Antenna Height above Average Terrain (HAAT) Calculator
Values for antenna height above average terrain (commonly abbreviated "HAAT")
can be calculated using this form.
Two terrain databases are available here: the
FCC's legacy 30-second terrain database, and the
GLOBE 1 km Base Elevation
database from the National Geophysical Data Center.
HAAT values can be calculated for any location on Earth, given coordinates and an
antenna radiation center height above mean sea level (usually correlating to the
physical center of the antenna). More about HAAT below the form.