03646nas|a2200481 i 4500 20260818094905.0 090301s2000 th uu m rtt 0| a1eng d .b11822181 AIT Thesis no.SR-00-07 Vu Tuong Thuy Effect of coherence on DEMs derived from SAR interferometry : a case study of Mayon volcano, Philippines Bangkok : Asian Institute of Technology, 2000 86, [4] leaves Thesis ; no. SR-00-07 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Advanced Technologies Thesis (M. Eng.) - Asian Institute of Technology, 2000 Synthetic 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. Synthetic aperture radar Philippines Volcanoes Philippines Tokunaga, Mitsuharu, Chairperson Honda, Kiyoshi, Examination Committee Apisit Eiumnoh, Examination Committee Schumann, Robert L. G., Examination Committee AIT Partial Scholarship, Scholarship Donor Asian Institute of Technology. Thesis ; no. SR-00-07 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B06825 .b11822181 mnait u 240401 0 010309 m a u 0 000:001:PDF:b1182218:002006:0:0:0:0:0:0 Abstract--AIT Thesis no.SR-00-7 n mnait mnait mnarc mnarc 22 20 40 Barcode : 30050120694624 CREATED : 2014-04-28 RECORD # : i12792500 LPATRON : 1032896 LCHKIN : 2024-01-31 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 2 TOT RENEW : 0 Barcode : 30050120694608 CREATED : 2015-12-02 RECORD # : i12838925 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160022843 CREATED : 2016-01-04 RECORD # : i12919482 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160022827 CREATED : 2016-01-04 RECORD # : i12919494 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 34211 34211 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.SR-00-07 30050120694624 2026-08-18 09:49:05 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.SR-00-07 30050120694608 2026-08-18 09:49:05 4 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.SR-00-07 30050160022843 2026-08-18 09:49:05 1 2026-08-18 40 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.SR-00-07 30050160022827 2026-08-18 09:49:05 2 2026-08-18 40