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Overnight, every civilian GPS receiver on Earth became ten times more accurate,
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May 2

Clinton Unlocks GPS: Navigation Transformed for All

Overnight, every civilian GPS receiver on Earth became ten times more accurate, and the modern world quietly rearranged itself around the improvement. On May 1, 2000, President Bill Clinton ordered the Department of Defense to stop intentionally degrading GPS signals available to non-military users, eliminating a program called Selective Availability that had been scrambling civilian readings since the system's inception. Before the change, civilian GPS was accurate to roughly 100 meters. The Pentagon had deliberately introduced timing errors into the satellite signals, ensuring that only military receivers with the correct decryption keys could achieve full precision. The rationale was national security: the Department of Defense had spent $12 billion developing the Global Positioning System and did not want adversaries using American satellites to guide weapons back at American troops. The decision to remove Selective Availability had been building for years. The Federal Aviation Administration needed better accuracy for aircraft navigation. Farmers were adopting GPS-guided tractors. Emergency services wanted reliable location data for 911 calls. Meanwhile, the military had developed other methods to deny GPS to enemies in specific regions without degrading the global signal. Clinton's executive order dropped civilian accuracy from 100 meters to roughly 10 meters immediately. Within months, the commercial GPS industry exploded. Navigation devices, fleet tracking systems, precision agriculture, and surveying tools all became dramatically more useful. The smartphone revolution that followed a few years later depended entirely on reliable civilian GPS. The economic impact dwarfed anything the Pentagon had envisioned. GPS-dependent industries now contribute an estimated $1.4 trillion annually to the American economy. Every ride-sharing app, delivery route, and location-tagged photograph traces back to a presidential order that cost nothing to implement.

May 2, 2000

26 years ago

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