Development and testing of Satellite Operation System for Korea Multipurpose Satellite-I

The Satellite Operation System (SOS) has been developed for a low earth orb iting remote sensing satellite, Korea Multipurpose Satellite-I, to monitor and control the spacecraft as well as to perform the mission operation. SOS was designed to operate on UNIX. in the HP workstations, In the design of SOS, flexibility, reliability, expandability and interoperability were the main objectives, In order to achieve these objectives, a CASE tool, a datab ase management system, consultative committee for space data systems recomm endation, and a real-time distributed proc easing middle-ware have been int egrated into the system. A database driven structure was adopted as the bas eline architecture for a generic machine-independent, mission specific data base. Also a logical address based inter-process communication scheme was i ntroduced for a distributed allocation of the network resources. Specifical ly, a hot-standby redundancy scheme was highlighted in the design seeking f or higher system reliability and uninterrupted service required in a real-t ime fashion during the satellite passes. Through various tests, SOS had bee n verified its functional performance, and interface requirements, Design, implementation, and testing of the SOS for KOMPSAT-I is presented in this p aper.