GPS navigation or GPS receiver is an common thing today. But what is behind GPS navigation? Can we have any effect because of this fact?
The first GPS satellite was launched in 1978, under the direct command of the US military forces. Since then, more then three dozens satellites have been launched on Earth’s orbit, servicing not only military and aviation forces but individual private users worldwide. In the history of the Global Positioning System, more than just one GPS satellite has been lost during launches or afterwards. Some satellites were taken out of service, others required replacements for technical purposes, but what matters most is how the technology is applied in the performance of daily tasks. The decoding of the satellite signal is done by a GPS device or receiver that provides the exact geographical location according to three-dimensional coordinates.

Science has made such progress that GPS satellite navigation is now incorporated in the design of smartphones. People depend more and more on GPS orientation and problems may appear if replacements do not come for the orbiting satellites that will expire in a few years. For the moment, there are management and funding issues that impair the proper reconditioning of the GPS applications. The US Air Force is in charge of the entire GPS satellite structure, but according to a recent May 2009 report, there are economic difficulties to be overcome.

At present there are some 31 satellites in service and since only four are necessary to get a fix on the position, the average user will not feel a change if some of the orbiting devices fail to work. Sometimes information may get redundant as six up to eight satellites can get connected to a GPS receiver for the same tasks. But in the eventuality of no real time positioning with the GPS satellite structures, we’d have to start using maps all over again. The transportation systems, the maritime and military forces would be the most affected if the satellites are not reconditioned.

The European states are preparing the launch of an independent satellite navigation system in 2010 that would be an alternative to the American GPS satellite applications that are now most popular. There are other countries that have individual satellite navigation and here we can count India, China or Russia. Regardless of how things are sorted out in terms of administration, implementation and foreign policy at the global level, the average user should not be seriously troubled by the different modifications that may occur in the GPS satellite system. More and more people will in fact start using GPS devices for increased efficiency of navigation.

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