This seems fun https://www.alternativephysics.org/book/GPSmythology.htm https://www.alternativephysics.org/book/GPSmythology.htm Why would the receaver need a

This seems fun https://www.alternativephysics.org/book/GPSmythology.htm https://www.alternativephysics.org/book/GPSmythology.htm Why would the receaver need a clock if they are comparing pulses from satelites. All the satelites are all up there.