- Control stations on the Earth receive signals from satellites in orbit in space. The position of the satellites is then used to provide accurate information to personal GPS tracking devices anywhere on the Earth. GPS devices used by the public for directional purposes may give incorrect data (old street names, closed roads) because there is out-of-date mapping software within the device.
- The GPS system was developed by the U.S. military. General access to GPS was made available for civilian use, which has increased recently due to lower costs and more varieties of GPS devices available in the retail sector.
- There are 2 services provided by the GPS. The Standard Positioning Service (SPS) is used by the general population; the Precise Positioning Service (PPS) is used by the U.S. Department of Defense strictly for secret military operations.
- A personal GPS tracking device, whether it's mounted in the car or used through an iPhone, can be helpful with something as simple as how to get to the nearest pizza restaurant and how to get to a hotel after making a wrong turn. Its value is in saving the GPS user time and eliminating frustration.
- The use of the GPS is critical because it helps scientists and geologists analyze plate movement during an earthquake and, in the future, could be instrumental in helping to predict them. Meteorologists use the GPS system to accurately report a weather forecast and track the movement of storms or severe weather.
- GPS systems can be used to track the location of a family member or child. Businesses use GPS systems for directional purposes, as well as the ability to locate workers and packages. Police can use GPS systems to track offenders. Other industries that use GPS devices include aviation, maritime, trucking, surveying and emergency services.
