Message-ID: <508D3344.9050200@iup.uni-heidelberg.de>
Date: Sun, 28 Oct 2012 14:29:40 +0100
From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= <Stefan.Schaefer@iup.uni-heidelberg.de>
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Subject: Re: LF: Answers to some JT9 questions
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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