Orbit determination system for the KOMPSAT-2 using GPS measurement data

A GPS-based orbit determination system for the KOMPSAT-2 has been developed. Two types of orbit determination software such as operational orbit determination and precise orbit determination are designed and implemented. GPS navigation solutions from on-board the satellite are used for the operational orbit determination, and raw measurements data such as C/A code pseudorange and L1 carrier phase are processed for the precise orbit determination. Operational concept, architectural design, and performance test are described.