How Does a Map-Based GPS Car Navigation System Work?
GPS System A GPS receiver works through the use of GPS satellites. There are 24 satellites which orbit the earth, circling twice a day and transmitting signals. At least 4 satellites are visible at any one time. When a person uses their map-based car navigation system, the GPS receiver picks up the satellite signal and uses it to triangulate its location through trilateration. Each satellite will tell the receiver how far away the receiver is from the satellite. By picking up at least 3 satellites, the GPS receiver is able to pinpoint its exact location. GPS Map and Software A GPS Car navigation device, in addition to being a GPS receiver, is loaded with maps. Using the longitude and latitude coordinates that the receiver was able to get from the satellite signals, the map-based navigation system is now able to exactly place its location on a map. Now if the user wants to know how to get to a particular location, they just input the address into the navigation system and the system wil
