echoes take 2.6 seconds to travel to the Moon and back. Hence scientists and
radio amateurs are familiar with these two echoes – 1/7th second and 2.6
seconds. It was thus something of a surprise when echoes occurred of 8
seconds, 11 seconds and so on. These LDEs are extremely rare. Some estimates
put them as one occurring in every two million transmissions. Most LDEs have
echo times of under 30 seconds, but some have been recorded with times of up
to 5 minutes. They normally occur in the frequency range of 810 KHz to 144
MHz. On rare occasions there are multiple echoes from the original signal.
LDEs may of course be caused by several different factors.
The curvature of a
Hollow Planet would be such that radio waves could bounce around it almost
ad infinitum until they lose their strength. The fact that time delays
varied so much seemed to be extremely strong evidence suggesting that these
waves were bouncing around inside a hollow cavity. One does not know whether
there would be an ionosphere inside the Earth too, and the exact path such
waves might take. Since one is also considering the existence of some kind
of nuclear central Sun inside the Earth – as an integral part of
overall idea - it seems to me to be theoretically possible that it might
produce an ionosphere inside the Earth.
But on rare occasions when the conditions are right, it might just
be able to emerge again over the same area from where it was transmitted.
The Hollow Earth model could also produce the multiple echoes which have
been noted by some scientists. Some radio waves may move around the outside
of the Earth while some go inside and later emerge. All manner of variations
could result from radio waves bouncing around the outside and inside of a