SITOR

SITOR

SITOR ("si"mplex "t"eletype "o"ver "r"adio) is a transmission mode used to transmit textual messages akin to regular radioteletype (RTTY), but implements simple error correction.

Two modes of SITOR are used:
* SITOR-A which implements automatic repeat request (ARQ) -- sometimes called AMTOR
* SITOR-B which implements forward error correction (FEC) -- sometimes called NAVTEX

SITOR is used commonly on shortwave bands, where it is used to transmit maritime-related information such as weather forecasts and storm warnings. In the United States, it is regularly used by the United States Coast Guard.

SITOR has an aurally easy to identify idling pattern. Synchronization bursts are transmitted every second or so and last for slightly more than one second. Every few sync bursts, a Morse identifier of three letters is transmitted (for example NMO in Honolulu).

ee also

* PACTOR
* Shortwave
* Radioteletype
* PSK31
* MFSK

External links

* [http://www.ominous-valve.com/sitor.html Spectogram of SITOR-B idle pattern, with description]
* [http://weather.gov/om/marine/hfsitor.htm US Coast Guard SITOR schedules (NOAA)]
* [http://www.arrl.org/tis/info/digital.html "Digital Modes - AMTOR, Packet, RTTY, TCP/IP"] from ARRL


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  • SITOR — (simplex teletype over radio) est un mode de transmission de messages textuels, proche du radiotélétype basique, mais qui comprend un mécanisme de correction d erreur. Il existe deux versions de SITOR : SITOR A qui comprend un mécanisme de… …   Wikipédia en Français

  • Sitor Situmorang — (Harianboho, Sumatra du Nord, Indonésie, 2 octobre 1923), dont le vrai prénom est Raja Usu, est un journaliste et écrivain indonésien. Son père, Ompu Babiat Situmorang, était un compagnon de lutte de Sisingamangaraja XII, le dernier roi batak,… …   Wikipédia en Français

  • Sitor Situmorang — (* 21. Oktober 1924 in Harianboho, Kabupaten Tapanuli, Provinz Nord Sumatra) ist ein indonesischer Schriftsteller. Situmorang arbeitete 1943 in Singapur, 1950–1951 in Amsterdam, bis 1952 in Paris und studierte von 1956–1957 in Kalifornien. Später …   Deutsch Wikipedia

  • SITOR — Simplex Telex Over Radio Funkfernschreibverkehr in einer Richtung ( > Lexikon der Text und Datenkommunikation ) …   Acronyms

  • SITOR — Simplex Telex Over Radio Funkfernschreibverkehr in einer Richtung ( > Lexikon der Text und Datenkommunikation ) …   Acronyms von A bis Z

  • SITOR — • Simplex Teletype Over Radio …   Maritime acronyms and abbreviations

  • СИТÓР СИТУМОРÁНГ (Sitor Situmorang) — (Sitor Situmorang) (р. 1923), индонез. писатель. Пьесы в духе экзистенциализма (вошли в сб. Улица Мутиара , 1954); рассказы, стихи (сб ки Новый век , 1961, Карта путешествия , 1976). Мемуары (1981) …   Биографический словарь

  • Ситор Ситуморанг (Sitor Situmorang) — (р. 1923), индонезийский писатель. Пьесы в духе экзистенциализма (вошли в сборник «Улица Мутиара», 1954); рассказы, стихи (сборники «Новый век», 1961, «Карта путешествия», 1976). Мемуары (1981) …   Большой Энциклопедический словарь

  • AMTOR — SITOR SITOR (simplex teletype over radio) est un mode de transmission de messages textuels, proche du radiotélétype basique, mais qui comprend un mécanisme de correction d erreur. Il existe deux versions de SITOR : SITOR A qui comprend un… …   Wikipédia en Français

  • Navtex — A NAVTEX receiver prints an incoming message. NAVTEX (Navigational Telex) is an international automated medium frequency direct printing service for delivery of navigational and meteorological warnings and forecasts, as well as urgent marine… …   Wikipedia

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