The short/long path interference pattern now seems to move slowly down in frequency, best seen around 19730 Hz . The same effect could be seen on Markus' VLF grabber, looking like a 'hook' sometimes.
Bearing was 78/258 deg +/- 4, NWC is on 82.4 deg and the GC paths are 13650km and 26380km, difference is 12730 km along the ground, or 12810 at mid height of Earth-Ionosphere waveguide. Resulting int
Dear LF, Jean Pierre, Laurence, the attached image is a false colour assembly of grabber captures above 19 kHz from the last four days. The timescale is 10 minutes per pixel from April 1, 06:00 until
After Paul's hint to orient the loop for E/W, I can also see the NWC fading pattern with the indoor H-field loop, despite QRM : Cheers, Wolf . Paul Nicholson schrieb: Bearing was 78/258 deg +/- 4, NW
Dear Paul, Wolfgang, thank you very much for sharing your results! This is an excellent confirmation. I'm still amazed at the day to day phase reproduciboility, which seems to be only a fraction of a
Markus Vester schrieb: Here is a 15 minute wide spectrogram of 19700 Hz to 19900 Hz taken on 1st April while GBZ was off-air. http://abelian.org/live/mv100404a.png The bands are about 23.3 Hz apart.
