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

To: [email protected]
Subject: Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz
From: Paul Nicholson <[email protected]>
Date: Sun, 8 May 2016 19:18:56 +0000
In-reply-to: <[email protected]>
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> There was another carrier from 09:45...19:45 UTC today [7th]
> on 6470 Hz.

Thanks, that was useful against the low daytime noise.

I'm having fun with the H field rx, it's not working so
well at 6.47 compared with 8.27.  E field is doing well.
At 8.27 usually H has the better S/N but not so at
6.47 I think because of the hum harmonics reducing
the blanker effectiveness.  The above carrier helps
with diagnostics.

> Start time: 07.05.2016   20:00:02 UTC
> Period: 100s
> Length: 19
> CRC 16
> Coding 8K19A

A problem with the E-field rx here may disrupt that.
Battery went flat today while I was out. Lost about
3 hours.   No a disaster, EbNaut can still recover
the message if the rest is received well enough.

It was a very noisy night last night and geomagnetic
disturbance this morning.  Maybe today and tonight will
make up for that.

--
Paul Nicholson
--


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