How do GPS devices work?
Satellites GPS devices vary widely in their design, features and intended uses. However, they all use the same basic operation to determine your location. What varies is how they apply your position to other functions. GPS (Global Positioning System) satellites orbit the Earth twice each day on a fixed orbital path. There are 24 individual GPS satellites in operation at any given time. Each satellite sends transmissions to Earth, which include satellite identification, location and time and date information. A GPS receiver captures the satellite transmissions and gauges the distance of each satellite by comparing the difference in the time the information was sent from the satellite and the time it was received. Since the speed of transmission is a constant (speed of light), the receiver is able to calculate exactly how far away the satellite is. Trilateration Knowing the distance to one satellite would not provide the user with very useful information. Essentially, you would know how
