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VK3ABK > ECHOS 23.10.05 02:05l 38 Lines 1347 Bytes #999 (0) @ WW
BID : 10493_VK3HEG
Read: OE5RCO OE7HNT DK5RAS DG1VV DO1EH DF1ND GUEST DK6RN DJ1EI
Subj: Long Delay Echos.
Path: DB0FHN<DB0RGB<DB0MRW<DB0WUE<DK0WUE<DB0RES<ON0AR<IK1ZNW<IW2OAZ<ZL2BAU<
VK7AX<VK3HEG
Sent: 051022/0651Z @:VK3HEG.#WEV.VIC.AUS.OC #:10493 [Ballarat] $:10493_VK3HEG
From: VK3ABK@VK3HEG.#WEV.VIC.AUS.OC
To : ECHOS@WW
Hello all HF DXers.
I sent a bulletin on 20/09/05 about Long Delay Echos, and asked for any
information about them. I haven't seen a reply, but surely some HF DXer
has heard them or knows something about how they are heard. I have had no
experience of LDEs, only read about them. Do they exist?
I sent this bulletin...
I have been thinking about Long Delay Echos (LDEs) that have been reported
by Amateurs using the HF bands. These echos, of a radio transmision, are
said to occur within seconds, but I have seen reports of delays of minutes,
even hours, after a being sent.
I can imagine an RF signal being conducted around the Earth via ionospheric
strata, which could account for 'seconds' of delay, but how can a radio
wave be 'stored' and received at readable strength 'hours' later?
This question recurred after reading some of the 'GHOST' bulletins, and
I think there may be a similar explanation as to the cause. I wonder if it
is something that comes from a 'fertile' mind.
Has anyone experienced LDEs, or can there be a reasonable explanation for
them. I remember reading about very long LDEs in CQ magazine, and I think
the author had recorded evidence, or at least a witness to back him up.
Any comments appreciated.
73. Dick. VK3ABK.
Ditto, and 73 again. Dick. VK3ABK.
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