Non-GPS Projectile Navigation

"The objective of this Phase I SBIR is to provide an alternative approach for guided projectiles to continue navigation in situations where the GPS signal is unusable because of enemy jamming. Our proposed navigation solution is to modify the guidedprojectiles' existing GPS receiver to allow it to use the jammer signals themselves as a source of navigation information to update the on-board inertial navigation system once the J/S level exceeds the ability of the GPS receiver to maintain lock. Thesystem relies on a network of small UAVs, such as the Smart Warfighting Array of Reconfigurable Modules (SWARM) UAVs. These provide jammer location sensor data to a shipboard master station which precisely geolocates the jammer sources. This informationis passed to the GPS-guided weapon prior to launch. The SWARM UAVs then provide data directly to the projectile in flight to support this back-up navigation mode.In phase I we will demonstrate the feasibility of this concept through a combination of simulation and testing. In Phase II we propose to deliver a prototype navigation system that can be used to demonstrate the system performance during field tests. Because of the susceptibility of GPS to interference there is a growing need for civil and Government agencies to be able to have a back-up capability to operate in the presence of GPS interference. The proposed navigation solution has application to allGPS precision-guided weapons a