HAAT Calculator & Elevation Finder

Calculate elevation and height above average terrain (HAAT) using the FCC's API.

NAD83 Latitude:
- ' " *

NAD83 Longitude:
- ' " *

Radiation Center Height:
meters *

- Above Mean Sea Level (RCAMSL)
- Above Ground Level (RCAGL)

Number of Radials:

Terrain Database:

Legacy FCC30 terrain is not available through the FCC API. Use the FCC HAAT Calculator instead.

Station Class for ERP Check: (optional)

Decimal Coordinates:
Latitude: 37.709556
Longitude: -121.478000

Site Elevation:
43.27 meters

Radiation Center Above Mean Sea Level (RCAMSL):
54.5 meters

Height Above Average Terrain:
-72 meters, based on 8 radials.
(rounded from -72.46 m)

HAAT Along Each Radial:

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