[TowerTalk] HFTA Angles Data

[David Gilbert]

If I remember correctly, Dean Straw said that the ARRL crunched the 
numbers back in the mid-90's using a computer that took a few days, but 
I'm not sure it really matters.  We're talking optimum takeoff/arrival 
angles here, and I'm not sure that angle is a strong function of F-layer 
densities.  It would be pretty easy to check ... just run a few paths in 
VOACAP for the same hour of the day using two different SSNs and compare 
the TANGLE results for various frequencies.

73,
Dave   AB7E



On 7/31/2013 8:42 PM, Roger wrote:
> But is average really average.  The sunspot cycles highs and lows we 
> have recently experienced are quite different than previous cycles and 
> so far this is reportedly, the lowest in a hundred years.
> From what cycle are the averages taken, or is the information updated 
> to reflect current cycles?
>
> I don't remember 40 ever being consistently as good for DX throughout 
> the nights as it was for 4 or 5 recent years.
>
> 73
>
> Roger (K8RI)
>
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