Coordinated Universal Time, or U.T.C., the global reference for timekeeping, is beamed down to us from extremely precise atomic clocks aboard Global Positioning System (GPS) satellites. The time it takes for GPS signals to reach receivers is also used to calculate location for air, land and sea navigation……
The problem is that GPS signals are incredibly weak, due to the distance they have to travel from space, making them subject to interference and vulnerable to jamming and what is known as spoofing, in which another signal is passed off as the original. And the satellites themselves could easily be taken out by hurtling space junk or the sun coughing up a fireball. As intentional and unintentional GPS disruptions are on the rise, experts warn that our overreliance on the technology is courting disaster, but they are divided on what to do about it.
Impact of GPS Security
More than 10,000 incidents of GPS interference have been linked to China and Russia in the past five years. Ship captains have reported GPS errors showing them 20-120 miles inland when they were actually sailing off the coast of Russia in the Black Sea. well documented are ships suddenly disappearing from navigation screens while maneuvering in the Port of Shanghai.
Alternative of GPS
“China, Russia, Iran, South Korea and Saudi Arabia all have eLoran systems because they don’t want to be as vulnerable as we are to disruptions of signals from space,” said Dana Goward, the president of the Resilient Navigation and Timing Foundation, a nonprofit that advocates for the implementation of an eLoran backup for GPS.
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