Answering the call for military flight test applications, Naval Air Warfare Center Weapons Division, China Lake engineers invented a triple redundancy solution for precise position, navigation and timing (PNT) in a low cost, size, weight, and power (c-SWAP) solution. Global positioning system (GPS) is accurate to a few meters, but the new Time-Space-Position-Information (TSPI) technology, using differential corrections, could be accurate to within a few centimeters. The invention uses an onboard inertial navigation system tightly coupled with GPS but also adds an independent onboard PNT system using pseudo-satellites (“pseudolites”) and ground-based algorithms to locate the air vehicle transmitter signals. The invention provides the Navy with a novel approach for TSPI in several areas, including GPS denied environments, highly dynamic aircraft, unmanned air vehicles, and highly-dynamic guided weapons. This new technology could be a game-changer by enabling a more accurate, reliable, cost-effective addition to the use of GPS for some manned and unmanned systems flight testing and their integration into NextGen. While this patent is primarily for military applications, possibilities exist for commercial aviation as well.