An effective shift method for multi-satellite operations in KGS

Most of the earth observation satellites are remote sensing satellites in low-earth sunsynchronous orbit, and send data obtained from various sensors and cameras mounted on the craft to utilize them for geological and environmental research, and in a wide range of applications such as monitoring natural disasters. KOMPSAT satellite can monitor largescale natural disasters, and identify the utilization of natural resources and high-resolution earth observation images that can be utilized in the field of geographic. A mission orbit of KOMPSAT-1 & 2 & 3 is 685km sun-synchronous with a 28-day ground repeat cycle. The KOMPSAT-5 is the first synthetic aperture radar satellite of South Korea, and its mission orbit is 550km sun-synchronous dawn-dusk orbit with a 28-day ground repeat cycle. Since the KOMPSAT-1 was launched at December, 1999, KOMPSAT series have been being operated by KGS over 14 years. A KOMPSAT series in low-Earth orbit which requires short contacts every 98 minutes tend to drive 24-hour/7-days operation in order to satisfy mission requirements. Because actual shift schedules vary widely, the shift schedule should be designed based on employee preferences, company policy, and the circadian rhythms principle which dictates that the rotation always be clockwise. A poor shift schedule can lead to low employee morale, decreased productivity, and mistakes that affect the mission. Conversely, a well-constructed shift policy can result in higher productivity, better health, and less time loss. In this paper, I would like to describe a shift method for multi-satellite operations in KGS and the operation concept for the KOMPSAT series.