Re: LF: Likely match to YU7AR transmission

[MarkusVester@aol.com]

Dear Bob, Teo, Laurie and LF group,

yes, I definitely think that traces of YU7AR were seen by ZL2CA last night. The image overlay clearly shows a match between the narrow dashes on Bob's Argo and my own 21-milliHz capture of Teo's transmission (fat yellowish trace on vertically stretched noise) behind it.

Congratulations to both ! And best of luck, to Laurie and anyone else trying to break that record as soon as possible ;-).

73 de Markus, DF6NM

----- Original Message -----
From: MarkusVester@aol.com
To: vernall@xtra.co.nz
Cc: laurie@g3aqc.freeserve.co.uk ; yu7ar@pyrotherm.co.yu
Sent: Sunday, March 27, 2005 12:04 PM
Subject: Re: Argo pic


Dear Bob,

I tried to align our two screenshots, by first scaling (125%x,400%y) and cropping mine to your Argo borders, and then aligned them manually using iMerge by Jon Grove (www.geocities.com/jgroveuk/iMerge.html), originally made for stacking of CCD astro images.

To achieve the best fit to Teo's signal, I had to assume a time-delay of approx. 9 pixels (108 s), which would be expected due to the FFT processing delay: Argo shows the time when a signal appears on screen, whereas SpecLab tries to compensate for the delay. There would also have to be a frequency calibration difference of about 0.11 Hz beween us, yet unexplained.

I also tried to relate your image to Laurie's signal which would be closer in frequency, but couldn't find a match to his sequence. Another point is that the second DFCW frequency is missing.

So I guess it's time to congratulate - bells and all ;-)

73, and best of luck again for tomorrow's test
de Markus, DF6NM