Paul, W3CRA was not at the top of the hill but slightly over the south side of
the hill might the problem you are finding. The tower is still up but the
antenna broken with only one element in place. This location is about 10 miles
from me next time there I will try to get pic.
Paul
W3PLP
Sent from my iPad 3
> On Jun 21, 2014, at 10:48 PM, "Paul Christensen" <w9ac@arrl.net> wrote:
>
> 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
>
>
>
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