Global Positioning System Gps

Since 1960 GPS is developed by US Navy and US Air Force. In 1978 first satellite in spce. In 1983 the US government decided to open the system for civil usage. 1995: Full Operational Capability, FOC. In 2000 the formally integrated deterioration is disabled and within the exactness for civil users is increased from 100 m to 20m. On the other hand the EU is planning an alternative system. Galileo is the first project of the European Union and the ESA (European Space Agency) and a part of TEN (Trans-European Network). The financing is organized by both organisations.

All system specific devices and earth stations will have been created by 2005. In 2004 Galileo wants to start the prototypes. In 2007 all satellites for Galileo will be in orbit.

Space segment: - 24 satellites on 6 different orbits - angle of inclination 55 # - per orbit 4 satellites - flight altitude 20200 km control segment: - 5 worldwide spread earth stations for controlling und observing - Master Control Station in USA How does GPS work? ...