Re: [IRCA] Elad FDM S1 + Miscellaneous Mumblings

[Chuck Hutton <charlesh3@xxxxxxx>]

Nick:
 
Paragraph #1: Linear regression is built into Excel so the world can enjoy it.
 
Regression analysis to understand the degree of correlation between variables is very standard stuff. If Bob didn't mention it, it's because he didn't mention basic techniques of statistical analysis.
 
 
Chuck
 
> Date: Tue, 31 Dec 2013 07:01:46 +0000
> To: irca@xxxxxxxxxxxxxxxx
> From: nhp@xxxxxxxx
> Subject: Re: [IRCA] Elad FDM S1 + Miscellaneous Mumblings
> 

> 
> It's an interesting point that you raise about regression analysis as 
> applied to overseas signal strengths.  I have very little experience 
> with it, pretty much limited to deriving coefficients for a known 
> equation using  someone else's program, and that quite some time ago.
> 
> Two things are a concern to me.   One is that the late Bob Brown, 
> NM7M, who studied the daylights out of 160 meter (and other bands) 
> propagation, was a retired physicist, and to my recollection, never 
> mentioned regression analysis as a way of making sense of reception 
> patterns, though I would imagine it must have been part of his 
> professional toolbox.  I suspect that even the relationships with 
> A-indices look pretty random, barring "high A-indices (almost always) 
> suppress good reception of Asiatic signals in  Victoria, except on 
> occasional October mornings"
> 

> 
> best wishes, & HNY to you also.
> 
> Nick
 		 	   		  
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