Regarding the early peak - here in 4X, the band commonly peaks to North
America at about 2 hours before sunrise. The early peak is independent of
the sunrise peak. Sometimes they both occur, and sometimes only one of them
occurs. The early peak is quite common, occuring about 25% of the time
during the winter months. I had thought that this phenomenon, although
perhaps not generally known, occurs everywhere.
See you all in the CQWW!!
73,
Riki, 4X4NJ
----- Original Message -----
From: Bob G3REP <S21YP@granger.bdonline.com>
To: <topband@contesting.com>
Sent: Friday, November 26, 1999 1:11 PM
Subject: Topband: A61AJ observation on propagation
>
> Hi all
>
> It was interesting to note Jeff's comments on propagation from A61
> Quote >>>>>>>
> Pse note that last night, the 0000z opening for 30 mins was LOUDER than
> sunrise - then it closed for about 45 mins around 0100z - - and then
> reopened again about 0210z until 0239z when it closed at dawn.
> >>>>>>>>
> Basically, the band opens (under normal condx) to NA about 2335z. Then
> there is a rapid build-up of signal strength moving toward 0000z - and a
> really intense peak occurs from about 0010-0030z.
> >>>>>>>>>
> The band thereafter sounds "MUSHY" (fully absorbed) and you can tell guys
> are there calling - but you cannot really hear them at all - just a
presence
> of callers.
> Around 0205z, it starts to open again towards sunrise - but nowhere as
good
> as it was earlier at 00z.
> End Quote >>>>>>>>>>>
>
> The above is a precis from two of Jeff's postings.
>
> It bears out what I used to experience from 4S7. (couldn't find it on the
> archives !)
> The band was much quieter during the first opening around 2-3 hours before
> sunrise when the noise comes up significantly.
> S21XX reported similar propagation when I corresponded with him also.
>
>
> Question is
> - what is happening to give the good propagation some 2-3 hours before
> sunrise ?? or should we be thinking xx hours after sunset ??
>
> R E Parkes, Project Manager
> Granger Systems, G.I.D.P Project Office,
> House No. 8, Road 19, Sector 7,
> P O Box 11061, Uttara Model Town,
> Dhaka 1230, Bangladesh
>
> Email: S21YP@bdonline.com
>
> --
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>
>
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