The Patch of Sky Where GPS Quietly Lies

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Over the South Atlantic there is a region where Earth's magnetic field is unusually weak, and satellites crossing it take radiation hits they take nowhere else. Instruments glitch. Operators route around it. The weak patch is still growing, and why it behaves the way it does is not settled.

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The Patch of Sky Where GPS Quietly Lies

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The Patch of Sky Where GPS Quietly Lies