[TowerTalk] terrain profile algorithm

[Ian White GM3SEK]

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
http://www.ifwtech.co.uk/g3sek