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Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz

from [Paul Nicholson] [Permanent Link][Original]
To: [email protected]
Subject: Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz
From: Paul Nicholson <[email protected]>
Date: Wed, 12 Oct 2016 09:40:02 +0000
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Using the carrier on 6470.0025, I can see that the signal is
completely lost in the noise during the night.

Daytime S/N 06:00 to 18:00 UT is 21dB in 23uHz, which is
sufficient for, say, 15 chars with 20 second symbols using
16K25 for estimate Eb/N0 of +0.5 dB, duration 11:33:20.

Daytime signal averages about 0.05 fT or 15nV (about two
electrons on a 20pF antenna), nighttime looks similar as
far as I can tell through the noise.

We should try a daytime test.
--
Paul Nicholson
--
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