Quasi-stationary sea surface topography estimation by the multiple input/output method |
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| Authors: | V D Andritsanos M G Sideris I N Tziavos |
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| Institution: | (1) Department of Geodesy and Surveying, Aristotle University of Thessaloniki, University Box 440, 540 06 Thessaloniki, Greece, GR;(2) Department of Geomatics Engineering, University of Calgary, 2500 University Drive N.W., Calgary, Alberta, T2N 1N4 Canada, CA |
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| Abstract: | Multiple input/multiple output system theory (MIMOST) is briefly presented, and the application of the method to the quasi-stationary
sea surface topography (QSST) estimation and the filtering of the input observations are discussed. The repeat character of
satellite altimetry missions provides more than one sample of the measured sea surface height (SSH) field, and an approximation
of the input signal and error power spectral densities can be determined using this successive information. A case study in
the Labrador Sea is considered using SSHs from ERS1 phases C and G, ERS1-GM, ERS2 phase A and TOPEX/POSEIDON altimetric missions
in combination with shipborne gravity anomalies. The time period of the observations in this study is from 1993 to 1998. Some
comparisons between the techniques used for the power spectral density approximation are carried out and some remarks on the
properties of the estimated QSST are presented.
Received: 19 October 1999 / Accepted: 23 October 2000 |
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| Keywords: | : Multiple Input/Multiple Output Method Satellite Altimetry Sea Surface Topography Geoid Gravity |
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