4uHz, a good result for equipment and propagation. We are struggling with the QRN. A crazy time of year to be doing this. Most days are quiet only between 04:00 and 12:00, just a few days recently of
I've been trying with this transmission, and your earlier tests too. Bandwidths down to 6.6 uHz. I've been trying combinations of days and nights and both. So far, not the faintest hint of signal. I
Nothing is visible, not even the beginning of a peak at 2970, down to bandwidths of 1.36 uHz. I continue to experiment with the settings of filters and sferic blanker. The noise floor is too high, av
So far nothing, not even in 0.6 uHz. But the noise level is much higher than it could be. Have to work on the filter and blanker settings. Will take some time but I suspect a detection is possible. I
Not yet. After some software alterations I've tried down to 1uHz bandwidth (about 10 days integration) but not the slightest trace. Noise floor down there is around 0.003 fT. Sferic blanker is worki
Your usual good signal here. Also today, looks like someone on 8270.000 this morning for a few hours. http://abelian.org/vlf/fbins.shtml#p=1475420400&b=080&s=sp -- Paul Nicholson --
I wondered if that 8270 Hz might be Uwe, the bearing was right but the signal much weaker than normal. Also some other traces of signal at 8270: 2016-09-18_16:50,+1h and maybe 2016-09-13_11:10,+30m,
It looks like this will not decode. I was expecting an easy decode - last time (20th May) we had +2.7 dB from 100 second symbols, so 140 seconds should have been easy. Oh well, perhaps more luck with
Progress: so far, a partial decode 'DK7FC4R,3ZSB35X' at Eb/N0 = -0.4 dB with a phase pattern of 120 90 90 60. I am branching out from there with some small frequency shifts and beam shifts. Just nee
Overnight, the decoder turned up 'DK7FC4273 U8Z ' at Eb/N0 = -1.1 dB with 40.1% BER. It is still running. This is a great challenge, the signal is about 18 dB in 6uHz, which is about -68dB in audio b
Using the carrier on 6470.0025, I can see that the signal is completely lost in the noise during the night. Daytime S/N 06:00 to 18:00 UT is 21dB in 23uHz, which is sufficient for, say, 15 chars with
No decode, just a false hit ' WV' at Eb/N0 = -0.7. Strange. According to carrier measurements this should be an easy decode at around +3db. More carrier measurements: night signal phase lags daytime
Well, so far no decode (as you guess). Strange, the signal should be strong enough. Although only two electrons the reception is good, no sign of interference problems. Now I am experimenting with yo
I have used the Trimble Thunderbolt with its fixed 10uS pulse. It worked (vlfrx-tools, M-Audio 192) but timing jitter improved after a pulse stretcher increased the width to 1mS. As Andy says, the 10
Ran a quick trial here. With the Trimble 10uS directly into an E-MU 0202 at 192k/sec I get 100nS std dev of the raw intervals. The timing system here uses smoothed intervals which reduces the jitter
Copied 'YES' at Eb/N0 = +5.7dB, BER = 35.6% Constant reference phase. Carrier S/N: 16.96 dB in 26.9 uHz. About -63dB in 2.5kHz bandwidth after sferic blanking. I was expecting around +6.5dB based on
