Explaining GPS to a Dead Man

how does GPS actually know where you are

@okayfine

Okay but that's exactly my objection. My phone has a two-dollar quartz crystal in it. It cannot measure nanoseconds. It can bar…

Systems Engineer

Correct, and it's worse than you think. Your phone's clock is off from GPS time by milliseconds, easily. A millisecond is 300 k…

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