We've got 7 definitions »

What does HAAT stand for? 

What does HAAT mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: HAAT.

Filter by: Sort by:PopularityAlphabeticallyCategory
TermDefinitionRating
HAAT

Height Above Average Terrain

Academic & Science » Amateur Radio

Rate it:
HAAT

Human Activity Assistive Technology

Computing » Technology

Rate it:
HAAT

Health Accounts Analysis Tool

Medical » Healthcare

Rate it:
HAAT

Handheld Antenna Array Testbed

Miscellaneous » Unclassified

Rate it:
HAAT

Hawkesbury Artists and Artisans trail

Community » Art

Rate it:
HAAT

Heat And Air Treatment

Miscellaneous » Unclassified

Rate it:
HAAT

Highly Active Antiretroviral therapy

Medical » Therapy

Rate it:

What does HAAT mean?

haat
Height above average terrain (HAAT), or (less popularly) effective height above average terrain (EHAAT), is the vertical position of an antenna site is above the surrounding landscape. HAAT is used extensively in FM radio and television, as it is 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). For international coordination, it is officially measured in meters, even by the Federal Communications Commission in the United States, as Canada and Mexico have extensive border zones where stations can be received on either side of the international boundaries. Stations that want to increase above a certain HAAT must reduce their power accordingly, based on the maximum distance their station class is allowed to cover (see List of North American broadcast station classes for more information on this). The FCC procedure to calculate HAAT is: from the proposed or actual antenna site, either 12 or 16 radials were drawn, and points at 2, 4, 6, 8, and 10 miles (16 km) radius along each radial were used. The entire radial graph could be rotated to achieve the best effect for the station. The altitude of the antenna site, minus the average altitude of all the specified points, is the HAAT. This can create some unusual cases, particularly in mountainous regions—it is possible to have a negative number for HAAT (the transmitter would not be located underground, but rather in a valley, with hills on both sides taller than the transmitter itself, for example). The FCC has divided the Contiguous United States into three zones for the determination of spacing between FM and TV stations using the same frequencies. FM and TV stations are assigned maximum ERP and HAAT values, depending on their assigned zones, to prevent co-channel interference. The FCC regulations for ERP and HAAT are listed under Title 47, Part 73 of the Code of Federal Regulations (CFR).

see more »

Discuss these HAAT abbreviations with the community:

0 Comments

    Know what is HAAT? Got another good explanation for HAAT? Don't keep it to yourself!

    Still can't find the acronym definition you were looking for? Use our Power Search technology to look for more unique definitions from across the web!

    Citation

    Use the citation options below to add these abbreviations to your bibliography.

    Style:MLAChicagoAPA

    "HAAT." Abbreviations.com. STANDS4 LLC, 2024. Web. 19 Mar. 2024. <https://www.abbreviations.com/HAAT>.

    Image or illustration of

    HAAT

    Height Above Average Terrain
    Credit »

    Browse Abbreviations.com

    Free, no signup required:

    Add to Chrome

    Get instant explanation for any acronym or abbreviation that hits you anywhere on the web!

    Free, no signup required:

    Add to Firefox

    Get instant explanation for any acronym or abbreviation that hits you anywhere on the web!

    Quiz

    The ultimate acronym test

    »
    PHD
    A Pretty Hard to Do
    B Philosophiae Doctor
    C Practical Dentist
    D Push Here, Dummy

    Embed

    Share an image of HAAT

    »

    Hearing impaired tip:

    Sign language

    How do you say HAAT in ASL sign language fingerspelling?