title, which is explained in sections 1 through 3. Their core consists of: "Firstly, based on non-Keplerian orbit theory, we establish the dynamics model of the spacecraft under constant radial thrust in inertial frame. Under the constant radial acceleration, the moment of momentum of the orbit is constant, while the energy of the spacecraft is changed. Then, the conditions for spacecraft orbiting earth under constant radial thrust are analyzed in the general form of elliptical initial orbits, and the equations for solving critical acceleration are derived. " Finally, section 4 studies respectively the two cases of elliptical and circular initial orbits. Simulation curves are presented in Figs. 1, 2 and 3 and we analyze these curves with the help of Figs. 4, 5 and 6. These simulation curves and their analysis are, in our opinion, useful for the design of maneuver orbits.