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KA9LCF > NEWS 18.01.12 18:05l 34 Lines 1321 Bytes #999 (0) @ ALLIN
BID : 33423_KA9LCF
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Subj: ARN: Radio Science
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Sent: 120114/1851Z @:KA9LCF.#NEIN.IN.USA.NOAM #:33423 [164508] FBB7.01.35 alpha
From: KA9LCF@KA9LCF.#NEIN.IN.USA.NOAM
To : NEWS@ALLIN
RADIO SCIENCE: UK HAMS EXPERIENCE DELAYED ECHO PHENOMENA ON
80 METERS
Two UK amateurs have reported hearing strong echoes on their
80 meter CW signals in the evening. Tony Roskilly, G3ZRJ in
Herefordshire and Andrew Fairgrieve, GW3OQK in Swansea were
in QSO on January 1st when they could hear another signal
underneath theirs. It turned out to be an echo of their own
signals.
Roskilly said the echoes were initially so strong that he
had trouble monitoring his CW keying. The delay in the
echoes was of the order of a quarter to a half second and
the echo strength hit S9. Tests by Fairgrieve on the
evening of the 3rd of January revealed the same phenomena at
around 21.00 UTC, albeit weaker in signal strength.
Steve Nichols, G0KYA, is the chairman of the RSGB's
Propagation Studies Committee. He says that these were
unlikely to be round-the-world echoes, but could be due to a
form of magnetospheric ducting where signals follow the
earth's magnetic field lines down to the southern hemisphere
before being bounced back along the same duct. Nichols said
that this was quite rare and not really understood.
Amateurs are being urged to look out for any echoes on their
80 meter signals and report any findings to G0KYA (at) qsl
(dot) net. (GB2RS)
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