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[TowerTalk] TA or HFTA

Subject: [TowerTalk] TA or HFTA
From: Pete Smith <>
Date: Sat, 08 Jan 2005 22:25:59 -0500
List-post: <>
I think there is some confusion afoot here. TA was DOS software written and marketed by Brian Beezley, K6STI. It was a rough contemporary of, and quite similar to YT, (Yagi Terrain) which N6BV wrote and the ARRL bundled with the Antenna Book from about the 18th Edition on. HFTA is the new, Windows version which is bundled with the 20th edition of the Antenna Book. Aside from the much nicer Windows user interface, HFTA (HF Terrain Analysis) also incorporates a new figure of merit for evaluating the fit between antenna patterns and arrival angle of signals from target areas, as estimated by IONCAP. It also uses terrain data derived from the National Elevation Database which has been made available on the web by USGS. Much more accurate than pencil lines on a topo map, and easier to do.

For the sake of full disclosure, I was a beta tester for HFTA and helped write some of the documentation, but I wasn't paid for it....

73, Pete N4ZR
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