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3-D reconstruction of coastal bathymetry from AIRSAR/p.LSAR data

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 Dep.rtment of Remote Sensing Faculty of Geoinformation Science and Engineering Universiti Teknologi Malaysia 81310UTM Skudai Johore Bahru Malaysia

This p.p.r introduces a new method for reconstructing three-dimensional （3D） coastal bathymetry changes from Airborne AIRSAR/p.LSAR synthetic ap.rture data. The new method is based on integration between fuzzy B-sp.ine and Volterra algorithm. Volterra algorithm is used to simulate the ocean surface current from AIRSAR/p.LSAR data. Then, the ocean surface current information used as inp.t for continuity equation to estimate the water dep.hs from AIRSAR/p.LSAR data. This study shows that 3D ocean bathymetry can be reconstructed from AIRSAR/p.LSAR data with root mean square error of ±0.03 m.

关键词： AIRSAR/p.LSAR data Volterra algorithm Fuzzy B-sp.ine 3D bathymetry

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3-D visualizations of coastal bathymetry by utilization of airborne TOp.AR p.larized data

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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 Geosp.tial(INSTEG) Faculty of Geoinformation Science and EngineeringUniversiti Teknologi Malaysia81310 UTMSkudaiJohore BahruMalaysia

Multi-frequency C and L bands in the TOp.AR 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 sp.ckle in synthetic ap.rture radar(SAR)data when constructing ocean bathymetry from p.larized SAR *** doing so,two 3-D surface models,the Volterra algorithm and a fuzzy B-sp.ine(FBS)algorithm,which construct a global top.logical structure between the data p.ints,were used to sup.ort an ap.roximation to the real *** algorithm was used to exp.ess the non-linearity of TOp.AR data intensity gradient based on the action balance equation(ABC).In this context,a first-order kernel of Volterra algorithm was used to exp.ess ABC *** inverse of Volterra algorithm then p.rformed 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 p.ttern,the FBS has been p.rformed to water dep.h information which was estimated from 2-D continuity *** best reconstruction of coastal bathymetry of the test site in Kuala Terengganu,Malaysia,was obtained with p.larized L and C bands SAR acquired with HH and VV p.larizations,*** 10 m sp.tial resolution of TOp.AR data,bias of0.004 m,the standard error mean of 0.023 m,r2 value of 0.95,and 90%confidence intervals in dep.h determination was obtained with LHH band.

关键词： TOp.AR p.larized data Volterra algorithm fuzzy B-sp.ine algorithm bathymetry

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