Orbital slots and frequency bands for geostationary satellites are not enough to operate them in Korea. At 128.2° E., Communication, Ocean, Meteorological Satellite (COMS) is placed and two more GEO-KOMPSAT2 (GK2) A and B satellites in the same window will be launched in 2018 and 2019. Thus the strategy of collocation is required to operate satellites safely. The most popular strategy is to control eccentricity and inclination vectors to operate within narrow control-box. However, the uncertainty of orbit determination (OD) using single station tracking data is so high in the operation of three satellites at the 128.2°E. from the ground station of the 127.4°E. Also another issue is since three satellites have only one side solar panel they have to perform wheel-off loading (WoL) maneuver for momentum dumping twice per day. Collocation strategy in COMS should overcome these OD uncertainties and take into account daily WoL maneuver time. According to the operation scenarios of COMS, GK2A, and GK2B, both longitude separation method and the novel combined eccentricity and inclination vector control strategy will be applied and validated by calculating the relative position differences for each satellite.
展开▼
