NSIDC Sea Ice Polar Stereographic South 3412 Unspecified datum based upon the Hughes 1980 ellipsoid 4054 ellipsoidal 6402 Geodetic latitude 9901 Lat north Geodetic longitude 9902 Lon east Not_specified_based_on_Hughes_1980_ellipsoid 6054 Greenwich 8901 0 Hughes 1980 7058 6378273 298.279411123064 Cartesian 4400 Easting 9906 E east Northing 9907 N north