[TowerTalk] SRTM Fill Data

[Paul Christensen]

Been trying to model the legendary W3CRA site using HFTA.   I downloaded the 
SRTM 1 arc-second data in a .TIF format from the NASA website.  All is 
working well except that a few north bearings from the site appear to have 
been data-shadowed during the year 2000 space shuttle capture.   This shows 
as a dead terrain zone between 900 ft to 2200 ft on the hill just north of 
the site.   That's a huge problem since HFTA heavily depends on the 
mid-field terrain data.  In researching this effect, apparently quite a few 
SRTM tiles require "fill data" from an alternate source.

I figured out how to merge .TIF data image tiles, but does anyone know how 
to add fill data back into a .TIF file and exactly what 1 arc-second source 
to use?  Tnx!

Paul, W9AC