eff_earth_radius_median

pycraf.pathprof.eff_earth_radius_median(lon, lat)

Calculate median effective Earth radius, a_e, according to ITU-R P.452-16 Eq (6a).

Parameters:

lon, latQuantity

Geographic longitude and latitude of path center [deg]

Returns:

a_eQuantity

Median effective Earth radius [km]

Notes

• Uses delta_N, which is derived from digitized maps (shipped with P.452) by bilinear interpolation; see also deltaN_N0_from_map.