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Height above average terrain - Wikipedia, the free encyclopedia |
 | | Height above average terrain (HAAT) is used extensively in FM radio and television, as it is actually much more important than effective radiated power (ERP) in determining the range of broadcasts (VHF and UHF in particular, as they are line of sight transmissions). |
 | | Before metrification at the FCC, the procedure to figure HAAT was relatively simple: from the proposed or actual antenna site, either 12 or 16 radials were drawn, and points at 2, 4, 6, 8, and 10 miles radius along each radial were used. |
 | | Zone III (the zone with the flattest terrain) consists of all of Florida and the areas of Alabama, Georgia, Louisiana, Mississippi, and Texas within approximately 241.4 kilometers (150 miles) of the Gulf of Mexico. |
| en.wikipedia.org /wiki/HAAT (649 words) |
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