Message-ID: <001001bfab04$8a2eb940$06e11ac3@g4jnt>
From: "Andy Talbot" <drassew2@interalpha.co.uk>
To: rsgb_lf_group@blacksheep.org
Subject: LF: Re: re Dopplergrams on 137.790
Date: Thu, 20 Apr 2000 21:10:55 +0100
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I  have a new 'breadboard' programme running now that shows a real time
waterfall and spectrum display.  It is excrutiatingly painful to watch as
the display is only updated every 18 minutes !!   A definite carrier has
only just appeared exactly on frequency ( at 1930z ) now the sun has set, so
there is obviously a very predominantly skywave component with heavy daytime
absorbtion.

Sampling rate for this one is at 0.244 Hz as the frequency deviation is a
lot more than I initially thought it might be.

Better plots are produced by processing the stored raw data.  I'll let you
have copies when that is available, probably tomorrow or Saturday.

Andy  G4JNT


-----Original Message-----
From: Alan Melia <Alan.Melia@btinternet.com>
To: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Date: 20 April 2000 20:12
Subject: LF: re Dopplergrams on 137.790


>Hi Andy, I could copy a carrier at good strength on 137.990 on Spectran
last
>night. I
>didnt bother recording as there was no modulation. BUT there where two
other
>lines neaby which I think might be weak Loran lines ....these were much
>weaker than what I think was Marco's carrier. These lines where probably
>outside your 'slot' , they where about within 0.3 Hz and separated by about
>about 0.3 - 0.4 Hz. I will be interested to see your plots.
>
>Cheers de Alan G3NYK
>Alan.Melia@btinternet.com
>
>
>
>