Hi ULF, Since 16:56 UTC i'm running 180 mA antenna current on (2970 + 7/(24*3600)) Hz, i.e. on 2970.000081 Hz With integer multiples of 1/(24*3600 sec), phase glitches at 0 UTC should be avoided (ho
Hi Paul, I'm curious, is there any sign of a peak since the beginning of my transmission? The average antenna current is higher than last time. On the spectrogram of Renato i see that the QRN on 2970
This evening after work, I will check. Right now the recording files are transferring onto my fast workstation so I can quickly try a range of settings. I'm happy to be looking at 2970 again, it is
...it could be interesting to separate the days from the nights. If we know when the phase changes from night to day and from day to night, you could add a phase offset to the daytime signal. A serie
So far, still not a trace here. Noise floor down to 0.007 fT in 1.6uHz (about 6 fT in 1Hz) after sferic blanking. Days, nights, days + nights, with various phase adjustments for night. Coherent and
Well, now perhaps a hint of a signal. Only 3 sigma so not much but is interesting because it's on the right frequency and only present in E/W loop and E-field. I gave up doing long narrow integration
Hi Paul, ULF, Sorry for my late reply. The transmission takes quite long, so there is no need to stress with my answer :-) Thanks for the overview of the signal received in Bielefeld. Quite strong an
I've been trying a range of settings. I reverted back to simple (daytime) options vtfilter -ath=5,bw=1 -h bp,f=3370,w=1000 | vtblank -a25 -d0 -t100 -v (using vtblank from the latest version v0.8 of v
Ok, this is 3.9 sigma http://abelian.org/vlf/tmp/170321b.gif It's there from about 11:00 to 22:00 but it doesn't resolve so well in any bandwidth narrower than about 50uHz. I'm going to start droppin
Here's the best I can do for tonight. Now at 4.4 sigma with http://abelian.org/vlf/tmp/170321c.gif S/N 12.8 dB in 55 uHz. I dropped out the 15th and 17th, each of these days make the sum worse. But d
Looks promising doesn't it? It can probably be improved: the blanker and filter settings are just a reasonable guess, not likely to be optimum. This apparent 14:00 to 19:00 'window' might just be bec
Hi Paul, ULF, Wow, just amazing! Can't we say we already made it? Isn't it extremely unlikely that this is something elso than my signal?? A first signal detection by amateurs on the 101 km band betw
Well I don't know. It would be an extraordinary achievement for your 2970 signal to reach this far. It needs a result that can stand up to scrutiny. I'd like to do some more work with it to get an un
Hi Paul, Interesting. Do you also use the noise normalisation function which proved to be useful in recent stackings on 5170 Hz? Still a few weeks before the 6 channel input soundcard for the Raspi a
Yes and it makes a small improvement to the 2970 peak. I won't be buying one until the first revision, after they've got the bugs worked out. It's a bit too pricey to take a gamble. -- Paul Nicholso
Geomagnetic K-index elevated March 21 through March 23, approximately 3 < Kp < 4 but higher in Europe with levels at Wingst and Niemegk varying by 50nT to 80nT at times during that period. Mentioning
