All GPS is ground based, buoy based, or low aircraft based (in the air, but not in “space”)
LORAN technology was invented during WWII.
There are no satellites in “orbit.”
This “orbit” deception has been going on since the 1960s.
So is the earth flat or a sphere?
The earth is flat. Its shape is somewhat like that of a phonograph record resting on a table. I do not know how big the “table” is. For all I know, it could be a plane many times the surface area of the earth.
Water on the earth’s surface does not curve the 8 inches per mile squared that would be required to fit a 25,000 mile circumference globe. The lack of such alleged curve can be demonstrated with a laser. It can also be proven with a combination of direct observation (unaided eye) and a telescope.