Get directions, maps, and traffic for Prospect Park, PA. Check flight prices and hotel availability for your visit.
GPS satellites carry atomic clocks that provide extremely accurate time. The time information is placed in the codes broadcast by the satellite so that a receiver can continuously determine the time the signal was broadcast.
Satellites move in a path around the Earth called an orbit. Every satellite must have an orbital path (remember, satellites that travel into deep space to look at distant planets are not true satellites, they are in fact space probes), and the type of path it takes is determined by the physics involved. satellite's orbit works because of a balance between two forces. The orbit is a combination of the satellite's velocity-the speed it is travelling in a straight line-and the force of the Earth's gravitational pull on the satellite.