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For over two decades systems such as Global Positioning System (GPS) and Galileo have been used for commercial and military positioning and navigation. In recent years further satellite constellations have been added and these Global Navigation Satellite Systems (GNSS) provide reliable, accurate worldwide coverage. However, all these systems are vulnerable to Jamming and Spoofing.

The UK Ministry of Defence has launched an initiative called Alternative Navigation for Weapon Systems, which aims to explore alternatives to GNSS for military navigation.

The system should be developed and trailed within the next three years for civilian and military applications and should be at a Technology Readiness Level of 4 or above. 

The potential system should be developed to an operational level in either a civilian or on military application. The system should not be solely reliant reliance on GNSS, and should have the potential to be further developed to meet military specifications. The system should have sufficient accuracy to monitor position during deployment to within 5 meters, according to