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Topic: European Geostationary Navigation Overlay System

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Satellite navigation system

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	Satellite navigation system Summary
		Satellite navigation systems 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 navigation system can effectively degrade the performance of smart bombs being used by other states using its satellite navigation system to that of gravity bombs, or even offset them from their targets in such a way as to render them useless.
	www.bookrags.com /Satellite_navigation_system (1818 words)

	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, 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.
	www.ebroadcast.com.au /lookup/encyclopedia/eg/EGNOS.html (85 words)

	About EGNOS and WAAS
		Simplified these systems are satellite supported Differential GPS (DGPS), whereby the correction signals that improve the accuracy of the GPS receivers are transmitted by satellite.
		The European Geostationary Navigation Overlay System (EGNOS) is operated by ESA (European Space Agency) and by EUROCONTROL the European Organization for the Security of Space Flight.
		EGNOS was developed by the European commission mainly for civilian air travel, but also with emphasis on agriclutural applications in order to provide higher accuracies in the localization of positions than is attainable through GPS and so to promote precision farming.
	www.environmental-studies.de /Precision_Farming/EGNOS_WAAS__E/3E.html (578 words)

	EGNOS (European Geostationary Navigation Overlay Service)
		A European satellite navigation system intended to augment the two operational military satellite navigation systems – the American GPS and the Russian GLONASS –; and make them suitable for safety-critical applications such as flying aircraft or navigating ships through narrow channels.
		EGNOS is a joint venture of ESA (European Space Agency), the European Commission, and the European Organisation for the Safety of Air Navigation.
		It is Europe's contribution to the first stage of a global navigation system, GNSS, and is a precursor to the Galileo satellite navigation system.
	www.daviddarling.info /encyclopedia/E/EGNOS.html (264 words)

	Navigation Systems (Site not responding. Last check: 2007-10-31)
		EGNOS (European Geostationary Navigation Overlay System) is a european programme destined to augment, with the aid of a dedicated ground infrastructure, the military navigation constellations GPS (USA) and GLONASS (Russian), to offer to the European civil aviation authorities the capacity of navigation with safety, integrity and very high precision.
		System development is proceeding satisfactorily, with a successful critical design review in May 2002.
		A political decision is in sight at European Union level.
	www.alcatel.com /space/programmes/nav/navsystems.htm (1132 words)

	European Space Agency: Definition and Links by Encyclopedian.com
		It is...Ireland joined the European Community in 1973, and hence ceased to be EFTA members.
		At about the same time in 1977 the European Space Agency selected 4 astronauts to fly the first Spacelab mission...In 1998 the European Space Agency formed a single astronaut corps of 18 by dissolving the...
		The precursor of the European Space Agency, ESRO[?] (European Space Research Organization) was established on March 20, 1964 per an agreement signed on June 14, 1962.
	www.encyclopedian.com /es/ESA.html (371 words)

	GPS - How Satellite Navigation Works
		Global navigation satellites continuously transmit time and distance information as they orbit the earth in a precise formation.
		On average, a satellite navigation receiver is accurate to within 15 meters.
		Each Thales Navigation receiver compensates for time differentials by comparing the time signals of several satellites and adjusting its calculations and its clock to match.
	doe.sd.gov /octa/ddn4learning/statewide/gps/sateworks.htm (745 words)

	Receivers key to Galileo success
		European industry is developing and supplying receivers for the in-orbit validation of the system.
		The main component of the mission is, of course, the satellite built by Surrey Satellite Systems Ltd in the United Kingdom.
		Septentrio was selected during tenders launched by ESA for various phases of its navigation programme and made the first receivers for EGNOS, the European Geostationary Navigation Overlay System that 'filters' GPS signals, providing an improved GPS-like signal and helping Europe to prepare for Galileo.
	www.physorg.com /news81094391.html (774 words)

	ESA - Navigation - Satellite navigation receiver uses EGNOS signals delivered via Internet
		Navigation receivers operating at or near ground level may experience difficulties receiving the EGNOS signal-in space, due to obstruction of the line-of-sight to the geostationary satellite broadcasting the correction signal.
		This drastically improves the navigation performance in situations with limited visibility of low elevation geostationary satellites, for example vehicles driving in urban areas.
		EGNOS is a joint project of ESA, the European Commission and Eurocontrol - the European Organisation for the Safety of Air Navigation.
	www.esa.int /esaNA/SEMW614J2FE_index_0.html (449 words)

	Articles - WAAS (Site not responding. Last check: 2007-10-31)
		The European Geostationary Navigation Overlay System (EGNOS) is the European parallel to this United States system.
		The Microwave Landing System (MLS), an effort that began in the 1980s, was intended to be a higher-precision replacement for the ILS, but was rapidly overshadowed by the far less-expensive (per aircraft) WAAS technology, and the FAA has since discontinued MLS capability throughout the United States.
		When a pilot files for "area navigation," or "RNAV" using GPS capability, he/she can bypass existing aviation navigation systems such as VHF omnidirectional range (VOR), TACAN and Non-directional beacon (NDB), and proceed directly from the departure point on his/her instrument departure termination point to the initial approach point for the approach to his/her destination.
	www.worldhammock.com /articles/WAAS (1242 words)

	Space-based positioning, navigation, and timing systems
		The primary system used throughout the world for space-based positioning, navigation, and timing is the Global Positioning System (GPS), a constellation of U.S. Government satellites providing continuous civil service free of direct user charges to an unlimited number of users for peaceful purposes.
		It is a regional system that uses a distributed network of reference stations for monitoring GPS, and a central processing facility for computing GPS integrity and differential correction information.
		The Galileo satellite navigation program is a joint initiative between the European Union and the European Space Agency to build and operate a 30-satellite constellation that provides similar capabilities to GPS, but as a commercially-operated, for-profit venture, not a public good.
	www.usembassy-mexico.gov /texts/et050112GPS.html (1781 words)

	RTD Info 25 - Galileo: the challenge of autonomy
		The European Union's Galileo project for a global navigation satellite system is crucial to European independence and competitiveness.
		This new navigation system for civil transport will be developed industrially with the Union's support and in close cooperation with the European Space Agency (ESA), which, by 2008, should have sent a constellation of some 24 GalileoSat satellites into medium Earth orbit.
		The initial GNSS (Global Navigation Satellite System) phase of Galileo is run by the European Tripartite Group (Commission, ESA and Eurocontrol(1)) and aims to develop and implement the EGNOS (European Geostationary Navigation Overlay Service) system by 2002.
	ec.europa.eu /research/rtdinfo/en/25/03.html (571 words)

	Navigation Satellites Space Technology Science
		s first step in satellite navigation as it prepares for Galileo, which will be the first civilian navigation system, with a constellation of 30 satellites.
		Euro satellite navigation takes to the skiesSilicon.com, UK - Jul 27, 2006Galileo will be Europe's own global navigation satellite system, made up of a constellation of 30 satellites (27 operational and three spares), which will...
		CMEs is key to the future of human activities in space, including the many activities in daily life that rely on communication and navigation satellites.
	www.iaswww.com /ODP/Science/Technology/Space/Satellites/Navigation (489 words)

	Navigation (Site not responding. Last check: 2007-10-31)
		Alcatel Space has long-standing experience in space-based navigation systems, as prime contractor for Egnos, as supplier of navigation payloads and the ground segment for the Japanese MTSAT program, and as a major player in Europe's planned Galileo program.
		EGNOS(European Geostationary Navigation Overlay System) is a european programme destined to augment, with the aid of a dedicated ground infrastructure, the military navigation constellations GPS (USA) and GLONASS (Russian), to offer to the European civil aviation authorities the capacity of navigation with safety and ver y high precision.
		The EGNOS system consists of : Broadcasting of a GPS type signal in the zone of Europe “augmented” with information of precision and integrity of the GPS/GLONASS constellations so that all the navigation receivers computes their position in a very precise manner and without risk of error.
	www.alcatel.com /space/satellites/navig_index.htm (713 words)

	EGNOS European Geostationary Navigation Overlay Service Receiver Terminal (ResearchIndex) (Site not responding. Last check: 2007-10-31)
		Abstract: 1 EGNOS the European complement to the GPS and GLONASS systems is operating navigation payloads flown on geostationary satellites.
		Its role is to augment the performance of the GPS and GLONASS systems by improving their service integrity and the accuracy of their measurements.
		These two systems were originally designed for military purposes and their services were subsequently offered to civilian users, but with deliberate performance downgrading in the case of GPS.
	citeseer.ist.psu.edu /458576.html (268 words)

	SSI - Programmes - Navigation (Site not responding. Last check: 2007-10-31)
		The GNSS programme is strategically important to Europe in terms of safety, independence, economic prosperity, promotion of industry, employment and quality of life.
		EGNOS has been conceived to enhance the existing global navigation and positioning service provided by the US GPS and Russian GLONASS satellites to the point where it can be used for safety critical applications, such as flying aircraft and navigation ships through narrow channels.
		EGNOS is a first step towards Galileo, a fully-comprehensive European global satellite navigation system.
	www.ssi.it /NAVIGA1.HTM (156 words)

	Thales Navigation :: Products and Solutions :: About Satellite Navigation :: Augmentation Systems (Site not responding. Last check: 2007-10-31)
		Satellite-Based Augmentation Systems (SBAS) are networks of ground relay stations and geostatic satellites designed to receive satellite navigation signals and transmit corrected time and distance measurements that greatly improve accuracy.
		Using these known values for distance, SBAS corrects satellite navigation signals for atmospheric delays, incorrect satellite positioning and poor geometry, sometimes caused by inline or close alignment of satellites, increasing accuracy in specific regions.
		System upgrades are being developed which will soon provide accuracy to well within one meter.
	www.thalesnavigation.com /en/products/aboutgps/augmentation.asp (500 words)

	Coordinates: A resource on positioning, navigation and beyond
		To bridge the gap between the coverage areas of EGNOS and MSAS and to facilitate seamless navigation to the aircraft from West-East and vice-versa, therefore GAGAN is a requirement.
		The core system will have 30 satellites and is likely to be available by 2008 as per the existing schedule.
		Shri Kannayan Ramalingam is the Chairman of Airport Authority of India (AAI) entrusted with, inter alia, the control and management of Indian air space providing communication, navigational and surveillance aids to air traffi c operating to and from Indian Airports, AAI manages 126 airports in the country.
	www.mycoordinates.org /k-ramlingam.php (1223 words)

	House of Commons - Transport - Written Evidence
		It was considered advisable to build a system to check GPS independently because the United States does not provide any guarantees of GPS performance to civilian users and disclaims responsibility for poor GPS performance over foreign countries.
		As regards later navigational applications, it will depend on the commercial acumen of British companies and in this respect it is regrettable that there are now no British companies left engaged in fundamental research and development of navigational systems, an area in which the UK once led the world.
		An indirect benefit to industry is that the type of engineering needed to design, build, launch and control navigation satellites is very advanced and new to this country and should trigger off increased activity in Universities and research institutes.
	www.parliament.the-stationery-office.co.uk /pa/cm200304/cmselect/cmtran/1210/1210we02.htm (1485 words)

	House of Commons - Transport - Written Evidence
		EGNOS (European Geostationary Navigation Overlay System), a collaboration between the European Commission (EC), the European Space Agency (ESA) and Eurocontrol, the air navigation safety organisation, provides an enhancement of the GPS system using three geostationary satellites and a network of ground stations to provide a wide area differential GPS service and integrity monitoring service.
		If the argument were limited to whether Galileo would provide a better or more accurate navigation system alone, then it would be unclear as to why Galileo is required when it has been proven over many years that GPS with EGNOS is available, robust, reliable and accurate.
		Satellite navigation and positioning has a wide range of industrial, scientific and commercial applications, some of which are already visible in everyday life, most notably in car navigation.
	www.parliament.the-stationery-office.co.uk /pa/cm200304/cmselect/cmtran/1210/1210we10.htm (1936 words)

	Galileo Industries - Tech Corner (Site not responding. Last check: 2007-10-31)
		The Galileo system as specified is the most demanding Global Navigation Satellite System in terms of performance requirements on integrity, continuity, and availability.
		Europe is therefore developing a regional augmentation system, know as the European Geostationary Navigation Overlay System (EGNOS), which will provide the performance required by demanding civil aviation users, as well as maritime, road and rail traffic.
		The Egnos system will be the first system able to improve GPS and Glonass performance throughout Europe.
	www.galileo-industries.net /galileo/galileo.nsf/pages/CONT-627F26?openDocument&e (471 words)

	ESA - Navigation - ESA Navigation Publication: EGNOS − The European Geostationary Navigation Overlay System − A ...
		EGNOS − The European Geostationary Navigation Overlay System − A Cornerstone of Galileo
		EGNOS is the first-generation European Global Navigation Satellite System (GNSS) designed to serve the needs of maritime, land transport, time and aeronautical applications in Europe and neighbouring regions.
		EGNOS is a joint programme of the European Space Agency, the European Commission and Eurocontrol.
	www.esa.int /esaNA/SEM4L7Q08ZE_index_2.html (434 words)

	Concord Marine News- WAAS Wide Area Augmentation System
		The ‘corrected’ differential messages are then broadcast through two Geostationary Earth Orbit (GEO) satellites on the same frequency as the GPS signal.
		Currently in the testing phase the EGNOS system is a joint project of the European Space Agency (ESA), the European Commission (EC), Eurocontrol, and the European Organisation for the Safety of Air Navigation.
		The EGNOS System Test Bed (ESTB) is currently underway and is expected produce a fully operation EGNOS system by 2004.
	www.concordelectronics.com /news-wide-area-augmentation-system.htm (286 words)

	IHS Aerospace - Industry Delivers European Geostationary Navigation Overlay Service For Review (Site not responding. Last check: 2007-10-31)
		A key step for European satellite navigation will be achieved in Toulouse this month with a technical review of the European Geostationary Navigation Overlay Service (EGNOS).
		EGNOS is a joint project of the ESA, the European Commission (EC) and Eurocontrol - the European Organization for the Safety of Air Navigation, and is Europe's contribution to the first stage of the global navigation satellite system (GNSS), paving the way for Galileo, the first civil, complete satellite navigation system.
		The focus will be on the functional qualification of the system and its operability, the stability of the system in its real environment, system-delivered performances and compliance to the requirements and safety- and product-assurance issues (including the software qualification), and the completeness of deliverables.
	aero.ihs.com /news-05Q2/european-geostationary-navigation-technical-review.jsp (883 words)

	Outback Guidance System from SOYL
		A. The European geostationary navigation overlay system (EGNOS) is a satellite navigation system.
		Satellite navigation systems use radio time signals transmitted by satellites to enable mobile receivers on the ground to determine their exact location.
		Due to the relatively clear line of site between the satellites and receivers on the ground, combined with ever-improving electronics, satellite navigation systems can measure location to accuracies in the order of a few metres in real time.
	www.soyl.co.uk /outback/outbackFAQ.htm (1305 words)

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