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How does a GPS receiver figure its distance from a GPS satellite?

Yeah, the home page did kind of gloss over a few details. Let's back up and take a closer look, starting with some basic physics:

We know [speed] because GPS signals are electromagnetic waves, which travel at light speed (approximately 300,000,000 meters per second).

We can figure [travel time] by comparing [time sent] and [time received].

Piece of cake! Right?

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