Geocentric radius of the Earth

Description

Geodetic latitude is the angle between the normal and the equatorial plane. The distance from the Earth’s center to a point on the spheroid surface at a defined geodetic latitude is the Geocentric radius of the Earth.

Related formulas

Variables

R_ϕGeocentric radius of the Earth (km)
aThe equatorial radius of the Earth (km)
ϕThe geodetic latitude (degree)
bThe polar radius of the Earth (km)