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A hybrid integrity solution for precision landing and guidance

A design was developed for a hybrid integrity solution for precision approach and landing in a GPS jamming environment. The integrity solution described in this paper leverages the capabilities of next generation digital spatial processing and ultra-tightly-coupled (UTC) GPS/inertial integrated military user equipment (UE). A design is also included for a spatial environment integrity monitor, for a GPS/inertial receiver autonomous integrity monitor solution (GI-RAIM) that allows detection of small error drift rates before the inertial solution can be corrupted and an integrity monitoring function embedded within the kinematic carrier phase tracking (KCPT) algorithms which provides a level of confidence on the final KCPT positioning data output. Simulation and test results showing the expected performance of this multi-level integrity monitoring approach are presented. A design for an aircraft GPS/inertial digital spatial processing receiver, the HAGR-A, is also included which will be used as a test bed for implementation and testing of these integrity monitoring techniques.