[Lowfer] QRSS STACKING SOFTWARE

[craig wasson]

I looked at the sample images for QRSS Stitcher and it seemed like it was
stitching them end to end, not on top of each other.  Is that how it works?

I have played with a software package called (I think) NDBfinder which would
attempt to synch up the repeating period of an NDB signal and then average
many seconds of data into one image.  I would think that would be the goal
of something like QRSS Stacker.

Of course it's easier to synch up NDBs, since they usually have a fixed
10-second period.  A QRSS signal would require some manual intervention to
get a rough synch, then the software could hopefully take over.

I have been wanting to try something like this for a while - up to now I've
been manually cutting multiple screen captures and pasting the fragments
into a single image file - stacking the images vertically, and sliding the
pieces left/right to try to get a "synch".   I've had some success if I had
a good idea of what I was looking for. If over a number of repetitions I get
a majority of the dits and dahs, without too many extraneous dits, I felt
pretty sure I had a valid signal capture.

Craig



On Tue, Sep 7, 2010 at 2:15 PM, Charlie , W5COV <cvest at cox.net> wrote:

> Recently , after Hans introduced his 30 meter MEPT kits at Dayton this year
> , QRSS has become quite popular with new people that have never used it
> before .
>
> Presently some of the really active members , have been experimenting with
> "stacking" QRSS screens . It does seem to show some promise in producing
> better displays of captures .
>
> Most people are doing exact 10 minute captures for their images to stack
> (overlay) on top of each other over a long period of time .
>
> It is just a new interesting tool that may also prove useful for us in our
> part 15 beacon operations .
>
> I have yet to experiment with it myself . However I have seen many of the
> results of stacking the images and plan to try it this season and see if we
> can't get another little bit of technology to dig a better looking capture
> out of the noise .
>
> I can not recommend a specific program as of yet , but here is a link to
> one that is being used successfully .
>
> http://swharden.com/vdlabs
>
> Please feel free to forward this information to other groups or people that
> may have an interest in it . I would also be interested in seeing any
> results from anyone that tries it for part 15 , part 5 , or the 600 meter
> project .
>
> Also if anyone tries it with a different mode , I would be interested in
> tips and results of that also  .
>
> Perhaps there is a better piece of software also , that someone more
> familiar with it than I , can recommend .
>
> Charlie , W5COV , WE2XXO , CV , LowFER Beacon
> ______________________________________________________________
> Lowfer mailing list
> Home: http://mailman.qth.net/mailman/listinfo/lowfer
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Lowfer at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>