For a North Sea point with coordinates derived by GPS satellite in the WGS84 geographical coordinate reference system, with coordinates of:¶           latitude lat_s                =53°48'33.82"N, ¶           longitude lon_s             = 2°07'46.38"E, ¶    and ellipsoidal height h_s = 73.0m, ¶¶whose coordinates are required in terms of the ED50 geographical coordinate reference system which takes the International 1924 ellipsoid. ¶¶The three geocentric translations parameter values from WGS84 to ED50 for this North Sea area are given as dX = +84.87m, dY = +96.49m, dZ = +116.95m. ¶Ellipsoid Parameters are:¶WGS 84               a = 6378137.0 metres    1/f = 298.2572236¶International 1924  a = 6378388.0 metres    1/f = 297.0¶¶Then¶da = 6378388 – 6378137 = 251¶df = 0.003367003 - 0.003352811  = 1.41927E-05¶whence¶dlat  = 2.543"¶dlon  = 5.097"¶dh   =  – 44.909 m¶¶ED50 values on the International 1924 ellipsoid are then:¶           latitude lat_t                 = 53°48'36.563"N, ¶           longitude  lon_t             =  2°07'51.477"E, ¶    and ellipsoidal height h_t  = 28.091 m.