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Source: https://www.calcalistech.com/ctech/articles/0,7340,L-3863132,00.html
Israel Develops New Navigation System Immune to GPS Jamming
(Calcalist) Udi Etsion - GPS-jamming techniques have been used against Israeli forces in various arenas, including by a foreign power operating in Syria. In response, Israeli defense contractor Rafael was asked by the IDF to develop a battlefield navigation system for armored vehicles that does not rely on GPS. The solution, CT-MENTOR, involves a series of cameras installed on combat vehicles that scan the surroundings, creating a 3D image. This image is then combined with previous aerial photos and satellite images, enabling the system to determine the vehicle's exact location to within five meters. Brig.-Gen. (ret.) Shmuel Olanski, former head of the IDF Armored Corps, noted: "The vehicles already carry multiple cameras for their intel and weapons systems, so we can use them to calculate their location, too."