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SESK: Stuff Everyone Should Know · sesk.info/aero-gps-position-time-signals

Which three quantities can GPS determine precisely?

Position, velocity and time.

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  1. Wind, rain and pressure
  2. Position, velocity and time ✔
  3. Color, mass and temperature

Why: A GPS receiver compares timed radio signals from several navigation satellites. From those measurements it can calculate position, speed and precise time.

Huh, didn't know that: GPS began as NAVSTAR, a space-based radio positioning system.

The dad joke
GPS knows where, how fast and when, a very organized trio.
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References

Answer: Position, velocity and time. A GPS receiver compares timed radio signals from several navigation satellites. From those measurements it can calculate position, speed and precise time.

  1. Journey of Flight Teacher's Guide www.gocivilairpatrol.com/media/cms/2nd_edition_Teachers_Guide_5D3166D76F9B1.pdf
    Position, velocity and time can be precisely determined.
    Checked 2026-10-10.

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