• SaltySalamander
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    111 days ago

    three sats determine your accurate position. the fourth is for clock correction only.

    • Saik0
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      211 days ago

      No.

      Satellites project a sphere, you need 4 in order to get to a singular point. I’ve outlined each step. Fourth isn’t for clock correction only. And even outlined why sometimes 3 is okay, but that requires additional logic that many gps devices sometimes can’t compute, and even outlined that the vast majority of devices will use way more than 4.

      https://gisgeography.com/trilateration-triangulation-gps/
      https://www.gps.gov/multimedia/tutorials/trilateration/

        • Saik0
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          11 days ago

          Deleted your comment because you looked at the last image?

          Edit: The images on the site depict the exact thing I’ve been referencing.

          1 satellite = whole sphere of options.
          2 satellites = a whole circle of options
          3 = 2 points
          4 = 1 point.