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The design approach used on this GPS integration is different from that used on the E-4B GPS integration. The approach used on the E-4B involved replacing the existing INSs with new INSs that could accommodate the GPS information. This design approach utilizes an FMS to integrate the navigation sources (INS, GPS, RNAV) to formulate the navigation solution. The FMS solution provides better capabilities for flight planning, flight plan/route display, and future growth than the original E-4B design. Technical limitations prevented use the FMS solution on the E-4B at the time of the original design. This type of approach is currently being used to integrate GPS on many aircraft. Is your approach similar to this? How is it different? Are you integrating GPS thru an FMS (as shown below) or thru the INS (as shown for the E-4B GPS integration)? Is your approach taking maximum advantage of GPS and all that it has to offer? We may be able to help. A detailed diagram of an FMS-based GPS integration is summarized below. Enjoy. Note: To keep the detail & maintain the flow, scrolling may be required. Sorry for any inconveniences.

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	Keywords: Concept Research Development Integration Integrated Aviation Avionics Aircraft Flight Controls Autopilots Navigation Guidance Analysis Simulation Software Algorithms Hardware Interfaces Requirements Engineers HITL FCS GPS FMS UAV Systems