Sandbox:SITOR-B: Unterschied zwischen den Versionen
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The output should be: | The output should be: | ||
< | <blockquote><tt> | ||
ryryryryryryryryryryryryryryryryryryryryry | ryryryryryryryryryryryryryryryryryryryryry | ||
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ryryryryryryryryryryryryryryryryryryryryry | ryryryryryryryryryryryryryryryryryryryryry | ||
</ | </tt></blockquote> | ||
== Frequencies == | == Frequencies == | ||
Version vom 24. März 2018, 10:31 Uhr
SITOR-B is one of two modes of SITOR (Simplex Teletype Over Radio). NAVTEX and AMTOR-FEC/AMTOR-B uses the SITOR-B protocol. Based on CCIR 625
This mode is often used in broadcasts of navigational and other warnings from maritime stations. However, not all broadcasts are in English - for example, Istanbul Radio broadcasts in Turkish, while Olympia Radio may broadcast in Greek. This can confuse newcomers to think that their decoder is malfunctioning. See the frequencies section below for a website that lists some of these stations.
In addition, the Czech intelligence services, as well as the Egyptian diplomatic service has been known to use this mode.
Compared to SITOR-A, SITOR-B doesn't use ARQ (Automatic Repeat Request). Instead, it uses FEC (Forward Error Correction) by sending each character twice during transmission.
Sample
You may use this to fine tune your decoder:
<html5media>File:SITOR-B.mp3</html5media>
The output should be:
ryryryryryryryryryryryryryryryryryryryryry
the quick brown fox jumps over the lazy dog
0 9 8 7 6 5 4 3 2 1
ryryryryryryryryryryryryryryryryryryryryry
ZCZC UA69 132320 UTC JAN 12 MONDOLFO RADIO
COASTAL WARNING 012/12 JAN 12 SOUTHERN ADRIATIC SEA - LECCE. DAY 13-14 JANUARY 2012 FROM 07.00 GMT TO 23.00 GMT, WILL CARRY OUT WEAPONS FIRING IN TORRE VENERIONE BOUNDED BY THE FOLLOWING POINTS:
A) 40 25 31N - 18 15 30E B) 40 30 20N - 18 16 30E C) 40 29 25N - 18 19 03E D) 40 27 45N - 18 20 58E E) 40 25 55N - 18 22 28E F) 40 23 05N - 18 23 18E G) 40 23 54N - 18 17 30E.
SAILING, ANCHORAGE AND FISHING ARE PROHIBITED. NNNN
ryryryryryryryryryryryryryryryryryryryryry
Frequencies
- USCG HF SITOR broadcasts
- Worldwide HF Radio-Telex Broadcasts by William Hepburn
- Go to the very bottom of this page for additional links
- Shipcom LLC (stations WLO and KSM) have been known to send weather reports on 4214 and 8473 khz
Video Examples
Decoding Software
- Hobby Level Software
- CocoaModem (for Macs)
- MultiMode (for Macs)
- DSC Decoder
- Fldigi
- Frisnet NAVTEX Decoder
- JVComm32
- JNX
- Mscan
- MultiPSK
- SeaTTY
- Sigmira
- Sorcerer
- TrueTTY
- Yet Another NAVTEX Decoder (YAND) Scroll down to Downloads
- Professional Equipment/Software
- Go2decode
- Go2Monitor
- Hoka 300-32
- Krypto500
- PC-NAVTEX
- Wavecom W-Code
- Wavecom W-Spectra
- WinRadio Advanced Digital Suite
- WinRadio Universal FSK Decoder
- Zorns Lemma German