GPS Navigational System

The GPS navigational system is the only Global Navigational Satellite System that is completely functional in the world today. This technology was first created by the American military for their own use, but it was decided to open the technology and satellite access to civilians and the general public as a useful navigational tool. The GPS navigational system works because of at least twenty four satellites that orbit the Earth in a precise configuration. These satellites transmit microwave signals which are very precise, and contain very specific information about the time and location of the satellite. The group of satellites is the responsibility of the 50th Space Wing of the United States Air Force, and they cost around seven hundred and fifty million dollars annually to maintain and replace the satellites, as well as necessary research and development. The government does not charge any money to use the GPS system, calling the use a public good, however a receiver is necessary and these generally do cost money. A GPS receiver is one element of the GPS navigational system, and these are made by several manufacturers at various prices, depending on the particular model, make, design, and features available. At least three satellite's signals must be received before the location of the GPS receiver can be triangulated, and this will greatly reduce any errors or miscalculations. Certain conditions and factors will interfere with the signal transmissions, causing delays, errors, or no data at all. These conditions can include tall buildings, thick foliage, large rocks, electrical interference, and other factors which can reflect the signal off of the intended path. Even considering this fact, the GPS navigational system is very accurate more than ninety nine percent of the time. The GPS technology has many benefits and uses, but one of the biggest is navigation, and it is used for this purpose all over the world.