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How GPS works

How GPS works
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Back in the day when I bought my first GPS device, a Garmin eTrex rigged to my old Compaq iPaq running a TomTom application, GPS devices were not exactly common. Cars didn’t have them build in yet and a simple receiver like the Garmin eTrex was considered hi-tech and wasn’t really able to do any sensible route planning like we see now a days.

In this article I’ll try to explain how GPS works, and I’ll show some examples of devices and uses of GPS.