The 20170504 transmission received in Warsaw: found rank 0 ber 3.2337e-01 Eb/N0 6.6 M -2.813181400e+00 [VLF] ps [ 0 0 0 0 0] carrier phase: 1.6 carrier Eb/N0: 6.9 carrier S/N: 19.23 dB in 34.0 uHz el
I think i've decoded the 06.May.2017 18:00:00 UTC 6470.1Hz transmission, but 2-bit crc passes multiple decodes, most probable message: found rank 1 ber 4.1912e-01 Eb/N0 -0.0 M -2.227154732e+00 [xx]
Am 08.05.2017 08:29, schrieb Jacek Lipkowski: i think i've decoded it, but 2-bit crc passes multiple decodes, most probably the message is R9: Sorry, both decodes are false. Did you correct the star
Hmm maybe you can build a RX loop and build a software cardioid to get some gain?! 8.27 kHz could be enough far away from the mains QRM... my antenna is in the middle of Warsaw. i live in an old soci
btw i've just had a 1.5 min signal at 75Hz, time is in UTC+2. probably local, but interesting anyway, i haven't seen anything similar. btw there's a faint 82Hz line there too. jacek It looks like ZEV
The 82Hz carrier is gone, yesterday when i looked at it there was a carrier on 88Hz , and today there is a carrier at 90.2Hz. Spectrograms here: https://klubnl.pl/wpr/en/index.php/2017/05/29/zevs-na-
now the signal went from 90Hz to 92Hz at 8:05 UTC, and disappeared at 8:11 UTC. i've added the spectrogam showing the change at the bottom of the page: https://klubnl.pl/wpr/en/index.php/2017/05/29/z
I don't see these 90Hz and 92Hz signals here this morning, 06:00 to 08:30 UT. Nothing in the range 87.5 to 92.5 Hz. then most probably it's intermodulation or it could also be a local signal (althou
Most probably copied the message on 20170603 3:00. I've cheated a bit with the -f9 option. The decode was sent to Stefan for confirmation, the message is really at the limit, so you could also call t
Hello, I'm posting the description of the decode, people which use the linux software will find it obvious, but maybe someone will find it interesting/helpful for his attemps. BTW I got Stefan's perm
found rank 2 ber 4.0000e-01 Eb/N0 2.0 M -9.469240904e-01 [xx] ps [ 0 0 0 0 0] carrier phase: 3.9 deg carrier Eb/N0: -1.1 dB carrier Es/N0: -17.98 dB carrier S/N: 9.50 dB in 29.8 uHz, -35.76 dB in 1Hz
Decoded the 20170607 message (message sent to Stefan for verification). btw this is not my longest message on 6470Hz, i've decoded the 7-character MARCONI message (normal decode published at the end
Thanks for the transmission Stefan. although this is easy decode, it can be used to optimise the receiver for longer messages. I've tried to process this using different vtblank -a and -t parameters,
Is there any improvement of the Neo-7M over the Neo-6M? [...] the neo-6m can generate up to 999Hz on the timepulse output. this is good for a 1pps timing source for vlfrx-tools (just shorten the tim
I had to call the vlfrx tools from /usr/local/bin into that script, otherwise nothing happened. at the begining of the script insert: export PATH=$PATH:/usr/local/bin you won't have to use the full p
