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Encyclopedia > Omega (Navigation System)

Omega was the first truly global radionavigation system for aircraft operated by the United States of America.


Omega was initially planned in 1968, and was operational in 1971.


There were eight Omega stations Norway (A), Liberia (B), Hawaii (C), LaMoure, North Dakota (D), Réunion (E), Argentina (F), Australia (G) and Japan (H). The station in Australia was originally intended for New Zealand but was moved to Australia after protests from anti-war protestors.


Each Omega station transmitted a very low frequency signal which consisted of a pattern of four tones unique to the station that was repeated every ten seconds. Because of this and radionavigation principles, an accurate fix of the receiver's position could be calculated.


Due to the success of the Global Positioning System the use of Omega declined during the 1990s, to a point where the cost of operating Omega could no longer be justified. Omega was permanently terminated on September 30, 1997 and all stations ceased operation.


The LaMoure station is now used by the United States Navy as an extremely low frequency station for submarine communications.


External links

  • http://www.navcen.uscg.gov/omega/
  • http://webhome.idirect.com/~jproc/hyperbolic/omega.html

  Results from FactBites:
 
AC 91-70 Oceanic Operations, an Authoritative Guide to Oceanic Operations (09-06-94) (11808 words)
Navigation difficulties of this type are usually detected by a divergence between the navigation systems, a situation that often occurs gradually.
Omega is a radio navigation system that uses a worldwide network of VLF signals from eight ground-based transmitters.
Omega equipment operations should be closely analyzed to ensure that an unacceptable workload is not imposed upon the flightcrew by use of the Omega equipment in normal and abnormal operations.
Satellite navigation system (1204 words)
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.
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The best known satellite navigation system is the United States' Global Positioning System (GPS), and as of 2002 the GPS is the only fully functional satellite navigation system.
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