The Defense Advanced Research Projects Agency plans to demonstrate a positioning, navigation and timing system that willÂ useÂ very low frequency band signals as backup in case militaryÂ forces lose access toÂ GPS networks.
Lin Haas, DARPA strategic technology officer, discussed theÂ Spatial, Temporal and Orientation Information in Contested Environments project at DARPA Demo Day, the U.S. Army said May 19.
DARPA plans to demonstrate the STOIC system byÂ fiscal year 2018 or 2019 while an at-sea demo will be conducted this year.
Haas said the agency is working with the ArmyÂ Communications Electronics Research Development and Engineering Command to develop STOIC as aÂ backup PNT system that will provide globalÂ coverage and support application forÂ naval surface and aviation.
There are VLF stations in fixed locations across the globe and the U.S. Navy uses VLF signals to communicate with submarines.
Haas showed a videoÂ wherein a vehicle’s route was tracked through a combination ofÂ inertial navigationÂ andÂ a VLF signal.
The Army said the line that trackedÂ the route moved “erratically” but stayed near the vehicle and Haas explained these movements as the effect ofÂ magnetic interference from things in the area.
Haas added DARPAÂ is working to address the interference and it does not affect aerial or at-sea tracking.