29 January 2025 by Phillip JohnstonGPS is a marvelous, highly accurate technology with so many wonderful uses. GPS is not just for providing position information – globally synchronized time is a critical function of the system. GPS clocks are used to synchronize clocks in cell towers, power grids, digital television and radio, doppler radar weather reporting, seismic monitoring systems, multi-camera setups for filming, time-stamping ATM and credit card transactions, and more. Yet the degree that we collectively rely on this system leads to vulnerability. GPS signals are quite weak, with a typical power level around -125 dBm, and thus they …
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