Great results from Stefan, Paul, Jacek, Renato and Wolf; especially interesting because in general groundwave/skywave interference phase noise should be comparatively high at 5170 Hz / 303.8 km, and
Stefan and Paul, I had been guessing issues in or near the receiver, as in your comments below, and the near field reference sounded like a great idea. I thought I would mention that on a few occasio
Stefan and Paul, Nice work! A technical question: I notice ~ 9dB lower Eb/N0 than the 1-character December 28th result (in Todmorden and Bielefeld); is this essentially from an approximately 12x incr
Stefan and Paul, Excellent results; nicely done. The ratio of phase variation* Warsaw/Cumiana seems somewhat (factor of 2 or 3?) disproportionate to the Warsaw/Cumiana Eb/N0 ratio. Do you have a feel
FFT -> excise hum lines -> IFFT, before blanking? Jim AA5BW The location here is bad for VLF, so many power lines. If I posted a sample of the raw signal from the antennas, you would be horrified and
Stefan, Very nice work on identifying ULF core materials, and on transformer design, construction and testing. The transformer looks beautiful. How long did it take to hand wind the 4000 turns? Do
Luis, Thank you for the underground mapping example; nice work by the speleo team. “As this is the near field it is supposed to work only at magnetic field due to the small size of the antenna
Stefan wrote: “…will soon move to 17.47 kHz again to start experimenting with Edgar in VK7, just a path of 16805 km…” That would be a most memorable event in VLF; reaching the
