There are 24 satellites in the GPS system and they are orbiting the Earth at about 20,000 kilometres above us. The satellites are travelling at about 11,000 kilometres per hour. Small rocket boosters ...

But what exactly is GPS, and how does it know where you are? Read more: 12 Smart Gadgets You Didn't Know Existed GPS means Global Positioning System ... services could work on the same phone ...

a tool that blends satellite navigation and digital monitoring to offer innovative solutions in animal science, among other fields. But what exactly is a GPS fence, and how does ...

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.