Hi Jim yes I think it is a phase effect, the reinforcement/cancellation is probably between 2 hop and 3 hop paths. A 16dB fade suggests 20dB or so difference in amplitude. I used to reckon on about a
Alan, based on Loran-C measurements, I would agree on the ballpark figure of -6 dB per hop. Not sure though if land reflections are really so much worse than seawater, as for low angle incidence the
Hi Markus....Ah used the wrong thumb :-)) yes I though it did seem odd..... I had taken the low level instead of the difference. A recalc gives hop 3 at -7dB wrt hop 2 that ties in nicely with your L
