정지궤도에서 운용되는 천리안 위성은 우리나라 최초로 자체 개발된 정지궤도 위성 실시간 운용 시스템에 의해 정상적으로 운용되고 있다. 천리안 위성 실시간 운용 시스템이 게발되기 전까지는 아리랑 위성을 위한 저궤도 위성 운용 시스뎀이 국산화되었다. 그러나 천리안 위성은 아리랑 위성과는 달리 위성과의 교신시간, 데이터 처리량, 원격명령 전송방식, 테이터테이스 구성, 시간정보 처리 등 여러 가지 면에서 다른 특성을 갖는다. 따라서 천리안 위성 운용 시스템은 정지궤도 운용 특성을 고려해 구현해야 했으며, 특히 Eurostar 3000 버스를 지원하는 기능들이 구현되어야 했다. 본 논문은 정지궤도 위성의 실시간 운용 시스템 개발 과정에서 발생한 문제점들을 살펴보고, 그로부터 겪은 시행착오와 기술 개발의 교훈을 기술한다.
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