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Re: LF: More EbNaut 137.777

To: [email protected]
Subject: Re: LF: More EbNaut 137.777
From: Paul Nicholson <[email protected]>
Date: Sun, 29 Nov 2015 13:46:58 +0000
In-reply-to: <CAA8k23Rrxfi8PRg4hy7XPh0X2wA39oqsy91=YR-MepHqCzAV7w@mail.gmail.com>
References: <[email protected]> <CAA8k23Rrxfi8PRg4hy7XPh0X2wA39oqsy91=YR-MepHqCzAV7w@mail.gmail.com>
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User-agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130106 Thunderbird/17.0.2
 VO1NA 2015-11-28/29 EbNaut 8K19A 2S 8C.
 No T sweep, assuming good clock.

 21:30  2.1 dB
 22:00  no decode
 22:30  no decode
 23:00  no decode
 23:30  no decode
 00:00  8.6 dB
 00:30  2.1 dB
 01:00  3.2 dB
 01:30 -0.2 dB
 02:00  no decode
 02:30  no decode
 03:00  5.6 dB
 03:30  no decode
 04:00  no decode
 04:30  no decode
 05:00  8.6 dB
 05:30  no decode
 06:00  rx off for battery charge

I took the 00:00 message and ran a cross-correlation with
a locally generated copy of the message

 http://abelian.org/vlf/tmp/151129a.gif

The correlation peaks at a delay of 27.5 mS.

Later I'll do the same with the messages that didn't
decode, perhaps to determine if there was a fault, or
the signal was just too weak.

--
Paul Nicholson
--

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