StarFire is a double frequency global differential GPS difference Positioning System, which was founded by NAVCOM. It is the first star-based strengthening differential system, which can provide decimeter real-time precision at the present world. When using StarFire Network System, the user needn’t consider that RTK must work within the appropriate distance range which can ensure the credibility of differential data transmission and the positioning precision. The whole StarFire System consists of five parts which are References Station, Data Processing Centre, Injection Station, Inmarsat, and User Station.