GPS is an acronym for global positioning system, a network of 24 to 32 satellites that orbit the earth twice every hour. As these satellites orbit, they emit time-encoded geographical signals as a beacon to any GPS device on earth that can see them. A GPS device then uses these signals to triangulate its position anywhere on the planet. The more satellites and signals a device can receive a signal from, the more accurate the location will be. We will get into more details about GPS triangulation and accuracy in Chapter 4, Spawning the Catch.
The following diagram shows a GPS device acquiring a signal from visible satellites on the network:
GPS Device tracking visible satellites
This is a list of terms we may come across when talking ...