A GPS navigation ... unit may include AM/FM/HD and satellite radio as well as hands-free cellular. Earlier units included a CD player. In the mid-1990s, car navigation systems emerged, and by ...

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.

CR's experts share the pros and cons of built-in navigation systems, stand-alone GPS devices, and navigation apps By Benjamin ...

The network of satellites and incredibly sophisticated mobile technologies that power GPS navigation has become a ubiquitous part of modern life. Unlike many other modern innovations, GPS systems ...