What is the Global Positioning System?
A – The Global Positioning System (GPS) is a series of satellites in earth orbit funded by and controlled by the US Department of Defense. It is available to civilian users world wide as well as the military. The system was designed for and is operated by the US military. An alternative but complementary system called Galileo is currently being built by the European Union and the European Space Agency and is planned to be operational in 2013.