• Ulrich
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    -213 days ago

    The earth isn’t flat.

    So which coordinate accounts for elevation? Latitude or Longitude?

    • Saik0
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      312 days ago

      Lat/Long is only valid if elevation is valid. You can’t reference a lat/long that is miles into space… or beneath the crust of the earth.

      • Ulrich
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        -112 days ago

        It’s like you’re making my point for me.

        • Saik0
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          212 days ago

          A watch… or other simple gps device doesn’t know what the elevation is.

          Only one of the 2 selected points in a 3 satellite setup will be valid. And your device would have no idea which one is valid without elevation knowledge or a 4th satellite. Some devices can figure it out with just 3 satellites. Many/most won’t. But ultimately it’s the same thing. You need 4 pieces of input. Either 3 satellites AND elevation. Or 4 satellites.

          So no. I’ve not made a point “for” you. You’re just ignorant or specifically being obtuse on something you clearly don’t understand.

          • Ulrich
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            -112 days ago

            A watch… or other simple gps device doesn’t know what the elevation is.

            My point, exactly

            • Saik0
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              212 days ago

              Which is why they’d need 4 satellites. Read the whole post. Read the given sources. Stop being stupid.

              • Ulrich
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                -112 days ago

                I did read the whole post. Stop being an asshole.

                • Saik0
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                  112 days ago

                  Clearly you didn’t… You keep asserting false statements that have already been disproven with sources.

                  But ultimately it’s the same thing. You need 4 pieces of input. Either 3 satellites AND elevation. Or 4 satellites.

                  If a watch doesn’t “know” elevation (barometer or other sensor providing such information) as the fourth data point… Then it NEEDS 4 satellites to make the data points whole. Making your statements yet again wrong. I’ve covered the cases… but you keep pushing false statements like “gps is triangulation” (completely incorrect) or “GPS uses 3 satellites” which is also only correct in one very specific case… Where it’s largely 4 or more, with reality being more like as many satellites as the device can read the pulses for. Often being a dozen or even more…

                  I am making accurate and complete statements. You are the one peddling misinformation.

                  Hell to prove the point… my time server grabs GPS as it’s primary source. It grabs up to 12 satellites to sync time. It shows me my sync status for lat/long as well… At 3 satellites it CANNOT get a lock for location OR time. At 4 it gets a weak lock.

                  • Ulrich
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                    -112 days ago

                    You keep asserting false statements that have already been disproven with sources.

                    I don’t. You just aren’t paying attention to what I’m saying. You keep arguing up a strawman.