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Re: VLF: New experiments on 17.47 kHz planned...

To: [email protected]
Subject: Re: VLF: New experiments on 17.47 kHz planned...
From: DK7FC <[email protected]>
Date: Mon, 27 Aug 2018 20:38:15 +0200
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...something went wrong. The transmission stopped :-( I'm continuing with a carrier until 23 UTC. Another message attempt will start tomorrow.
73, Stefan

Am 27.08.2018 15:09, schrieb DK7FC:

After transmitting carriers for the last 5 days, there are 3 good days to stack, the others were noisy.
The resulting SNR via start time plot for different carrier length is attached. With some uncertainty we can say that these days the ideal start time for the path from DL to VK7 is 17:50 UTC and the message duration should be between 2.5...3 hours.

This evening i'm going to start an attempt for a 2 character EbNaut message. With some luck, just 2 days, i.e. 2 stacks will be enough to get a clear decode.

f = 17470.1000 Hz
Start time: 27.Aug.2018  17:50:00 UTC (daily)
Symbol period: 12 s
Characters: 2
CRC bits: 23
Coding 16K21A
Duration: 02:56 [hh:mm]
Antenna current: 1.2 A

73, Stefan
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