Miniature High-Altitude Precision Navigation Alternative

ABSTRACT: Today"s advanced precision guided weapons rely on GPS/INS based solutions to provide accurate navigation data, enabling the munition to adjust its path to reach the target. However, GPS is susceptible to jamming, and therefore new approaches are needed that can provide the same level of navigation accuracy while operating in a GPS-denied environment. Under this effort, we will develop a sensor fusion system based on a Bayesian framework that combines the measurements from a set of complementary sensors, such as a star tracker, a magnetometer a horizon sensor, and signals of opportunity, to aid in navigation. We will develop efficient inferencing techniques that enable us to combine the measurements within the stringent time constraints of high speed munitions. We will perform trade studies to understand the relative impacts of each of the sensor types, and perform sensitivity studies to determine sensor performance specifications required to achieve GPS-level performance. We will compare these specifications to existing hardware, and perform an analysis of the size, weight, and power requirements. This will drive the Phase 2 analysis of specific weapon systems. BENEFIT: The resulting system will enable GPS-level navigation accuracy in GPS-denied environments. This has applicability not only to munitions, but also to UAVs and manned systems. It also has commercial potential for supersonic transport, and space applications.