Hi Markus, Group,
The LF and VLF signals are idling at the moment. The daytime TA receptions
are very interesting indeed. On the 19th, the wx grounded both aerials
but the VLF wire was raised again and the tower was tuned on LF.
As of 2015 today the LF carrier is disciplined against GPS to see
if these periodicities seen on the grabbers are quirks of the DOCXO
or have some heavenly origin.
Thanks Markus for the plots and summary. The daytime receptions and
the good s/n for 50 watts is encouraging. Lobbing 10^33 photons every
half hour is great fun when so many end up across the pond!
73
Joe VO1NA
On Sat, 22 Dec 2018, Markus Vester wrote:
Hi Joe,
the carrier on your frequency is nicely visible night and day. When the signal
is strong, some symmetrical sidebands become visible, are you still
modulating with 7 char EbNaut messages every other half hour?
I've placed my current autodecoder scripts here
http://df6nm.bplaced.net/VLF/fec_tests/ebnaut_autodecode_scripts.zip
but note that this setup is driven by opds and sort of specific to my LF
grabber. For Linux, you may want to start from the scripts which Domenico has
recently posted.
Best 73,
Markus (DF6NM)
-----Ursprüngliche Mitteilung-----
Von: jcraig <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Mo, 17. Dez 2018 22:53
Betreff: Re: LF: EbNaut 137.542 kHz
Hi Markus, Stefan EbNauters,
Thanks for the reports and autodetectors. The TX carrier is on
continuously at 50 watts with the excitation XOR phase inverted
by Paul's Ebkey.c on a raspi3.
There have been some daytime decodes recently.
Is the autodetect easy to set up? If not perhaps I'd best
review the advice from you and Stefan again.
73
Joe
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