RE: [wsjtgroup] WSJT Version 5.9
- Joe thanks for the latest version of WSJT! It is nice that you released it
before the NAHSMS Winter Contest which is just right around the corner!
It downloaded & installed here with no problems except for the slow dial-up
scenario... We have already worked one new initial XE1GRR this afternoon
using Version 5.9.0
> -----Original Message-----
> From: firstname.lastname@example.org [mailto:email@example.com] On
> Behalf Of Joe Taylor
> Sent: Wednesday, November 16, 2005 9:18 AM
> To: hsms@...; firstname.lastname@example.org; Moon-Net; Udo
> Langenohl - DK5YA
> Subject: [wsjtgroup] WSJT Version 5.9
> To: Users of WSJT
> From: Joe Taylor, K1JT
> Subject: WSJT 5.9.0
> Date: November 16, 2005
> I am pleased to announce that WSJT 5.9.0 is available for free download
> from the WSJT Home Page, http://pulsar.princeton.edu/~joe/K1JT. It
> should appear soon on the European mirror site, http://www.dk5ya.de, as
> well. This is a major upgrade, not a beta release. If you use WSJT,
> you should definitely upgrade to version 5.9.0.
> I believe that all reported bugs found in beta-release version 5.8.6
> have been fixed. In addition, WSJT 5.9.0 is better than previous
> versions in a number of significant ways. The JT65 decoder is
> significantly faster. You can double-click on the waterfall or on the
> "red line" to decode a transmission quickly at any selected DF. The
> range of DT values searched for proper synchronization has been doubled.
> Errors in soundcard sampling rates are corrected. New graphical
> information is provided for JT65 shorthand messages. Temporary add-on
> DXCC prefixes are accommodated. Tracking information for a radio source
> at specified RA and DEC (e.g., a pulsar or a deep space probe) is
> provided. New operational features designed for random and
> contest-style operation are available. The full source code for WSJT
> will soon be made available under the GNU General Public License
> (programmers, see more information below).
> A more complete description of enhancements to WSJT since version 5.8.6
> can be found at http://pulsar.princeton.edu/~joe/K1JT/UpdateHistory.txt.
> There are many program changes, so be sure to read this information
> carefully before trying to use WSJT 5.9.0!
> Of course there may be some new bugs, and perhaps I have overlooked an
> existing problem that you already know about. Please let me know if you
> find shortcomings in version 5.9.0, or if you have suggestions for
> further improvements.
> Sorry, I have not yet found time to implement EME Echo mode. When that
> is done, and when I have finished some further enhancements to the
> decoders, WSJT 6.0 will be born. With some luck, there may also be a
> new User's Guide at about that time.
> With best wishes,
> -- 73, Joe, K1JT
> Additional Information for Programmers
> WSJT versions 5.8+ are the result of a complete re-write of the user
> interface, timing control, and audio I/O portions of WSJT 4.9.8. My
> principal motivation for this major effort was to make the program
> multi-threaded, both for real-time operational convenience and for
> performance reasons. Another strong motivation was a desire to move
> the program away from its dependence on a proprietary compiler
> (Microsoft Visual Basic) and a single computer platform (Windows).
> The user interface of WSJT 5.8+ is written in Python -- an elegant,
> open, cross-platform language that has been a pleasure for me to
> learn. The remainder of the program is written mostly in Fortran,
> with some routines coded in C; much of that code has been carried over
> directly from WSJT 4.9.8.
> I plan soon to release the source code for WSJT under the GNU General
> Public License (GPL). To this end, I have separated out the one piece
> of proprietary code formerly in the program, the soft-decision Reed
> Solomon decoder licensed from CodeVector Technologies (CVT). A driver
> for this decoder, optimized for JT65, has been compiled to make a
> stand-alone executable KVASD.EXE that is now distributed as part of
> the WSJT installation package, but is not part of WSJT itself. With
> this approach I can honor all provisions of the CVT license, and at
> the same time release everything else as an open source program under
> the GPL.
> WSJT 5.9.0 includes an open source hard-decision Reed Solomon decoder
> based on code written by Phil Karn, KA9Q . WSJT uses this decoder
> automatically if the proprietary CVT decoder is unavailable. In such
> instances "deep search" decoding retains its full sensitivity, but
> fully general decoding independent of the callsign database is less
> sensitive by 2 or more dB, depending on signal fading characteristics.
> Separation of the program into two executable units is transparent to
> the user.
> WSJT 5.9.0 uses the following open source libraries, which are also
> available under the GPL:
> 1. FFTW, by Matteo Frigo and Steven Johnson, for computing Fourier
> 2. "Secret Rabbit Code" or "libsamplerate", by Erik de Castro, for
> accomplishing band-limited resampling of data
> 3. RS, by Phil Karn, KA9Q, for Reed Solomon encoding and
> hard-decision decoding.
> I hope that the open release of WSJT source code will encourage others
> to read and understand the code, get involved in improving WSJT, and
> perhaps porting it to other platforms. Versions of the CVT
> soft-decision decoder for Linux or Macintosh will be easy to compile
> and distribute, if there is demand for them.
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