Science Service System

Summary of Proposal COA0047

TitleInvestigation of intertidal zone using TerraSAR-X
Investigator Won, Joong-Sun - Yonsei University, Earth System Sciences
Team Members
Ph.D. candidate Hong, Sang-Hoon - Sejong University, Department of Geoinformation Engineering
Kim, Sang-Wan - Sejong University, Department of Geoinformation Engineering
Lee, Yoon-Kyung - Sejong University, Department of Geoinformation Engineering
Choi, Jae-Won - Sejong University, Department of Geoinformation Engineering
Won, Joong-Sun - Sejong University, Department of Geoinformation Engineering
SummaryIntertidal zone is a buffer zone between landmass and ocean as well as invaluable from geologic, environmental and ecological aspects. To observe active changes in the intertidal zones, sedimentation process and biomass are needed to be understood. Optic remote sensing is proven to be effective for intertidal zone monitoring in terms of both erosion/sedimentation process and blooming microphytobenthos. However, data acquisition by using optic remote sensing sensors is seriously limited due to tidal and weather conditions. High resolution SAR is complementary to optic remote sensing in the intertidal zone. Although microwave is not suitable for observing microphytobenthos, surface characteristics of intertidal zone can be understood by SAR system. Concerning surface features include bottom surface topography, intertidal channels and creeks, grain size and surface water. Main objectives of the research are feasibility studies of TerraSAR-X on the intertidal zone monitoring. To achieve the goals, investigations include: 1) waterline characteristics in high resolution X-band images; 2) intertidal channels and creeks mapping; 3) backscattering intensity and (dual) polarimetric signatures with respect to the surface parameters such as grain size, surface roughness, distance to creeks and remnant surface water; and 4) coherence of interferometric pairs. Since TerraSAR-X has a capability of four different imaging modes, the effectiveness of each mode will also be investigated. The results are to be compared with those obtained by ENVISAT and ERS C-band ASAR, and ALOS L-band PALSAR. Bottom surface of the intertidal zone is generally very smooth with respect to L- or C-band. X-band would better image the surface conditions than other bands. ATI experimental mode data are also to be reviewed for water body discrimination if data are available in later stage of the research. Test sites include the west coast of Korea and the German Wadden Sea.

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