that makes the clock a bit easier to use. It sits on top of the Dekaclock and automatically sets the correct time using a GPS receiver. It also keeps track of the time displayed by the dekatrons ...

High-precision orbit and clock information is a basic requirement for precise positioning with Global Navigation Satellite Systems (GNSSs) such as the American GPS or the European Galileo. Satellite ...

A system that improves the accuracy of the GPS satellite navigation system. A satellite's positioning accuracy is impeded by errors in its clock and signal delays caused by atmospheric conditions.

For the case of the GPS, v is the speed of the radio wave from the satellite which is equal to the speed of light c, which is approximately: In both the satellite and the receiver there is a clock.