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Re: VLF: Carrier on 8270.00709 Hz

from [Paul Nicholson] [Permanent Link][Original]
To: rsgb_lf_group@blacksheep.org
Subject: Re: VLF: Carrier on 8270.00709 Hz
From: Paul Nicholson <vlf0403@abelian.org>
Date: Mon, 28 Aug 2017 17:24:55 +0000
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Joe VO1NA wrote:

> Testing the coil amp and dds ... [24th]
> 8 uW.

> Off at ~1600 utc today. [27th]


 http://abelian.org/vlf/tmp/170828a.gif

That's two daytime signals, 25th and 26th 10:00 to 20:00,
combined coherently, bin width is 27.8 uHz.

S/N of the combined days is 16.0 dB.

Adding the two days non-coherently gives only 9 dB.

I couldn't get anything useful out of the nighttime signal.

I'll be glad when you get a GPS locked carrier, it's a bit
tricky coherently combining recordings when the frequency is
not known!

--
Paul Nicholson
--
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