Hybrid Integrity for Precision Guidance and Landing

"Under this Phase I effort it is proposed to develop a design for a hybrid integrity solution solution for precision approach and landing in a GPS jamming environment. The proposed integrity solution leverages the capabilities of next generation digitalspatial processing and ultra-tightly-coupled (UTC) GPS/inertial integrated military User Equipment (UE). Under this effort we will assess the failure modes inherent in the GPS system and UE and evaluate the effectiveness of the proposed GPS/InertialReceiver Autonomous Integrity Monitoring (GI-RAIM) algorithms in assuring the integrity, availability and continuity of the GPS observations during the challenging precision approach and landing phase of operation. The GI-RAIM algorithm will use thespatial diversity provided by the digital spatial processing algorithms to detect GPS and UE failure modes and will embed failure detection and isolation algorithms within the UTC signal processing algorithms. An analysis will also be included of analgorithm designed to perform carrier phase tracking integrity monitoring embedded within the Kinematic Carrier Phase Tracking (KCPT) positioning algorithms. This multi-level integrity monitoring approach will be evaluated first through simulation. UnderPhase II, test data will be collected to demonstrate the GI-RAIM algorithm performance in an UTC GPS/inertial digital spatial processing test-bed The modular nature of the GI-RAIM GPS/inertial integ