Oddbean new post about | logout
 Ever used Google Maps?

GPS tracking would be impossible without space satellites. What is your theory for how GPS works, given you don’t believe in satellites? 
 You ever seen them driving the car mapping out the streets. You ever thought about that.  
 Hard to tell if you are trolling or not. GPS requires triangulation, and you cannot triangulate with points on the surface of a sphere. This is basic stuff. 
 You have drivers driving Google cars, taking pictures every minute. Mapping out every city, every street, and you believe it's satellites still 
 GPS relies on an ECEF coordinate system. That stands for earth-centered-earth-fixed. It uses the geocentric WGS 84. 

It's brutal cognitive dissonance once you explore the topic. Everything assumes a stationary plane, and "satellites" don't need to be in 'space'.

https://m.primal.net/KnsC.png