[TowerTalk] terrain profile algorithm

Ian White GM3SEK gm3sek at ifwtech.co.uk
Sat Jun 16 10:43:33 PDT 2012

Jim Lux wrote:
>> If may be easier than you think, because HFTA already makes a linear
>> extrapolation between data points, regardless of horizontal separation.
>Does it?  or does it treat each segment as a flat plate a'la the paper 
>by Breakall, et al.
>If it were doing a raytracing physical optics approach, then yes, you'd 
>cast the ray to the point of intersection with the surface, figure out 
>the angle, determine the reflection, and move on.
>But I seem to recall that HFTA does something more like GTD.

It's been a few years now, but in correspondence with Dean Straw about 
the general topic of creating data sets, I don't recall any mention of 
conflicts arising from the internal model.


73 from Ian GM3SEK

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