How Does a Handheld GPS Work?
What is GPS? The Global Positioning System (GPS) is the sole functioning satellite-based navigational system in operation. It is made up of a network of 2-3 dozen satellites. While the Russians, European Union, India, and China all have plans for competing systems, none are functional. What Does a Handheld GPS Do? A handheld GPS device is a navigation tool for pinpointing location. Many also have directional features for guiding a person to a particular place. They operate on the same principles as all other GPS-based devices. The device receives microwave signals from the orbiting satellites. These signals contain information about the time of transmission and the position of the satellite. The device analyzes these signals by using the travel time of the signals and positions of the transmitting satellites, and trilaterates its position. At least four signals are necessary for a good position lock using the GPS system. GPS Issues Commercial GPS devices that are available to the publi
