Alpha, also known as RSDN-20, is a Russian system for long range radio navigation. RSDN in Russian stands for Радиотехническая Система Дальней Навигации (radiotehnicheskaya Sistema Dal'ney Navigatsii), which translates to English as "radio-technical long-distance navigation system".
Control panel of soviet long range navigation system RSDN-20 A-723 on Tu-154B
Alpha was used to determine positions of aircraft, ships, and submarines (in underwater positions). The system was developed in parallel with U.S. Omega navigational system, and also works in VLF-range. Alpha coverage is up to 10,000 km from the master station, with a position error of 2.5 to 7 kilometres (2 to 4 mi).
The Alpha system consists of three transmitters, placed in the proximity of Novosibirsk, Krasnodar and Khabarovsk. Two other transmitters at Revda and Seyda are not currently operational As of 2010[update]. These transmitters radiate signals of 0.4 second duration, in a 3.6 second cycle, on the frequencies F1: 11.904761 kHz, F2: 12.648809 kHz and F3: 14.880952 kHz. A radio fix is taken by measuring the phase difference of the received signals.
Other alternative frequencies are F3p: 14.881091 kHz, F4: 12.090773 kHz, F5: 12.044270 kHz, F6: 12.500000 kHz, F7: 13.281250 kHz, F8: 15.625000 kHz, Fx: 12.700000 kHz.
Much like the antenna masts used for the U.S. Omega navigational system, the masts of Alpha must be very tall, for technical reasons. Unfortunately, no data are available for their height.
Some transmitters are being disabled as of January 2014. Several remain on the air as of November 2017.
OMEGA, the Western counterpart of Alpha, no longer in use.
LORAN, low frequency terrestrial radio navigation system, still in use in Europe as of 2015.
CHAYKA, the Russian counterpart of LORAN, but still in use as of 2014.
External links
Alpha frequencies and monitoring
February 12, 2023
alpha, navigation, alpha, also, known, rsdn, russian, system, long, range, radio, navigation, rsdn, russian, stands, Радиотехническая, Система, Дальней, Навигации, radiotehnicheskaya, sistema, navigatsii, which, translates, english, radio, technical, long, dis. Alpha also known as RSDN 20 is a Russian system for long range radio navigation RSDN in Russian stands for Radiotehnicheskaya Sistema Dalnej Navigacii radiotehnicheskaya Sistema Dal ney Navigatsii which translates to English as radio technical long distance navigation system Control panel of soviet long range navigation system RSDN 20 A 723 on Tu 154B This article does not cite any sources Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Alpha navigation news newspapers books scholar JSTOR May 2010 Learn how and when to remove this template message Alpha was used to determine positions of aircraft ships and submarines in underwater positions The system was developed in parallel with U S Omega navigational system and also works in VLF range Alpha coverage is up to 10 000 km from the master station with a position error of 2 5 to 7 kilometres 2 to 4 mi The Alpha system consists of three transmitters placed in the proximity of Novosibirsk Krasnodar and Khabarovsk Two other transmitters at Revda and Seyda are not currently operational As of 2010 update These transmitters radiate signals of 0 4 second duration in a 3 6 second cycle on the frequencies F1 11 904761 kHz F2 12 648809 kHz and F3 14 880952 kHz A radio fix is taken by measuring the phase difference of the received signals Other alternative frequencies are F3p 14 881091 kHz F4 12 090773 kHz F5 12 044270 kHz F6 12 500000 kHz F7 13 281250 kHz F8 15 625000 kHz Fx 12 700000 kHz Much like the antenna masts used for the U S Omega navigational system the masts of Alpha must be very tall for technical reasons Unfortunately no data are available for their height Some transmitters are being disabled as of January 2014 Several remain on the air as of November 2017 Transmitters EditAlpha transmitter Novosibirsk 55 45 22 N 84 26 52 4 E 55 75611 N 84 447889 E 55 75611 84 447889 Alpha transmitter Krasnodar 45 24 12 N 38 09 29 E 45 40333 N 38 15806 E 45 40333 38 15806 Alpha transmitter Khabarovsk 50 04 24 N 136 36 24 E 50 07333 N 136 60667 E 50 07333 136 60667 Alpha transmitter Revda 68 02 8 N 34 41 00 E 68 03556 N 34 68333 E 68 03556 34 68333 Alpha transmitter Seyda 39 28 11 18 N 62 43 9 36 E 39 4697722 N 62 7192667 E 39 4697722 62 7192667 See also EditOMEGA the Western counterpart of Alpha no longer in use LORAN low frequency terrestrial radio navigation system still in use in Europe as of 2015 CHAYKA the Russian counterpart of LORAN but still in use as of 2014 External links EditAlpha frequencies and monitoring History of Alpha system View of Novosibirsk Alpha station masts Retrieved from https en wikipedia org w index php title Alpha navigation amp oldid 1096495492, wikipedia, wiki, book, books, library,
