Abstract: Rendezvous between two spacecraft is a very important spaceflight mission . Based on the C-W equation, equations with both rectangular coordinates and orbital elements for the impulse maneuvers in long-distance guidance are derived. The iterative processes for solving equations are given. As the maneuvers are applied, the variables are not enough to satisfy all the final-time constraints. This paper gives the partial variable aiming method to satisfy some of the final-time constraints. Numerical simulations show that partial variable aiming method can aim concerned variables.

Key words: rendezvous, quasi-circular orbit, multi-impulse, aiming algorithm