[CQ-Contest] Propagation question

[John Geiger]

Remember too that the MUF is defined as the highest
frequency that is open 50% of the days.  That means
half the time it won't be open, and the CQWW probably
just fell in that other 50%.

73s John AA5JG

--- Steve London <n2icarrl at gmail.com> wrote:

> VOACAP sure doesn't trump real-world experience !
> 
> On this path, VOACAP is incorrect. Most nights, the
> MUF is too low on our end of 
> the path at Europe sunrise, thus no opening. The
> best time for western 
> USA-to-Europe short path on 40 seems to be around
> our local sunset - 23Z-01Z. An 
> even stronger (but shorter) opening is long path at,
> or slightly after, our 
> sunrise. Unfortunately, at that time most of the EU
> activity is up on 20 and 15 
> working the eastern USA.
> 
> 73,
> Steve, N2IC/5 (New Mexico)
> 
> Guy Molinari wrote:
> > I'm reviewing VOACAP SNR graphs as I usually do
> before a major contest.  I'm puzzled by one thing.  
> Just like last year, it appears that the MUF should
> dip below 7mHz at around 0300Z just like last year
> during CQWWCW.    The charts show that the MUF goes
> above 7mHz a few hours later and that according to
> VOACAP, the best time to work central EU on 40M from
> W7 (Pac NW) is at about 0600Z.   Not surprising in
> that it is sunrise there.
> >  
> > I didn't hear a peep last year (I'm using slopers
> which is partly to blame).   The K wasn't that high.
>   Why?   Are you EU guys working JA?   VOACAP is
> usually pretty solid.
> >  
> > Thoughts?
> >  
> > 73 - Guy, N7ZG
> >
>
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