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`gc2gde(`

`xyz`, `a`, `f`)

[SOFA] Returns geodetic coordinates (eastward longitude in radians,
northward latitude in radians, height above the ellipsoid in meters)
corresponding to geocentric coordinates

using a
reference ellipsoid with equatorial radius `xyz`

and
flattening `a`

. `f`

and `xyz`

must
be in the same units, and the returned height is given in that same
unit, too. `a`

must have 3 elements in its first
dimension. `xyz`

and `a`

must each have a single
element. The result has the same dimensions as `f`

.
`xyz`

See also: Astronomical Coordinate Calculations