Hi Paul, (i updated the subject title) Am 25.01.2017 19:30, schrieb Paul Nicholson: Decoded at Bielefeld via DL4YHF (303.8km). Copied 'DK7FC' with Eb/N0 +4.5 dB and constant reference phase. S/N 19.1
On the 26th there was stormy weather all day near Marseille, not exactly Heidelberg but it's a start. It's in the right quadrant but longer distance. (It made me think of Garlaban and I ended up read
Paul, Excellent diagnostic method and implementation. Thanks also for applying the method to the ULF experiments, and to 3kHz propagation in general. I dont remember seeing a measurement of the type
Hi Paul, Did you get some more improvements? From the known decoded EbNaut messages, what was the SNR at Renato or on your side? Your recent sferic analysis seems to state that no unexpected propagat
The method has some weaknesses Jim but in the absence of any artificial signals it's the best I can do. I must repeat the exercise when we next get a thunderstorm nearer to Heidelberg. Looking at the
Hi Paul, ULF, Am 29.01.2017 18:26, schrieb Paul Nicholson: Nothing detectable here or at Cumiana so I can't answer the question of how many days need stacking. Until there is some glimpse of a signal
PS: Renato is running a 4 uHz spectrogram at 2970 Hz, http://www.webalice.it/rromero/live_cumiana/last-LFtest_2970.jpg There is a faint trace during about the right time and on the right frequency, s
Stefan and Paul, I've been unable to find any empirical validation of LWPC fidelity below 5kHz. Attached is a preliminary pass (E and B field amplitude vs frequency and distance) with FDTD, showing s
Stefan and Paul, The attached shows B-field FDTD results. Comparing with the E-field plot (previous message): the decorrelation of E and B in the region of interest (2kHz - 4kHz) is interesting. 73,
Stefan and Paul, Attached is a 2nd-pass FDTD plot (E-field only); theoretically more accurate with some small corrections and refinements. The attached plot and the two FDTD plots sent yesterday repr
Hi Jim, ULF/VLF, Thanks for the simulations and plots. I watched them last night already. They seem at least to support the thought that propagation could be complex relative to 8.27 kHz and 6.47 kHz
I'm surprised at the depth of the dips in the FDTD plots, is the amplitude scale correct? The FDTD results are consistent with my complete inability to detect anything of the 2970 Hz signal here, whe
...another thought: It appears to be completely crazy but when looking at these curves i'm asking myselfe if we could get a peak on Wolf's RX on 970 Hz!?? So far i can generate just 5 kV on that ante
Hi Paul, i don't have much time on the weekend i guess. Will spend the time in Mannheim where the YL lives. I can steer the TX via smartphone and Teamviewer though (like done in France). Next week we
Last week I looked at 54 sferics to make a sanity check of the antenna at 3kHz. Here is the average spectrum http://abelian.org/vlf/tmp/170203a.gif Peak is at 8.6 kHz with amplitude 0.11 and the dip
Jim, i assume your plots refer to a constant ERP. Could you scale the plot to a constant antenna current? A range of 0.1...10 kHz is fine. That could be helpful to better understand what could be pos
Stefan, Yes, good point, I'll replot with constant antenna current instead of constant ERP. 73, Jim Jim, i assume your plots refer to a constant ERP. Could you scale the plot to a constant antenna cu
Stefan and Paul, I think that a sferic spectrum of the sort that Paul made (including the well-considered details) is generally more accurate than an FDTD solution* for use in signal-strength predict
Am 05.02.2017 17:35, schrieb Paul Nicholson: Stefan, did your 2970 phase reverse at 16:00 today? No, i have been on the tree, installing a shielded bistable relay which can be switched remotely from
