The collective Global Positioning System (GPS) exchange cards was planned by the US Department of Defense, as a way to path one's strict situation everywhere in the global.
The GPS exchange cards consists of 24 direction satellites, which itinerary the celestial body at a height above sea level of thereabouts 12,000 miles. These satellites each orbit the world twice all 24 hours, and they are set up in such a way that they can direct signals to any situation on the planet, whether it be ground or sea, and no situation how lonely.
The 24 GPS satellites are unceasingly glad orienting data, which can be picked up by GPS Devices on the ground, and used to figure strict latitude and line of longitude coordinates. Depending on the implement that is used, this data can be exact to in a few meters.
Some GPS tendency likewise donate advanced features such as self-propelling function and detailed driving directions.
Despite the prevailing misconception that GPS-enabled devices are prohibitively expensive, and just handy in knowledge domain and territorial army operations, oodles of these efficacious gadgets are mainly designed with the customer in cognition. For example, GPS handhelds can be carried in the region of on one's pocket, and are extraordinarily practical for a amount of functions. Certain companies, together with Nextel GPS, have even begun group action GPS technology beside joint customer products specified as perambulating phones.