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: 39.418167
Longitude: -77.402750

Site Elevation:
89.91 meters

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

Height Above Average Terrain:
-19 meters, based on 8 radials.
(rounded from -19.42 m)

HAAT Along Each Radial:

Azimuth HAAT
017.39
4510.41
900.64
135-10.69
18017.98
225-15.69
270-33.51
315-141.86