Thanks Joe for fabulous software.
In WSJT, in wsjt.py, can you define "idWarn=-1" to stop the error message?
In WsjtMod/options.py can we default, that the sending callsign be always sent?
And, Downunder here, we use "/" to "attach" the report to the callsign as in:
VK7XX/26 VK2ZIW 26
VK7XX/R26 VK2ZIW
VK7XX/RRR VK2ZIW
VK7XX/73 VK2ZIW
Such that when a garbled message via MS is received, we can sort it out.
Lots - a - fun, on 6m, 0700 to 0800 local.
80 (more anodes than a 73)
Alan VK2ZIW
On Fri, 07 Aug 2015 16:28:19 -0400, Joe Taylor wrote
> Several people have asked for an update on development of the "Fast
> modes" in WSJT and WSJT-X. So here's a brief summary.
>
> First, a review of some relevant terms and motivations. It's
> convenient to think of the various WSJT protocols ("modes") in two groups:
>
> *Slow modes* -- JT4, JT9, JT65, and WSPR. These modes are designed
> for communication with extremely weak signals -- often too weak to
> be heard. Target propagation modes include EME and long-distance
> troposcatter on VHF-and-up bands, and QRP Dxing on the LF, MF, and
> HF bands. Relevant signal amplitudes are approximately constant
> over a minute and more, aside from so-called "libration fading" for
> EME. Transmit/receive sequences are 1 minute for JT4, JT9, and JT65,
> and 2 minutes for WSPR.
>
> *Fast modes* -- JTMS, FSK441, ISCAT, and JT6M -- and now also
> *FSK315*
> (implemented in WSJT) and *JT9E* through *JT9H* (implemented in WSJT-
> X). These modes are made for communication with rapidly varying
> signals: for example, meteor scatter, ionospheric scatter, airplane
> scatter, and scatter off the International Space Station. The
> decoders are designed take advantage of short enhancements of signal
> strength. T/R sequences are 30 seconds (or sometimes even shorter).
>
> Bill, ND0B, has implemented a trial version of FSK315 in WSJT.
> Think of this mode as FSK441 slowed down to 315 baud; the bandwidth
> is therefore narrow enough to make the mode legal in the "CW and
> data" portion of the 10 meter band. Bill and a few others have been
> experimenting with FSK315 and also ISCAT-A on 10 meters, under dead-
> band conditions, using meteors and ionospheric scatter propagation.
>
> I have implemented experimental submodes of the JT9 protocol in the
> program branch WSJT-X v1.6.1. As with JT4 and JT65, letters
> following the "JT9" designator indicate increased spacings between
> the FSK tones. Traditional JT9 (now also called JT9A) has tone
> spacing 1.736 Hz, so the signals used at HF and below have total
> bandwidth 9*1.736 = 15.6 Hz. The widest of the new submodes, JT9H,
> has tone spacing 200 Hz and therefore bandwidth 9*200 = 1800 Hz.
>
> When used with the standard 1-minute periods, the wide JT9 submodes
> should be useful for the same purposes as the wide JT4 submodes:
> microwave EME, for example, where libration fading can cause Doppler
> spreading of 100 Hz or more. Used in this way, all JT9 submodes are
> "slow" modes; they use 1-minute T/R periods and keying rate 1.736
> baud, and they send the full 85-symbol message protocol in 85/1.736
> = 48.96 s.
>
> Optionally, the wide JT9 submodes can now also use "fast" keying
> rates equal to their tone spacing. "Fast JT9H", for example, uses
> keying rate 200 baud, so the full message protocol is transmitted in
> 85/200 = 0.425
> s. The message is sent repeatedly for the full Tx period, in the
> same way as done for the other fast modes.
>
> The fast JT9 submodes should be very effective for meteors and
> ionoscatter propagation, especially on the 6 meter band.
> Sensitivity should be similar to ISCAT, or perhaps slightly better.
> Because JT9 includes strong forward error correction, decoding
> results are like those for all the slow modes: you should see
> messages exactly as they were transmitted, or nothing at all.
>
> Tests of the fast JT9 submodes are currently under way, with
> excellent results.
>
> -- 73, Joe, K1JT
>
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Alan
Man's greatest waste of time: Worshipping the wrong God.
Consider Jesus.
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