Abstract
For formation flight missions, it is often required for the satellite members to maintain a favorable relative position. There have been many researches about the navigation, guidance and control on the formation flight. But many of those researches are on the active control, that is, the control with delta-V mostly in circular orbits. Although the passive geometry maintenance without fuel should be emphasized for the mission life, there is little such research about it. Furthermore, the most researches for formation flying have dealt with the circular orbit using the Hill's equation. This paper discusses the design method for maintaining the formation geometry without performing orbit control on the elliptic orbits.
