Who mentioned anything about FE GPS. I'm just curious about what would make it exclusive to a round earth. Supposedly that exclusivity is due to satellites. He is pointing out that there are usually two solutions with three transmitters - as you point out this is wrong because the addition of the fourth rules out the extraneous solution. Common sense can usually remove this fourth solution without an additional transmitter (knowledge of whether you are under ground and unable to use gps anyways.)
This is true on a flat earth or a round earth.
I'd like to know how he thinks it works on a round earth though, given his claim that there would be two solutions which would hold for a round earth or flat one.
For God's sake, when you have the distance from 3 satellites, there are two solutions: one is down on Earth, below the satellites, the other is up in space, above the satellites. GPS can tell elevation you are at with three satellites because it can safely assume you are below the satellites. If, however, the satellites are actually on the land, it can't assume that, and it cannot tell the elevation. The fact that GPS can accurately tell the elevation with data from three satellites severely discredits the idea that GPS satellites are actually down on Earth.
Besides, how come do the GPS devices that assume the satellites are moving give such accurate results if they aren't actually moving?
It's a good thing we don't only have three satellites, or we'd have an inaccurate position (on a round or a flat earth).
Can you back up your wild assertion that only three gps satellites exist? And that on both a round or a flat earth using three satellites does not lead to inaccurate results?
When did I say only three GPS satellites exist? I pointed out to the fact that, if a GPS receives signal from only three satellites, it can determine the elevation with precision of around 20 meters. That's not super-precise, but it's hard to explain if we assume it has to guess between two very different solutions. Honestly, you seem to be trolling.
And that with elevation is not remotely the only problem with the incoherent hypothesis that GPS is land-based. How come do GPS devices, programmed with open-source software to assume the satellites are moving at specific orbits, give remotely correct results if the satellites aren't actually moving? How come do the GPS devices get more correct results if they assume the time on the satellites runs a bit slower than it does on Earth due to relativistic effects of gravity?
The theory that the Earth is round provides us with interesting, useful and easily falsifiable explanations. The incoherent model that the Earth is flat provides us with nonsense technobabble and is struggling to give any explanation for what the theory that the Earth is round gives useful explanations for.