[Propagation] SnapMAX

[Carl K9LA <k9la@gte.net>]

 Hi Crawford,

It's been a while since we last chatted - I believe the last time was 
when a gentleman said your book "The Friendly Ionosphere" supported his 
theory of NVIS propagation on 10m.

I'm curious - how far does SnapMAX say a multi-hop signal can go on 160m 
in the dark ionosphere before it's at the noise floor of a typical 
receiver (around -135dBm)? I've gone through this with Proplab (using 
1000w and verticals on both ends in a winter month), and the distance is 
around 12,000km. Of course this distance limit would really be somewhat 
less because I did not include noise in the picture.

I'd be interested to see how your SnapMAX calculation compares to a 
rigorous ray trace. I figure you can do this with SnapMAX quicker than I 
can.

Carl K9LA

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