VLF, A new Ebaut chance for everyone: f = 8270.100000 Hz Start time: 6.Apr.2017 18:00:00 UTC Symbol period: 30 s Characters: 5 CRC bits: 16 Coding 16K21A Duration: 8h, 48m Antenna current: 700 mA 7
...the start time was delayed to 18:35 UTC... 73, Stefan Am 06.04.2017 17:40, schrieb DK7FC: VLF, A new Ebaut chance for everyone: f = 8270.100000 Hz Start time: 6.Apr.2017 18:00:00 UTC Symbol peri
Hi Paul, Many thanks! However something went wrong again, the safety function was triggered after about 3 hours! So just 1/3 of the symbols were transmitted. Anyway a big Eb/N0 on your side, excellen
Well the signal was plenty strong enough during those three hours to make up for the 50% error rate after the transmit cut off. The interleaving is doing its job - here's the error map http://abelian
This evening, another transmission starts. Same parameters... Let's see if the coil survives. It seems to have to do with the higher ambient temperature. I disabled the ALC now, so the antenna curren
My EbNaut was up and running in time to produce a file, when it didn't decode, I was frustrated. Ready for the next one. 73 Eddie G3ZJO Many thanks! However something went wrong again, the safety fun
Good decode in QTH Warsaw/Poland from the 20170406 18:35 transmission, message sent to Stefan for confirmation. found rank 4688 ber 4.3655e-01 Eb/N0 -3.2 M -1.524679899e+00 [XX+YY] ps [ 0 0 0 0 0] ca
The 20170407 18:00 transmission didn't end yet, but Stefan's signal is strong enough to decode anyway (message sent to Stefan for confirmation). This is from 3 hours 18:00-21:10: found rank 311 ber 7
A super signal: carrier Eb/N0: 19.5 dB carrier S/N: 34.02 dB in 31.6 uHz BER only 3.1% It was not a very noisy night. Error map is extraordinary, no errors at all after midnight http://abelian.org/vl
Phew !! Very nice decode in UK IO92ng16. Sent direct to the instigator for confirmation. found xxxxx list rank 0 reference phase 180 180 180 180 carrier RMS 4.585e-005 noise RMS 6.622e-006 carrie
This is the decode from the whole transmission, Eb/N0 7.2: found rank 0 ber 2.9830e-01 Eb/N0 7.2 M -3.123538971e+00 [XXXXX] ps [ 16 0 0 -30 -30] carrier phase: 2.3 carrier Eb/N0: 7.1 carrier S/N: 21.
With this signal from Stefan I could have received 410 characters in the same duration... enough to list all the cats in the street. I'm sure this will decode far and wide. -- Paul Nicholson --
The EbNaut message was decoded at the DL0AO club station near Amberg (JN59VK), where a group around DK1IS and DF9RB are currently in the process of setting up a remote VLF receive system. Interesting
Hello Paul, Jacek, Eddie, Markus, VLF Thanks for the nice message decodes. It looks lkke it was a good night I'm optmiistic that Alex will decode it was well... Paul, if you could release a new ebnau
Thanks for the nice message decodes. It looks lkke it was a good night :-) actually i've tried to decode 3 hour segments from 18:00, 19:00 and 20:00. the 3-hour transmission from 18:00 decodes fine,
A little noisier last night carrier Eb/N0: 0.8 dB carrier S/N: 27.64 dB in 38.9 uHz constant reference phase Copied "INVITATION TO ALL OMS TO JOIN IN THE VLF ACTIVITES BELOW 9 KHZ. 73 DE DK7FC IN JN4
I was thinking just the same thing recently. When you look back, VLF has come a long way in the last seven years. Here is the first sign of an amateur VLF signal received at Todmorden, 15th March 201
VLF, After some time, there will be another EbNaut transmission tonite: f = 8270.100000 Hz Start time: 22.May.2017 20:00:00 UTC Symbol period: 20 s Characters: 12 CRC bits: 3 Coding 16K21A Duration
