The $12 billion physics problem solved by 30 satellites
In short: GPS is not just a phone feature; it is a triumph of high-level physics and massive infrastructure. This video explains how we moved from impossible navigation to pinpoint accuracy using atomic clocks and Einstein's theories.
The Global Positioning System (GPS) functions through trilateration using radio waves, but its precision relies on complex scientific foundations including atomic clocks and General Relativity. To maintain this network, the U.S. Department of Defense operates a constellation that typically maintains around 30 satellites; while 24 are required to calculate a position, six extra are often kept in orbit.
The scale of the project is immense, with an initial cost exceeding $12 billion and annual operating costs surpassing $750 million. The video explores these hidden mechanisms to show why modern navigation is one of our most sophisticated technological achievements.
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Sources
- Summary by Intellect · source: GPS: How it Finds You
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