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Dependence of Waterline Mapping on Radar Frequency Used for SAR Images in Intertidal Areas

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5 Author(s)
Duk-jin Kim ; Geophys. Dept., Manitoba Univ., Winnipeg, Man. ; Wooil M. Moon ; Sang-Eun Park ; Ji-Eun Kim
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Waterline detection in the intertidal areas was investigated through synthetic aperture radar (SAR) images and field measurements. Two valuable facts were found in this letter: 1) A discrepancy of waterlines between L- and P-band airborne SAR images was discovered and investigated through precise global positioning system measurements and the theory of the SAR imaging mechanism. In the intertidal areas having low slopes, the Bragg waves resonant with the radar signal can reside in different depths depending on the radar frequency, with the result that the boundary between water and land can be mapped differently in the respective SAR images. 2) Intertidal areas covered with a water film present low radar backscatter in SAR images, which can cause mislocation of waterlines

Published in:

IEEE Geoscience and Remote Sensing Letters  (Volume:4 ,  Issue: 2 )