How GPS Works

The use of (Global Positioning System) GPS is only for those who drive. However, it can not be denied, another major inhibiting factor is that GPS is still an expensive item for the community and some people do not know how to work with GPS. Most aviation systems use ordinary GPS devices in flight, except when landing and taking off, just like any other electronic device. The ban on the use of GPS is due to a safety issue, ie not wanting passengers to map their positions. In contrast, some flights also incorporate GPS into the flight entertainment system. With GPS observation, 3D position information, speed, and acceleration of the aircraft can be carefully determined. In addition, GPS can also be used as an aircraft navigation system at the time of survey with real time method DGPS (Differential Global Positioning System). Currently, the use of GPS has entered a crucial domain that is for the family, how to work? Only on

The GPS device receives signals from satellites and then performs calculations so that in general view we can know the position (in latitude and longitude), speed, and time. Besides that also additional information such as distance, and travel time. The position shown is a geodetic reference system WGS-84 and time is a reference USNO (U.S. Naval Observatory Time). Scientists developed a configuration for a GPS system that can reach globally by using at least 21 satellites on earth orbit medium (MEO). Initially, researchers argued that a geostationary (GEO) configuration is at 36,000 km. But this is disproved because that opinion means the satellites will require a stronger transmitter and more robust launching tools. In addition, GEO will provide a weaker range of polar regions. Even the preliminary test configuration shows that the launch planes are on a slope of 630. The 24 new GPS satellites are in Block II configuration and have been launched between 1989 and 1994.