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Flat Earth Theory / Re: Using airline flight data.

« on: May 02, 2018, 05:25:56 AM »

I don't think anyone suggested that either.

I think the previous poster is suggesting that if you were standing on some place on Earth, and the Earth was magically whipped away into another dimension, leaving you in place, you can still determine where you are without reference to an Earth-based co-ordinates system.

You would still be at the same point in space, regardless of whether or not you had a globe under you to apply lat/long to.

You might have to refer to your position as "3 microseconds, X metres from GPS Sat A, 5 microseconds, Y metres from Sat B, and 7 microseconds, Z metres from Sat C, though.....

Hi again Tom, yes you are correct that lat/longs are positions on a globe in a globe model.
However, if you were to plot your position right now and my position right now and several other people and refer to their position using any units you like, let’s call them “W,X,Y&Z Bishops” a plot would show that the various locations are scattered around the bit of space we inhabit seem to form not a flat plane, but a globe.

That’s all, just another bit of evidence supporting the popular theory of an oblate spheroid world.

I’m not sure of your position with regards to the speed of light, the accuracy of which is crucial to the functioning of a GNSS system. If you do not agree with the physics around that subject, well, I can’t help with your education, it’s a bit technical.

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Flat Earth Theory / Re: Using airline flight data.

« on: April 29, 2018, 08:44:24 AM »

Yes you have yet to prove that known 3D locations of places show anything other than a round earth.  GPS gives us the location of the receiver regardless of the earth..  Is WGS 84 incorrect, if so why?

The coordinate system a GPS uses assumes that the coordinate points rest upon a sphere. The location of one coordinate point may be "accurate", but the distance between multiple coordinate points relies upon the Round Earth model, and is therefore in dispute in these conversations.

Hi Tom,

you exhibit amazing stamina in the the face of fairly black and white evidence, well done on that count!
The GPS and other satellite systems do not assume a position on a sphere. They simply calculate a number of arcs measured from the many space vehicles. Where they intersect is the position in space, altitude may also be calculated with say 4 or more signals. It just happens that they indicate the position of the receiving unit on a spherical planet.

I am a pilot and rely heavily on GPS nowadays, let me assure you that it is incredibly accurate. My life and my crews life depend on it!