Differences between mean sea levels for the Pacific, Atlantic and Indian Oceans from TOPEX POSEIDON altimetry

Geopotential values (W) over bar of the mean equipotential surfaces representing the mean ocean topography were computed on the basis of four years (1993 - 1996) TOPEX/POSEIDON altimetel data: (W) over bar = 62636854.10 m(2)s(-2) for the Pacific (P), (W) over bar = 62636858.20 m(2)s(-2) for the Atlantic (A), (W) over bar = 62636856.28 m(2)s(-2) for the Indian (I) Oceans. The corresponding mean separations between the ocean levels were obtained as follows: A - P = -42 cm, I-P = -22 on, I-A = 20 cm, the rms errors came out at about 0.3 cm. No sea surface topography model was used irt the solution.