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Legacy Navigation: Evaluating GPS Receiver Vulnerabilities in the Week Rollover Scenario

Legacy Navigation: Evaluating GPS Receiver Vulnerabilities in the Week Rollover Scenario

Pages 8 Pages

As global dependence on GPS for positioning, navigation, and timing grows, concerns have risen about how legacy receivers handle the GPS Week Number Rollover. These older units rely on L1 band signals at 1575.42 MHz, which include the publicly available C/A code and the restricted P code for higher accuracy. Because legacy receivers were not designed for repeated rollover events, they may misinterpret time data, leading to navigation errors and service disruptions. Evaluating these vulnerabilities is essential to maintaining reliable GPS‑based operations.

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