and A good signal at Forest, VA, from the overnight transmission 9th/10th, via Mike Smith's VLF receiver at 37.35348N,79.19450W, near Lynchburg. Decoded 'T' with Eb/N0 = +1.5 dB, BER 42.5%, rank 9; S
Hello Paul, Mike, VLF, What an exciting achievement. My congrats to Mike for his sensitive well working VLF RX. I guess it is his best DX of a man made signal :-) Also big thanks to Paul, without his
Yes indeed and it is also the longest distance message decode at VLF. Mike has put a lot of work into his receiver and I'm very pleased to see this well-deserved success for him. He's thought about p
Good timing with that. Now Stefan is going to repeat a 3 character message each night, with exactly repeating timing and phase. This allows the signals to be added, to accumulate enough S/N for a dec
Am 10.12.2017 21:07, schrieb Paul Nicholson: PPPS, Stefan - what's your estimate of ERP at 17470 Hz? I'm going to have a play with LWPC, to see what field strengths might be like over various long pa
This is a most significant achievement. East to west is some 20dB harder than the other direction! could you give a short explanation? i don't really understand nonreciprocal propagation VY 73 Jacek
Fantastic job! Congratulations to all J Does it confirms the graphic already distributed in this list showing that the best bands for long distance should be around 15KHz ? (see attached) If so. A 17
I don't either, really. The ionospheric reflection coefficient depends on the direction of the radio wave relative to the Earth's magnetic field. The wave accelerates free electrons in the plasma, an
With reference to the propagation charts, perhaps one of our Swedish friends could arrange to borrow the SAQ antenna system from time to time? John F5VLF
I have developmental authorization for 15.8 kHz, which is right at the best spot. This frequency range was used for the horizontal for the old CRT TV sets. These are mostly gone now. I would think it
Hi Markus, Am 10.12.2017 22:04, schrieb Markus Vester: PS: Secretly in my heart I'm hoping that one fine day we might receive a 17 kHz amateur allocation... Good point. How could we arrange this? Som
Am 10.12.2017 21:07, schrieb Paul Nicholson: Yes indeed and it is also the longest distance message decode at VLF. Oh, nice! :-) Mike has put a lot of work into his receiver and I'm very pleased to s
... 3 transmissions are completed now. Is there a decode? Or how much is missing? Any infos about the daily phase and Eb/N0, Paul? Fortunately the DL0AO grabber is back. Thanks to the crew! On the 42
So far: 2017-12-10/11 Eb/N0 = -13.1 dB (very noisy night) 2017-12-11/12 Eb/N0 = -6.3 dB, phase 125.3 2017-12-12/13 Eb/N0 = -6.8 dB, phase 143.2 The phase is repeating well enough, when the signal is
Thanks Paul, that was fast. Am 07.12.2017 19:09, schrieb Paul Nicholson: Correlates at Eb/N0 = -4.8 dB at Forest, -37.30 dB in 1Hz. That must have been a quiet night then. So all these 3 days are qui
...4 transmissions completed. Unfortunately last night the transmission was aborted at 03:40 UTC due to an incorrect setting of the safety limit. So this transmission is of limited use. It would be i
Nothing useful received today at Forest. Eb/N0 measures -19.6 dB which is just background. It didn't appear to be a particularly noisy night. This band seems to be quite variable. -- Paul Nicholson -
