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Wooil M. Moon, The University of Manitoba (Canada)
Duk-Jin Kim, Korea Aerospace Research Institute (Republic of Korea)
Jun-su Kim , Seoul National University (Republic of Korea)
Ji-Eun Kim, Seoul National University (Republic of Korea)
Sang-Eun Park, Seoul National University (Republic of Korea)
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Multi-frequency and fully polarimetric airborne Synthetic Aperture Radar (SAR) survey is used to study the radar polarimetric properties and to find waterline location in the intertidal zone on the south coast of the Korea. The south western coastal zones of Korean peninsula are well known for their large tidal ranges and vast expanses of intertidal flats. Polarimetric analysis (Entropy, Alpha and circular polarization correlation coefficient) and numerical model simulation (IEM and composite surface model) are carried out to investigate the radar backscattering properties of the inter-tidal flats.
Several particular characteristics of the inter-tidal flat (especially in mudflat) are observed:
1) the mudflat has very low radar backscattering in HH and VV and it does not follow the rough surface scattering. However,
2) the mudflat has high entropy and volume scattering properties and the surface roughness parameters can be estimated from the polarimetric coherence between the left-left and right-right circular polarization. Moreover,
3) the considerable discrepancy in the waterlines imaged between L-band and P-band POLSAR data is observed in the area.
Fully polarimetric SAR provides us with considerably more information on the geological properties of intertidal flats than single polarization SAR data sets, although we will need more case studies with multiple frequency polarimetric SAR data.
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