Encyclopedia > European Geostationary Navigation Overlay System
The European geostationary navigation overlay system (EGNOS) is a satellite navigation system under development by the European Space Agency, the European Commission and EUROCONTROL. It is intended to supplement the GPS and GLONASS systems by reporting on the reliability and accuracy of the signals. According to specifications, horizontal position accuracy should be better than 7 meter. In practice, the horizontal position accuracy is at the meter level. It will consist of three geostationary satellites and a network of ground stations and was intended to be operational in June 2005, but due to delays the date has been pushed back to the first quarter of 2006. It is planned as a precursor to the Galileo positioning system. Satellite navigation systems use radio time signals transmitted by satellites to enable mobile receivers on the ground to determine their exact location. ... The European Space Agency (ESA; established 1975) is an inter-governmental organisation dedicated to exploration of space with currently 16 memberstates. ... The European Commission (formally the Commission of the European Communities) is the executive of the European Union. ... EUROCONTROL members EUROCONTROL is the European Organisation for the Safety of Air Navigation, an international organisation whose primary objective is the development of a seamless, pan-European Air Traffic Management (ATM) system. ... Over fifty GPS satellites such as this NAVSTAR have been launched since 1978. ... GLONASS (Russian ГЛОНАСС; ГЛОбальная НАвигационная Спутниковая Система; Globalnaya Navigatsionnaya Sputnikovaya Sistema. ... A geosynchronous satellite is a satellite whose orbital speed equals the Earths rotational speed. ... 27 satellites in orbit. ...
Similar service is provided in America by the Wide Area Augmentation System (WAAS) system. What is WAAS Wide Area Augmentation System WAAS is part of the FAAs plan to retire the existing use of VOR, NDB, ILS, and LOCALIZER aviation navigational systems. ...
Satellite navigationsystems allow small electronic devices to determine their location (Longitude, Latitude, and Altitude) in within a few metres using time signals transmitted along a line of sight by radio from satellites.
Satellite navigation receivers reduce errors by using combinations of signals from multiple satellites and multiple correlators, and then using techniques such as Kalman filtering to combine the noisy, partial, and constantly changing data into a single estimate for position, time, and velocity.
The same applies to the use of smart bombs: the operator of a satellite navigationsystem can effectively degrade the performance of smart bombs being used by other states using its satellite navigationsystem to that of gravity bombs, or even offset them from their targets in such a way as to render them useless.
The Europeangeostationarynavigationoverlaysystem (EGNOS) is a satellite navigationsystem under development by the European Space Agency, the European Commission and EUROCONTROL.
It is intended to supplement the GPS and GLONASSsystems by reporting on the reliability and accuracy of the signals, allowing position to be determined to within 2 metres.
It will consist of three geostationary satellites and a network of ground stations and is intended to be operational in 2004.
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