The USAF requires a Non-GPS Based Positioning System (NGBPS) subsystem capable of operating and providing sub-meter position accuracy in a GPS-denied (jamming) environment. 

The NGBPS portion of the 746th Test Squadron’s Ultra-High Accuracy Reference System (UHARS) program employs a network of ground-based “LocataLite” transceivers and test vehicle receivers (also called “Rovers”) manufactured by the Locata Corporation. Although the NGBPS uses Locata’s standard commercial LocataLites and rovers, meeting the demanding UHARS accuracy and distance requirements of better than 18 centimeters accuracy over a 30 mile range in a flight configuration necessitated some additional testing and development of transmit antennas, external signal amplification, navigational software for flight dynamics, as well as the addition of a centralized command and control (C2) capability so the network could be remotely controlled, across the range, from the 746 TS building at Holloman Air Force Base

As designed, deployed, and validated, this tailored network provides accurate 3D positioning, completely independent of GPS and while traveling in a dynamic aircraft flight profile. This enables the US government to test, evaluate, and assess capabilities in GPS-denied environments. Based on successful results of the original technical demonstration at WSMR in a real-world end-to-end environment, the USAF proceeded to the NGBPS production and fielding phase.  The currently installed network infrastructure on White Sands Missile Range includes 20 permanent monument sites, 16 LocataLite trailers installed in select initial site locations, comprehensive Command and Control software, and solar and battery power for all sites. The system is self-contained, remotely operated and possesses high quality, reliability and safe operation attributes. Its NGBPS capability is now core to the UHARS. Initial testing shows that UHARS delivers accurate independent PNT as good as, or better than, the USAF’s current truth reference system, and the 746 TS has therefore declared Initial Operational Capability (IOC) for UHARS, making it immediately available to support customers requiring an accurate non-GPS-based solution.