Why GPS Is Under Attack - The New York Times - https://www.nytimes.com/interactive/2024/07/02/world/gps-threats.html

This year alone, researchers say, more than 60,000 commercial flights have been hit by bogus GPS signals, which can confuse pilots. The American GPS network that was once the gold standard is at risk of becoming a relic as Chinese, Russian and European systems modernize. Without GPS, much of modern life would falter. Delayed ambulances. Extended power cuts. No cellphone signals. Yet the U.S. has no civilian backup system. GPS is simple, trustworthy and always on. It is also vulnerable. GPS satellites blanket the world with two pieces of information: where they are in orbit and what time it is. The time it takes for a signal to reach your cellphone lets it know how far it is from the satellite. By listening to four satellites at once, your device can pinpoint your location on Earth. These superaccurate satellite clocks also help synchronize computer systems, like those that tell stock markets whose trades arrived first. Yet GPS is easy to manipulate. Jamming attacks drown out satellite

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