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Global ocean tide mapping using TOPEX/Poseidon altimetryThe investigation's main goals are to produce accurate tidal maps of the main diurnal, semidiurnal, and long-period tidal components in the world's deep oceans. This will be done by the application of statistical estimation techniques to long time series of altimeter data provided by the TOPEX/POSEIDON mission, with additional information provided by satellite tracking data. In the prelaunch phase, we will use in our simulations and preliminary work data supplied by previous oceanographic missions, such as Seasat and Geosat. These results will be of scientific interest in themselves. The investigation will also be concerned with the estimation of new values, and their uncertainties, for tidal currents and for the physical parameters appearing in the Laplace tidal equations, such as bottom friction coefficients and eddy viscosity coefficients. This will be done by incorporating the altimetry-derived charts of vertical tides as boundary conditions in the integration of those equations. The methodology of the tidal representation will include the use of appropriate series expansions such as ocean-basin normal modes and spherical harmonics. The results of the investigation will be space-determined tidal models of coverage and accuracy superior to that of the present numerical models of the ocean tides, with the concomitant benefits to oceanography and associated disciplinary fields.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Sanchez, Braulio V.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Cartwright, D. E.
(ST Systems Corp. Lanham, MD., United States)
Estes, R. H.
(ST Systems Corp. Lanham, MD., United States)
Williamson, R. G.
(ST Systems Corp. Lanham, MD., United States)
Colombo, O. L.
(Maryland Univ. College Park., United States)
Date Acquired
August 16, 2013
Publication Date
September 1, 1991
Publication Information
Publication: JPL, TOPEX(Poseidon Science Investigations Plan
Subject Category
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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