Accession Number : ADA115841

Title :   Modeling and Adjusting Global Ocean Tides Using SEASAT Altimeter Data.

Descriptive Note : Final rept. 1 Nov 77-31 Dec 81,

Corporate Author : NOVA UNIV OCEANOGRAPHIC CENTER DANIA FL

Personal Author(s) : Blaha,Georges

PDF Url : ADA115841

Report Date : Mar 1982

Pagination or Media Count : 103

Abstract : In the recent past, SEASAT altimeter data together with global geoidal parameters and sets of state vectors parameters have been adjusted at AFGL through the short-arc algorithm using NSWC precise ephemeris. The excellent quality of the data system, including the altimeter measurements, the ephemeris, the input geoidal parameters, etc., has been confirmed by the finding that the empirical variance for geoid undulations is significantly lower than the theoretical variance. The altimeter residuals from this adjustment have served in regional modeling of short-wavelength geoidal features, as well as in studying geophysical phenomena such as ocean bottom topography. Since the geoid has been assumed to coincide with the ocean surface sensored by the altimeter, the sea-surface effects have been ignored in this adjustment. Due to increasing geophysical interest in a realistic representation of the open ocean tide, the latest development of the short-arc satellite altimetry model allows for the inclusion of the most important tidal constituents. In particular, an adjustment algorithm has been designed in which four long-period constituents, three diurnal constituents and four semidiurnal constituents may be subject to adjustment within the overall adjustment of SEASAT altimetric observations.

Descriptors :   *OCEAN TIDES, GLOBAL, RADIO ALTIMETERS, ARTIFICIAL SATELLITES, GEOIDS, VARIATIONS, EQUILIBRIUM(GENERAL), MATHEMATICAL MODELS

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE