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VK3ABK > ECHOS 22.09.05 01:40l 27 Lines 1005 Bytes #999 (0) @ WW
BID : 5822_VK3BBS
Read: GUEST DJ7KA DK5RAS DF1ND PE5YES DK6RN DJ1EI
Subj: Long Delay Echos.
Path: DB0FHN<DB0MRW<DB0ERF<DB0FBB<DB0BI<DB0PRA<DB0IUZ<DB0GOS<DB0RES<ON0AR<
7M3TJZ<TI3AMM<HP2AT<KD4GCA<N2BQF<VK3FIS<VK3BBS
Sent: 050920/0541Z @:VK3BBS.#MEL.VIC.AUS.OC #:5822 XFBB7.04h Bid:5822_VK3BBS
From: VK3ABK@VK3BBS.#MEL.VIC.AUS.OC
To : ECHOS@WW
Hello all DXers.
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.
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