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The COMS will be located at 128.2 deg East in geostationary orbit with three missions, one is a continuous monitoring of imagery and extracting of meteorological products, another is a monitoring of marine environments around Korean peninsular. The other is experimental telecommunication with Ka band payload. In space, especially geostationary orbit. various space circumstances, especially eclipse should be considered to operate the COMS in safety. The eclipse management which has two types of the Sun eclipse that causes a geostationary satellite to be in the shadow. The most common one is caused by the Earth blocking the sunlight and happens near equinoxes. The Earth caused eclipses can continue up to 45 days around equinox with the satellite being in the shadow up to 72 minutes each day. The eclipse estimation which is classified with the Sun eclipse by the Moon. the Sun eclipse by the Earth and the Moon eclipse by the Earth, are required for the purpose of the payloads and satellite operation. On station, two sub-system are concerned by the Sun eclipse, the one is AOCS because the Sun is used in normal mode for yaw estimation, the other is electrical power subsystem, because there is no more the Sun on the solar array to provide the power. We estimate entry and exit of eclipse of partial and total eclipse from geometrical relationship between the Sun, the Moon, the Earth and the COMS. This estimation is based on the stationkeeping simulation plan which will be done with 7 days period.

목차

Abstract
1. INTRODUCTION
2. ECLIPSE ESTIMATION
3. STATION-KEEPING SIMULATION
4. ECLIPSE MANAGEMENT
5. SIMULATION RESULT
6. CONCLUSIONSIONS
ACKNOWLEDGMENTS
REFERENCES

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