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035 _a.b11822181
099 9 _aAIT Thesis no.SR-00-07
100 0 _aVu Tuong Thuy
245 1 0 _aEffect of coherence on DEMs derived from SAR interferometry :
_ba case study of Mayon volcano, Philippines
260 _aBangkok :
_bAsian Institute of Technology,
_c2000
300 _a86, [4] leaves
490 1 _aThesis ;
_vno. SR-00-07
500 _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Advanced Technologies
502 _aThesis (M. Eng.) - Asian Institute of Technology, 2000
520 _aSynthetic Aperture Radar (SAR) Interferometry is the technique for obtaining the Digital Elevation Model (DEM) of the Earth surface by processing the phase difference between coincidence SAR images. In this technique, coherence coefficient (CC) is the most important factor. This study is to investigate the effect of CC on the DEM of Mayon Volcano, Philippines derived from SAR interferometry technique. First, applying SAR interferometry, the DEM of Mayon Volcano is derived. Then, this DEM is compared to the referenced DEM derived from topographic map to investigate the relationship between DEM accuracy and CC value. Further, the land cover type categorized by Normalized Difference Vegetation Index (NDVI) is investigated with the changes of CC. The result show that the DEM accuracy decreases following the exponential function when CC increases. It is also concluded that for forest area, when NDVI increases, CC decreases following the negative-sloped line. This research proposes the method for detection of lava flow by combining CC and NDVI. From this study, the results can be used for the further researches either in application site or in technique site. It is recommended that it is necessary to validate DEM in any application and to improve phase unwrapping algorithm.
650 0 _aSynthetic aperture radar
_zPhilippines
650 0 _aVolcanoes
_zPhilippines
700 1 _aTokunaga, Mitsuharu,
_eChairperson
700 1 _aHonda, Kiyoshi,
_eExamination Committee
700 0 _aApisit Eiumnoh,
_eExamination Committee
700 1 _aSchumann, Robert L. G.,
_eExamination Committee
710 2 _aAIT Partial Scholarship,
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. SR-00-07
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B06825
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_tAbstract--AIT Thesis no.SR-00-7
_vn
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