Velocity of GPS Satellites. Global Positioning System (GPS) satellites travel approximately 14,000 km/hour, relative to the Earth as a whole, as opposed to relative to a fixed point on its surface.The six orbits are tipped at 55° from the equator, with four satellites per orbit (see diagram).elocity Relative to the Earth. Relative to the Earth, GPS satellites orbit twice in a sidereal day, the length of time the stars (instead of the sun) take to return to the original position in the sky.