[Laser] Results from the Lunar Eclipse

[Chuck Hast]

On 9/2/07, F1AVYopto at aol.com <F1AVYopto at aol.com> wrote:
> >When moving the scope & PMT to the moon  in full eclipse, the light from the
> moon gave 20dB or more >increase in  overall noise.  The only discernable
> signals on Spectran with fairly short  integration were from >60, 120, 155Hz.
> The 60 and 120 were the same  level as off the moon, so I don't think they are
> moon >sourced.  The  155Hz also was something in my area, but not sure what.  I
> have a few 100's  of MB's of >WAV files if someone has some ideas on
> processing.
>
> Jim,
> I have seen your pictures and Spectran graphs with a great interest.
> The  signal to find must be at 100 Hz and 300 Hz and not at 50 Hz!
> The signal we  found is so weak that the Spectran parameters to detect the
> 120 Hz line are  extremely critical.
> It is very important to release the auto bright button  and to adjust
> manually brightness and contrast to display the weakest spectral  lines.
> It is also very important to use a smaller resolution to improve the
> sensitivity
> Less than 0,1 Hz resolution with a small average factor (4 is  good with
> average active) associated with a very low waterfall speed will allow  you to
> detect extremely weak signal.
> If you can send me small parts of your  files (you can cut a few significant
> 1 Mo recorded segments with Audacy or  WavePad programs) I will scan them
> carefully with my FFT tools.
> 73 QRO Yves
>
Though I am into high speed data links and whatnot, I am following this with
rapt attention, it is like a 'who dun it'. Late at night I set down and re-read
over all of your comments, this is science at it's best!!!

-- 
Chuck Hast  -- KP4DJT --
To paraphrase my flight instructor;
"the only dumb question is the one you DID NOT ask resulting in my going
out and having to identify your bits and pieces in the midst of torn
and twisted metal."