Hi VLF, My next transmission: f = 8270.1 Hz start 25.04.2016 22:10:02 coding 8K19A CRC 16 period 30 length 15 duration: 8 hours, 16 minutes The antenna current is about 240 mA. 73, Stefan
Sorry, there was a wrong setting. The message starts: 22:20:02 UTC. 73, Stefan PS: Attached a capture of the decode of my own signal received on the forest remote grabber stream. Am 25.04.2016 23:56,
Unfortunately, neither one of the 7 and 15 character messages has been successfully decoded here. Maybe only a couple of dB missing, I don't know. All the best, Markus --Ursprüngliche Mitteilung-- Vo
Copied no problem, with Eb/N0 = +0.9 dB using a constant reference phase. S/N: 19.69 dB in 33.6 uHz 'CQ DK7FC JN49IK' That's three out of three decoded. One day, perhaps I'll be able to reply to you
Hi VLF, The next transmission: f = 8270.1 Hz Start: 26.04.2016 19:30:02 UTC Coding 8K19A CRC 16 Period 60 Length 6 Duration: 9 hours, 20 minutes Antenne current: 240 mA Control monitor in 3.5 km dist
Hello Paul, VLF, Wonderful! A complete CQ call with locator. We're playing our games here it appears sometimes. But we have to remind ourselves that it's the 36km band! Actually not trivial at all! T
Yes I remember a time - a few years ago now - that VLF didn't go beyond the back yard, a time when there was talk of dreamers on the LF list and the sound of gauntlets hitting the floor. Did someone
Copied 'SPRING' at Eb/N0 = +1.5, almost constant reference phase: 180 180 150 150 Carrier S/N: 18.63 dB in 29.8 uHz In audio bandwidth: -60.6 dB after sferic blanking, About -80dB before blanking. He
The VLF noise last night was spectacularly high, which you can see if you look at the flux density spectrogram, http://abelian.org/vlf/fbins.shtml#p=1461772800&b=100&s=fd You have to scroll back to 1
Hi VLF, The next transmission: Start: 27.04.2016 22:00:02 UTC Period 80 Length 2 Duration: 8 hours, 10 minutes, 40 seconds All other parameters stay the same. 73, Stefan Am 26.04.2016 21:15, schrieb
I'm copying 'V3' with Eb/N0 = +2.0 dB. Reference phase: -30 0 -30 0 Carrier S/N: 10.86 dB in 34.0 uHz Lower noise last night, an average nighttime noise level. -- Paul Nicholson --
Hi VLF, The next one: Start: 28.04.2016 21:30:02 Period 30 Length 13 73, Stefan Am 28.04.2016 00:03, schrieb DK7FC: Hi VLF, The next transmission: Start: 27.04.2016 22:00:02 UTC Period 80 Length 2 Du
... and another one from Nuernberg: QRG 8270.1 Hz 5 characters, 20 second symbols, 8K19A Start 6:00:02, end 8:50:42 Best 73, Markus (DF6NM) --Ursprüngliche Mitteilung-- Von: DK7FC <selberdenken@poste
Copied 'DF6NM DK7FC K' Eb/N0 = +1.0 dB and the reference phase pattern -150 -150 180 180 Carrier S/N: 19.42 dB in 37.2 uHz That's 6 of 6 messages decoded. -- Paul Nicholson --
Hi Stefan, Paul, unfortunately Stefan's 13 character message did not decode here. No wonder though. Looking at yesterday... ...shows that Paul's SNR seems to be about 8 dB better then mine, despite a
The distance may actually be too short. For medium ranges, say 100km to 500km the phase and amplitude can vary wildly due to the number of competing modes (or rays if you prefer the ray model). When
Hi Paul, you may well be right about the short ranges. The most simple picture looks only at the geometric path difference groundwave and one-hop skywave. For 180 km distance and 74 km reflection hei
