How Does Gps Work?

GPS offers a reliable form of location technology. While originally developed for military use, GPS is increasingly being used in technology used by everyday consumers. Some of the devices that use GPS technology include newer cellphones and vehicle navigation systems. GPS-enabled devices can provide accurate locations within meters of where the device is being used, and you can purchase these devices at stores like Hammacher Schlemmer and Bass Pro Shops.

The GPS System

GPS stands for Global Positioning System. This system includes 24 satellites that constantly orbit the earth. Since the satellites operate 24 hours a day, every day, excellent coverage is provided. GPS-enabled devices are able to receive the signals transmitted by the satellites.

How the Receivers Work

A device that uses GPS has a receiver that's built in. A comparison is made between the time kept on the GPS unit and the time code in the satellite signal to detect a location. A location can be found for the receiver if it's able to connect to at least three of the satellites. When a larger number of satellites are detected by the GPS receiver, the location will be more accurate.

Devices That Use GPS

Devices that use GPS technology include navigation systems like Magellan and Garmin, as well as many cellphones. These allow drivers to get more accurate directions to their destinations. GPS technology in cellphones allows law enforcement and EMS units to easily locate injured motorists who call 911.

By: Amanda Demers

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