Topband: 160 Meter Propagation

[Bill Tippett]

VE7DXR from p7 of:
http://www3.telus.net/public/shallpat/article/qex_7dxr.pdf

"If we knew the arrival
angle of a received signal during
an enhancement, we could visualize
the phenomenon more clearly"

         I often seen post-sunrise enhancement using an inv-V with
apex up 30m (<0.2 wavelengths and peak TOA straight up).  I believe
we have the same enhancement from stations in EU/Middle East/AF
at their sunrise who are using marginal (i.e. high-angle) antennas.  This
may be some sort of high-angle mode which injects the signal into the
ducting region. Your results might have been very different if you used
high-angle RX antennas for your tests.

                                 73,  Bill  W4ZV