Re: LF: OPDS32, first Europe to South America

["Alan Melia" <alan.melia@btinternet.com>]

Hi Stefan
> which again confirms that this path is less (not?) affected by solar 
> activity. Same as on the path to VK..
I wouldnt quite say that :-))  the Dst was rising rapidly and was 
nearer -30nT over that period. The YV route my be a little as 3 hops with a 
couple of "salt water bounces", as Markus says you nearly made in the 
previous night at a Dst of probably around or slightly above -60nT. By 
comparison the VK route is probably at least 5 hops so you are looking at 
25dB more.....certainly need a little wind behind you :-)) but there may be 
more opportunities than just at the equinox, though the darkness period is 
most advantageous then.
Unfortunately Dst doesnt predict a good result, rather the better 
probability a result. There are a confusingly wide range of results even on 
a high Dst night.
Well done on these tests! It certainly is good to see marginal conditions 
probed, and a few "urban myths" tested :-))  The deep search has certainly 
enabled us to peep under the normal noise barrier and see what is actually 
possible in these paths. If you dont see anything you dont know whether the 
signal it is a couple of dB below detection or -100dB in other modes.
Alan
G3NYK


----- Original Message ----- 
From: "Stefan Schäfer" <Stefan.Schaefer@iup.uni-heidelberg.de>
To: <rsgb_lf_group@blacksheep.org>
Sent: Monday, December 09, 2013 10:26 AM
Subject: Re: LF: OPDS32, first Europe to South America


Martin, LF,

Most amazing. There were even 7 decodes last night!!!

YV7MAE FK81BD Opera-32 correlation 
http://df6nm.bplaced.net/opera/opds.zip
   date      time   call   distance  frequency bandwidth  snr 
correlation
2013-12-09 05:58:12 DK7FC   7812km 137572.816Hz   4mHz -45.0dBOp 100% 18.8dB
2013-12-09 05:23:10 DK7FC   7812km 137572.811Hz   3mHz -41.6dBOp 100% 21.2dB
2013-12-09 04:48:09 DK7FC   7812km 137572.810Hz   3mHz -45.5dBOp 100% 18.7dB
2013-12-09 04:13:09 DK7FC   7812km 137572.808Hz   2mHz -49.2dBOp  87% 17.5dB
2013-12-09 03:03:07 DK7FC   7812km 137572.807Hz   3mHz -49.0dBOp 100% 17.7dB
2013-12-09 01:53:05 DK7FC   7812km 137572.805Hz   9mHz -48.3dBOp 100% 15.6dB
2013-12-09 00:22:45 DK7FC   7812km 137572.800Hz   8mHz -45.7dBOp 100% 17.0dB

This is the first night and all night before produced not even a single 
decode.
DST levels were arround -40 nT 
(http://lasp.colorado.edu/space_weather/dsttemerin/dsttemerin.html) which 
again confirms that this path is less (not?) affected by solar activity. 
Same as on the path to VK..
Thanks for the receive site in Venezuela!

73, Stefan/DK7FC


Am 09.12.2013 03:28, schrieb Maritn A. Echazarreta D.:
> Yesss Stefan!!!!
> Congrats again!!!
> 2013-12-09 01:53:05 DK7FC   7812km 137572.805Hz   9mHz -48.3dBOp 100% 
> 15.6dB
> 2013-12-09 00:22:45 DK7FC   7812km 137572.800Hz   8mHz -45.7dBOp 100% 
> 17.0dB
> YV7MAE
> Martin.
>
> 2013/12/8 Stefan Schäfer<Stefan.Schaefer@iup.uni-heidelberg.de>:
>
> > LF!
> >
> > Just a few minutes ago i saw the first decode of DK7FC on Martin's YV7MAE 
> > LF
> > OPDS monitor in FK81BD:
> > http://dl.dropboxusercontent.com/u/74746618/LF/YV7MAE_LF_Grabber_OPDS.html
> >
> > 2013-12-09 00:22:45 DK7FC 7812km 137572.800Hz 8mHz -45.7dBOp 100% 17.0dB
> >
> > I've manually updated the page each few minutes and hoped for a decode 
> > and
> > now here it is :-)
> >
> > Hope i can do it a few times more this night :-)
> >
> > This is the path:
> > https://dl.dropboxusercontent.com/u/19882028/LF/DK7FC_YV7MAE.png
> >
> > 73, Stefan/DK7FC

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