Abstract
A long-term orbital evolution of the Korea Multi-Purpose Satellite-1 is monitored and analyzed in this paper. Four years of orbital evolution is divided into four phases in terms of the operational status of the satellite. Orbit determination results, which are obtained from the satellite’s GPS navigation data, are used to convert the osculating orbit into the mean orbit. Variation of the mean altitude by orbit maneuvers and safe-hold mode operations is also analyzed. Decay of the mean altitude by natural atmospheric drag is correlated with the solar flux variation. Variation of the mean inclination is analyzed in terms of the shift of the local time of the ascending node crossing. The evolution from a near frozen orbit is monitored and analyzed in a phase plot of the mean argument of perigee and mean eccentricity.
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