in reply to Re^16: Converting GPS seconds to readable time&date (relativity)
in thread Converting GPS seconds to readable time&date

According to this they circulate the Earth at 3.9 km per second. But that's deceptive because its the relative speed of the observer that is crucial.

And that waxes and wains like the tides, and oscillates sinusoidally at twice its orbit frequency, with its progression around the orbit. And then there's that it is moving in an orbit relative to a point that is moving in a smaller orbit, so a bit like spirograph if you ever saw the toy.

Now we know why all the relativity examples use straight line motion away and back from a distant point :)

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