--- David Gilbert <xdavid@cis-broadband.com> wrote:
>
> That being said, I don't quite get the comment that
> the 1 and 2 degree
> elevation angles represent a similar percentage of
> openings as the rest
> of the higher angles. I've reproduced below a
> portion of the actual
> text data file used by HFTA for the W0-CO-US paths
> and I don't see
> anything at 1 degree and not much at 2 degrees.
My mistake, seat of the pants comment. You're right,
the W0-CO-US path certainly leans toward the higher
angles but the statistics still show a big difference
at the low angles between CO and ND/IA so I'm not sure
how to extrapolate for SD. I pasted in the first 5
degree figures for all 3 below.
And.. I was using YT for my analysis and wasn't even
aware that HFTA was out there. After a little
research I can see that I should give HFTA a try and
also use some of the new, more complete, methods of
generating terrain files using DEMs. My antenna book
is a few years old and doesn't include HFTA so think
I'll order a new book but will have to wait for a
while to get the software. Looking forward to seeing
the results.
Thanks again for all the good comments... great
education!
Denver to USA
Elev 80m 40m 30m 20m 17m 15m
12m 10m
1 0.0 0.0 0.0 0.0 0.0 0.0
0.0 0.0
2 0.0 0.8 1.3 2.3 3.1 2.4
1.1 0.0
3 3.8 3.9 4.8 7.5 12.3 10.7
7.5 4.0
4 6.5 9.6 4.0 4.0 6.9 9.5
10.8 8.6
5 2.5 3.6 5.7 2.1 4.6 5.7
7.5 6.6
Des Moines to USA
Elev 80m 40m 30m 20m 17m 15m
12m 10m
1 0.0 0.0 0.0 0.0 0.0 0.0
0.0 0.0
2 0.0 0.0 0.0 0.0 0.0 0.0
0.0 0.0
3 0.0 0.0 0.0 0.0 0.0 0.0
0.0 0.0
4 0.0 0.6 1.0 1.2 2.1 1.6
0.0 0.0
5 1.2 2.4 4.0 6.6 9.1 6.3
3.5 1.6
Bismarck to USA
Elev 80m 40m 30m 20m 17m 15m
12m 10m
1 0.0 0.0 0.0 0.0 0.0 0.0
0.0 0.0
2 0.0 0.0 0.0 0.0 0.0 0.0
0.0 0.0
3 0.0 0.0 0.0 0.0 0.0 0.0
0.0 0.0
4 0.0 0.0 0.0 0.0 0.0 0.0
0.0 0.0
5 0.2 0.9 1.5 3.1 4.1 2.4
0.8 0.0
Gary Slagel/N0SXX
Lakewood, CO
http://marina.fortunecity.com/sanpedro/351
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