Re: VLF: 8270.000 Hz and forest VLF grabber preparations...

[DK7FC <selberdenken@posteo.de>]

Hi Uwe,

OK, i run various time offsets but there is no clear decode. Some decodes appeared but with 2 characters it could be wrong.
I've got one decode with the message "GT". Is that right? (Another message was "NI"...)
The SNR of your carrier was quite low here but not sure if it was on air for a long enough time for that 47uHz window. Probably not...
Capture attached.
I will try your next transmission tomorrow.

73, Stefan

Am 16.02.2016 09:26, schrieb uwe-jannsen@kabelmail.de:

carrier is on.
message:
start: 2016-02-16 09:00:00
same facts

73
Uwe/dj8wx

 

Von: DK7FC <selberdenken@posteo.de>
Gesendet: 15.02.2016 22:14
An: <rsgb_lf_group@blacksheep.org>
Betreff: Re: VLF: 8270.000 Hz and forest VLF grabber preparations...

 

Hi Uwe,

Thanks for the test. I will try... But the QRN is much higher now. Maybe it is helpful to repeat the test tomorrow starting 9 UT? If you can and like...

More news: I managed to run 2 soundcards on a Raspberry Pi 2B. They are streaming simultaneously. I will install this on the tree in the forest. So one is stereo and for the 2 MF loops, the other one will be mono and for VLF and will run on request or when there is plenty of energy reserve. I will try to install an actice E field antenna there. Experiments in the past have been very promising! So maybe i can get one or two dB SNR improvement...? It will be interesting to compare both locations...

73, Stefan

Am 15.02.2016 20:01, schrieb uwe-jannsen@kabelmail.de:

carrier is on since 1850utc.

message:
start 2016-02-15 19:30:00
duration 04:05:20.00
coding 8K19
period 40
16 bits redundancy check
chars 2
(bits 368).

vy 73