Rockewell-collins 3s gps receivers will be integrated on several Navy surface platforms. These receivers provide a position accuracy of I6m (I sigma). If they had a differential gps capability, the achievable accuracy would be better than 5m (I sigma). This effort identifies the Navy missions that would benefit from such an improved accuracy, defines system-level requirements for a differential capability, assesses several implementations using the 3s receiver, performs a cost, performance and ease of implementation tradeoff among these implementations, and simulates the preferred implementation on our existing, high-fidelity collins receiver/gps environment simulator.
