Abstract: Subject to the homing and phasing maneuvers as well as constraints of the maximal link distance of the relative navigation,the limited liaison time of the relative navigation and the maximal delay permitted by the crew schedule.For various homing maneuver modes,the relationship between the velocity error from the phasing maneuver and the dispersion zone of the initial point of the drift phase were established,and the dispersion zone of the nominal position of the initial point of the drift phase were given.