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3-D visualizations of coastal bathymetry by utilization of airborne TOpSAR polarized data

International Journal of Digital Earth 2010年第2期3卷 187-206页

作者： Maged Marghany arthur p.cracknell Mazlan Hashim Institute for Science and Technology Geospatial(INSTEG) Faculty of Geoinformation Science and EngineeringUniversiti Teknologi Malaysia81310 UTMSkudaiJohore BahruMalaysia

Multi-frequency C and L bands in the TOpSAR data have been utilized to reconstruct three-dimensional(3-D)bathymetry *** main objective of this study is to utilize fuzzy arithmetic to reduce the errors arising from speckle in synthetic aperture radar(SAR)data when constructing ocean bathymetry from polarized SAR *** doing so,two 3-D surface models,the Volterra algorithm and a fuzzy B-spline(FBS)algorithm,which construct a global topological structure between the data points,were used to support an approximation to the real *** algorithm was used to express the non-linearity of TOpSAR data intensity gradient based on the action balance equation(ABC).In this context,a first-order kernel of Volterra algorithm was used to express ABC *** inverse of Volterra algorithm then performed to simulate 2-D current velocities from CVV and LHH ***,the 2-D continuity equation then used to estimate the water *** order to reconstruct 3-D bathymetry pattern,the FBS has been performed to water depth information which was estimated from 2-D continuity *** best reconstruction of coastal bathymetry of the test site in Kuala Terengganu,Malaysia,was obtained with polarized L and C bands SAR acquired with HH and VV polarizations,*** 10 m spatial resolution of TOpSAR data,bias of0.004 m,the standard error mean of 0.023 m,r2 value of 0.95,and 90%confidence intervals in depth determination was obtained with LHH band.

关键词： TOpSAR polarized data Volterra algorithm fuzzy B-spline algorithm bathymetry

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3-D reconstruction of coastal bathymetry from AIRSAR/pOLSAR data

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Chinese Journal of Oceanology and Limnology 2009年第1期27卷 117-123页

作者： Maged MARGHANY Mazlan HASHIM arthur p. cracknell Department of Remote Sensing Faculty of Geoinformation Science and Engineering Universiti Teknologi Malaysia 81310UTM Skudai Johore Bahru Malaysia

This paper introduces a new method for reconstructing three-dimensional （3D） coastal bathymetry changes from Airborne AIRSAR/pOLSAR synthetic aperture data. The new method is based on integration between fuzzy B-spline and Volterra algorithm. Volterra algorithm is used to simulate the ocean surface current from AIRSAR/pOLSAR data. Then, the ocean surface current information used as input for continuity equation to estimate the water depths from AIRSAR/pOLSAR data. This study shows that 3D ocean bathymetry can be reconstructed from AIRSAR/pOLSAR data with root mean square error of ±0.03 m.

关键词： AIRSAR/pOLSAR data Volterra algorithm Fuzzy B-spline 3D bathymetry

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