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15.5.271 gc2gd

gc2gd(ellid, xyz)

[SOFA] Returns geodetic coordinates (eastward longitude in radians, northward latitude in radians, height above the ellipsoid in meters) corresponding to geocentric coordinates xyz (in meters) using the specified reference ellipsoid ellid (1 = wgs84, 2 = grs80, 3 = wgs72). xyz must have 3 elements in its first dimension, and ellid must have a single element. The result has the same dimensions as xyz.

See also: Astronomical Coordinate Calculations