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Re: VLF: A 300 char message?

To: [email protected]
Subject: Re: VLF: A 300 char message?
From: DK7FC <[email protected]>
Date: Sun, 12 Nov 2017 13:23:44 +0100
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What a terrible rainy day here! Since several days there is no sun. The tree grabber shut down because the accus are quite empty! This didn't happen since more than 9 months now.
The 300 character message was recorded here from the VLF stream from the tree. The recording is incomplete due to the shut down but it is long enough to actually get a decode! :-)
I had to increase the FFT input size in the SpecLab instance which exports the FFT data for the EbNaut decoder because of the high bandwidth (167 mHz!! :-) ) of this transmission using 6 second symbols.

Obviously it is to optimistic to assume the message can be decoded without stacking.
The message will be repeated today starting 17:15 UTC, just like yesterday...

73, Stefan

Am 11.11.2017 18:12, schrieb DK7FC:
message start delayed by 15 minutes...

Am 11.11.2017 12:11, schrieb DK7FC:
tonite, another attempt:

f = 8270.1000 Hz
Start time: 11.November.2017  17:00:00 UTC
Symbol period: 6 s
Characters: 300
CRC bits: 16
Coding 4K19A
Duration: 12:13:36h
Antenna current: 630 mA

73, Stefan
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