한국항해항만학회:학술대회논문집 (Proceedings of the Korean Institute of Navigation and Port Research Conference)
- 한국항해항만학회 2006년도 International Symposium on GPS/GNSS Vol.1
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- Pages.367-370
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- 2006
LEO Satellite Time Synchronization Architecture
- Kwon, Ki-Ho (Korea Aerospace Research Institute) ;
- Kim, Day-Young (Korea Aerospace Research Institute) ;
- Lee, Jong-In (Korea Aerospace Research Institute) ;
- Kim, Hak-Jung (Korea Aerospace Research Institute) ;
- Lee, Sang-Jeong (Department of Electronics Engineering, Chungnam National Univ.)
- 발행 : 2006.10.18
초록
A GPS-based time synchronization technique employing a refined HW circuitry and SW algorithm is considered as fine time-management system for Low Earth Orbit (LEO) remote sensing satellites. By synchronizing the On-Board Time (OBT) within satellites to the GPS 1PPS, a very expensive, highly accurate on-board clock is not required to determine the precise on-board time management. Also, the satellite command generation in ground stations and postprocessing of earth observation data which a particular image is acquired. This paper analyses on-orbit verification of the existing satellite time sync architecture and presents a new time sync architecture, operation and relation between the OBT and the GPS time.