GPS: Why a faith on a Cold War satellite record is an collision watchful to happen

Last June, some-more than 20 ships on a Black Sea beheld something surprising about their satellite-based navigation systems. Instead of their loyal positions good divided from Russia’s south-west border, any ship’s GPS placed it internal during Gelendzhik Airport, a tiny depot that serves a lifelike coastal town.

It done no sense. The Global Positioning System (GPS), a network of satellites that we rest on each day, is frequency wrong. When it is, a domain of blunder is usually a few metres. The ships on a Black Sea were 20 miles from Gelendzhik.

There seemed to be usually one explanation, nonetheless it was not one anybody wanted to countenance: GPS, a navigation and timing complement on that a world…

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