Accordingly FSK441 used high speed data transfers as well. The high speed Morse was needed because of the short duration of the meteor trails that would support communication.
The aim of FSK441 was to replace the very high speed Morse that was a feature of meteor scatter operation. FSK441: FSK441 was the first version of WSJT to be developed and it was introduced in 2001.In view of the take up of WSJT, a number of variants optimised for particular bands and applications have been developed. The mode is very versatile in terms of its performance and it can decode steady state signals as well as short bursts from short lived meteor trails. WSJT was developed for 2 metre and 6 metre meteor scatter but now its use has spread far more widely and its low signal properties have been used to good advantage. WSJT was originally developed by K1JT around 2000 / 2001 but now the software is open source and its development is continuing under the management of a small team of radio amateurs. WSJT, Weak Signal communication by K1JT is a form of digital communication mode optimised for weak signal amateur radio communication. What is WSJT WSJT, invented by K1JT is a weak signal digital mode developed for amateur radio applications like meteor scatter, EME and HF long haul (using FT8) communicationsĪmateur Radio Digital Modes Tutorial Includes:ĭigimodes summary AMTOR RTTY PSK31 Packet radio PACTOR WSJT WSPR
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