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Re: VLF: Next message attempt to RC4HAA

To: [email protected]
Subject: Re: VLF: Next message attempt to RC4HAA
From: DK7FC <[email protected]>
Date: Fri, 24 Nov 2017 13:39:14 +0100
Cc: Андрей Климов <[email protected]>
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Today, after 4 nightly transmissions, my 5 character EbNaut message was decoded on the RC4HAA RX site. That's the new longest message over the 2877 km distant land path.

The four files generated by SpecLab were weighted and stacked. When using the recommended list length, a few false messages appear along with the correct one. However the correct one is clearly shown as the strongest one. See attachments.
If someone wants to reprocess the result, here are the files:

Now i will leave 8270 Hz for some time and leave the place for VO1NA. Ready for EbNaut reception here.

73, Stefan

Am 20.11.2017 14:32, schrieb DK7FC:
Hi VLF friends,

Here is a last attempt for an EbNaut DX detection on the 36 km band. I will leave the band for some weeks then, leaving the place for VO1NA..
Within 4...5 days the following 5 character message should decode over the long land path:

f = 8270.1000 Hz
Start time: 20.Nov.2017  15:30:00 UTC (daily, 4...5 days expected)
Symbol period: 45 s
Characters: 5
CRC bits: 16
Coding 16K21A
Duration: 13:12 [hh:mm]
Antenna current: 650 mA

73, Stefan

BTW: Thanks to the crew of RC4HAA to provide the receiver and computer and to produce VLF spectrograms and SpecLab txt files for EbNaut detections on the 36 km band!

Attachment: RC4HAA_8270Hz_5characters.png
Description: PNG image

Attachment: sum50_20212223-log.txt
Description: Text document

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