[TowerTalk] HFTA

[Ian White GM3SEK]

Steve wrote:
>I haven't used HFTA for a couple of years and the web site from which
>topographic data is downloaded has changed somewhat.
>
>The Elevation ==> 1' NED option mentioned in the HFTA instructions is no
>longer available. There are, however, three other NED options  in the
>Elevation drop down list: NED shaded relief (1/9 arc second); NED shaded
>relief (1/3 arc second); and NED shaded relief (2 arc second).
>
>Will any of the three newer NED elevation choices meet HFTA's needs?
>Which one?
>
>I'm using the version of HFTA that came with the 20th edition of the
>ARRL Antenna Book.

Have you downloaded the latest HFTA instructions from the ARRL site?
http://www.arrl.org/notes/9876/HFTA.pdf (updated Sep 10th, 2007)


-- 

73 from Ian GM3SEK         'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek