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A Global Ocean Tide Model From TOPEX/POSEIDON Altimetry: GOT99.2Goddard Ocean Tide model GOT99.2 is a new solution for the amplitudes and phases of the global oceanic tides, based on over six years of sea-surface height measurements by the TOPEX/POSEIDON satellite altimeter. Comparison with deep-ocean tide-gauge measurements show that this new tidal solution is an improvement over previous global models, with accuracies for the main semidiurnal lunar constituent M2 now below 1.5 cm (deep water only). The new solution benefits from use of prior hydrodynamic models, several in shallow and inland seas as well as the global finite-element model FES94.1. This report describes some of the data processing details involved in handling the altimetry, and it provides a comprehensive set of global cotidal charts of the resulting solutions. Various derived tidal charts are also provided, including tidal loading deformation charts, tidal gravimetric charts, and tidal current velocity (or transport) charts. Finally, low-degree spherical harmonic coefficients are computed by numerical quadrature and are tabulated for the major short-period tides; these are useful for a variety of geodetic and geophysical purposes, especially in combination with similar estimates from satellite laser ranging.
Document ID
19990089548
Document Type
Technical Memorandum (TM)
Authors
Ray, Richard D. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1999
Subject Category
Oceanography
Report/Patent Number
NASA/TM-1999-209478
NAS 1.15:209478
Rept-99B00073
Funding Number(s)
PROJECT: RTOP 926-00-00
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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