Special Topics - GPS (65 of 100) What is Reference Ellipsoid

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  • เผยแพร่เมื่อ 29 ต.ค. 2024
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    We will learn The Reference Ellipsoid is a mathematically derived surface that approximates the shape of the globe. It includes undulations of the Earth’s gravity due to variations of the composition and density. This allows us to find points on the Earth’s surface much more accurately.
    Previous video in this series on TH-cam: • Special Topics - GPS (...
    Or search title for other platforms: Special Topics - GPS (64 of 100) ECEF: Earth Centered Earth Fixed Coordinate System
    Next video in this series on TH-cam: • Special Topics - GPS (...
    Or search title for other platforms: Special Topics - GPS (66 of 100) WGS 84 World Geodetic System

ความคิดเห็น • 13

  • @Nerd3927
    @Nerd3927 ปีที่แล้ว +1

    This is the GRS80 reference ellipsoid. Many local datums use an older one, like the Bessel 1841 for the Dutch RijksDriehoekstelsel.

    • @MichelvanBiezen
      @MichelvanBiezen  ปีที่แล้ว +1

      Yes indeed. Thank you for this very interesting comment. 🙂

  • @henryrroland
    @henryrroland ปีที่แล้ว +1

    Where this (2a+b)/3 came from? I never saw it before... I thought that average was (a+b)/2
    Why it can't find this representative R equaling the volume of a sphere and an ellipsoid? (We do that in irregular particles, like in bulk catalyst description)
    4πabc/3 = 4πr³/3

    • @MichelvanBiezen
      @MichelvanBiezen  ปีที่แล้ว +1

      With an ellipse, the slope changes and the change of the slope is not a constant. To have a better approximation of the average orbital radius when the shape is an ellipse, it is better to use (2a+b)/3 (We are not trying to find the average value of 2 numbers a and b)

  • @nurullahgurcan7396
    @nurullahgurcan7396 ปีที่แล้ว +2

    how can I find the rest of this lecture

    • @MichelvanBiezen
      @MichelvanBiezen  ปีที่แล้ว +2

      We are still working on them. We publish one new video on GPS every Thursday.

  • @LHVMleodragonlamb
    @LHVMleodragonlamb ปีที่แล้ว +1

    ellipsoid makes me think of a mexican food product that can be rebranded to get cohesion in west coast. like pinata. theyre called huaraches and it is a dense corn paste that provides calcium sodium and carbs.

    • @MichelvanBiezen
      @MichelvanBiezen  ปีที่แล้ว +1

      Never saw that connection !

    • @LHVMleodragonlamb
      @LHVMleodragonlamb ปีที่แล้ว +1

      money opp like automating robots w blood stabilizing food pastes

  • @Falit_
    @Falit_ ปีที่แล้ว +1

    nice lectures professor

    • @MichelvanBiezen
      @MichelvanBiezen  ปีที่แล้ว +1

      Thank you. Glad you enjoyed it. 🙂

  • @dlrmfemilianolako8
    @dlrmfemilianolako8 ปีที่แล้ว +1

    Thanks professor