Radius at Geocentric Latitude Calculating the radius of a planet at geocentric latitude. Description The Radius at Geocentric Latitude block determines the radius of the planet at the given geocentric latitude using the formula where - planet radius, m; - geometric contraction (ellipticity); - geocentric latitude, deg; - equatorial radius of the planet, m. Ports Input λs - geocentric latitude scalar | vector Geocentric latitude, deg. Data types: Float64. Output rs - radius scalar | vector The radius of a planet at geocentric latitude, m. Data types: Float64.