Height above average terrain
Height above average terrain (HAAT) (or less popularly, EHAAT, Effective Height Above Average Terrain) is a measure of how high 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 (both of which use metric) have extensive border zones where international 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 broadcast station classes for more information on this).
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 (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, was 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).
Podcasts:
Haat
ALBUMS
- Recidivus in Obscurum released: 2002
- Factum Luctisonus released: 2001
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Kristina
by: Howie DayOn the phone to Saturday
Where did you go?
'Cause the tequila from your kiss is still around
And you're down
To remind me
I know that you're away
But you're not gone
Reeling inside
She wants to call
She can spin my motivation
Like a record off the wall
Don't you try
For anyone but yourself?
You do for me - don't you
I can feel it in your mind
Kristina falls down to the floor
She is fine and it's alright
She said you're broken drowned and drunk
No one had ever felt like she did before
Before you
Did you know that if you go down to planeside
I will be there waiting for you
At the top of the stairs
And you will be so beautiful
Kristina said
Let's have your party December
I don't know why she tries to be so real
Kristina said
Let's have your baby in September
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