Message-ID: <005901cdb513$6a2750e0$0501a8c0@xphd97xgq27nyf>
From: "mal hamilton" <g3kevmal@talktalk.net>
To: <rsgb_lf_group@blacksheep.org>
References: <508D2FFF.40700@princeton.edu> <508D3344.9050200@iup.uni-heidelberg.de>
Date: Sun, 28 Oct 2012 13:52:04 -0000
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Subject: Re: LF: Answers to some JT9 questions
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Stefan
Why is a mapping feature necessary when you can have a real time QSO and get
a direct report like most operators do on HF
What you are suggesting is a BEACON mode again and QSL via INTERNET. The
intention is a QSO mode and get away from Beacon mentality.


de g3kev

----- Original Message -----
From: "Stefan Schäfer" <Stefan.Schaefer@iup.uni-heidelberg.de>
To: <rsgb_lf_group@blacksheep.org>
Sent: Sunday, October 28, 2012 1:29 PM
Subject: Re: LF: Answers to some JT9 questions


> Hello Joe,
>
> Here you are, that's nice :-)
>
> Thanks for your work and development and quick updates of JT9 for LF/MF
> use! Certainly there will be impressive distances covered in JT9 during
> this winter season.
>
> The mapping feature as in WSPR is an important motivation i think, both
> for RX and the TX stations!
>
> I will now prepare for a JT9-30 transmission on 137.43 kHz, running this
> until tomorrow 6 UTC.
>
> 73! Stefan/DK7FC
>
> Am 28.10.2012 14:15, schrieb Joe Taylor:
> > GM/GA all,
> >
> > 1. Alberto/I2PHD and others have asked whether details of the JT9
> > protocol are described somewhere. At present the only full description
> > is the one implicitly contained in the source code, which is openly
> > available at http://developer.berlios.de/projects/wsjt/ . In due
> > course I will provide a summary document describing the source
> > encoding, error-control coding, interleaving and bit-ordering scheme,
> > and modulation details. (At this point it's possible that a few of
> > these things could still change, depending on user feedback.)
> >
> > 2. Roger/G3XBM and others asked whether a WSPRnet-like database might
> > be made available. Yes, this could be useful, and in principle WSPRnet
> > itself could accept reception reports from WSJT-X. I will give some
> > thought to adding such a feature, and I'll consider having WSJT-X
> > support standard WSPR-format messages such as "WA1ABC FN42 37". I
> > should mention, however, that the principal intent of JT9 and WSJT-X
> > is to enable 2-way QSOs at MF and LF, with very narrow bandwidths and
> > very weak signals. In the longer term, I do not wish that our MF/LF
> > frequencies will be used mostly for beacon-like transmissions.
> >
> > 3. WSJT-X will continue to evolve in coming weeks. The JT9 decoder is
> > not yet fully optimized, and other enhancements are in the works, as
> > well. Surely there will be bugs in the early program releases: bug
> > reports and requests for new features will be most welcome!
> >
> > -- 73, Joe, K1JT
>