Hi Wolf, et.al. GBR (16kHz) went off air at 10.00 UTC this morning and sent its call sign in CW at 10.04. Now all is quiet, so stand by. I tried out the Software VLF receiver yesterday, and it worked
Hi Uwe and group, DJ8WX's recent waterfall image certainly shows the French Navy's signal on 18.3. Their modulation is indeed a bit broader than GBR. For comparison, a small spectrum plot from monday