eff_earth_radius_median¶
- pycraf.pathprof.eff_earth_radius_median(lon, lat)[source] [edit on github]¶
Calculate median effective Earth radius, a_e, according to ITU-R P.452-16 Eq (6a).
- Parameters
- lon, lat
Quantity
Geographic longitude and latitude of path center [deg]
- lon, lat
- Returns
- a_e
Quantity
Median effective Earth radius [km]
- a_e
Notes
Uses delta_N, which is derived from digitized maps (shipped with P.452) by bilinear interpolation; see also
deltaN_N0_from_map
.