Alpha (also called RSDN-20 ) is a Russian system for long range radio navigation. It works similar like the former Omega Navigation System in the VLF-range. The alpha system consists of three transmitters, which stand in the proximity of Novosibirsk, Krasnodar and Seyda. These transmitters radiate 3.6 seconds long signals on the frequencies 11.905 kHz, 12.649 kHz and 14.881 kHz. From the phase difference of the received signals the location can be determined. Radio navigation is the application of radio frequencies to determining a position on the earth. ... Omega is the name for the first truly global radionavigation system for aircraft operated by the United States of America in cooperation with six partner nations. ... Very low frequency or VLF refers to radio frequencies (RF) in the range of 3 to 30 kHz. ... Official website: http://www. ... 19th century photo depicting Kuban Cossacks obelisk in Krasnodar Krasnodar (Russian: ) is a city in Southern Russia on the Kuban River. ... The phase difference between two signals of the same frequency can be thought of as a delay or advance in the zero crossing of one signal with respect to another. ...

Similar like the masts used for the Omega Navigation System, the masts of Alpha must be, because of physical reasons, very tall. Unfortunately no data are available of their height. Omega is the name for the first truly global radionavigation system for aircraft operated by the United States of America in cooperation with six partner nations. ...

Transmitters

• Alpha transmitter Novosibirsk: (55°45′22″N, 84°26′52.4″E)
• Alpha transmitter Krasnodar: (45°24′18″N, 38°09′29″E)
• Alpha transmitter Khabarovsk: (50°04′24″N, 136°36′24″E)
• Alpha transmitter Revda: (68°02′8″N, 34°41′00″E)
• Alpha transmitter Seyda: (39°28′16″N, 62°43′07″E)

See also

• OMEGA, the Western counterpart of the Alpha Navigation System, no longer in use.
• LORAN, low frequency terrestrial radio navigation system, still in use.
• CHAYKA, the Russian counterpart of LORAN

Omega is the name for the first truly global radionavigation system for aircraft operated by the United States of America in cooperation with six partner nations. ... LORAN (LOng RAnge Navigation) is a terrestrial navigation system using low frequency radio transmitters that use the time interval between radio signals received from three or more stations to determine the position of a ship or aircraft. ... CHAYKA is a Russian radio navigation system, similar like LORAN-C. It is also run on 100 kHz and is described like LORAN-C by its GRI. There are 5 CHAYKA-chains in use. ...

External links

• http://www.vlf.it/alphatrond/alpha.htm