The PRN files for HFTA are an extremely simple text file list of two
columns of paired numbers. The number in the first column is the
distance from the antenna, and the number in the second column is the
terrain height. You can view ... and edit with any word processor ...
any PRN file anyway you want to. The distance numbers don't need to be
equally spaced since HTFA simply draws a straight line between data
points anyway. The only requirement is that you use the same units for
the data as you do for the height of the antenna.
I generated my PRN files manually by simply reading the distance and
terrain height numbers off a topo program I had. You can do the same
from Google Earth. It's a bit tedious that way but it allows you to
apply whatever granularity you want to the data points, extend the
distance out as far as you want, and do sensitivity analyses for
different heights at different distances.
Open any PRN file with Wordpad or similar and you'll see what I mean.
73,
Dave AB7E
On 1/3/2018 2:11 PM, sq7d wrote:
Hallo
HFTA software uses PRN elevation statistic files to display correlation of that
statistic with antenna gain disturbed by near terrain profile. That PRN file is
generated by the OH6BG Elevation-Angle Analyzer (EAA). EAA needs data from
VOACAP software. If somebody here is familiar with VOACAP and EAA programs
please mail me in case of generate PRN files for SP on most interesting
dx/contest directions (US, JA, AF, AS ect).
Thanks
Matt SQ7D/SN7D
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