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http://dx.doi.org/10.11108/kagis.2021.24.4.041

Extraction of Water Body Area using Micro Satellite SAR: A Case Study of the Daecheng Dam of South korea  

PARK, Jongsoo (K-water Institute Water Resources Satellite Research Center)
KANG, Ki-Mook (K-water Institute Water Resources Satellite Research Center)
HWANG, Eui-Ho (K-water Institute Water Resources Satellite Research Center)
Publication Information
Journal of the Korean Association of Geographic Information Studies / v.24, no.4, 2021 , pp. 41-54 More about this Journal
Abstract
It is very essential to estimate the water body area using remote exploration for water resource management, analysis and prediction of water disaster damage. Hydrophysical detection using satellites has been mainly performed on large satellites equipped with optical and SAR sensors. However, due to the long repeat cycle, there is a limitation that timely utilization is impossible in the event of a disaster/disaster. With the recent active development of Micro satellites, it has served as an opportunity to overcome the limitations of time resolution centered on existing large satellites. The Micro satellites currently in active operation are ICEYE in Finland and Capella satellites in the United States, and are operated in the form of clusters for earth observation purposes. Due to clustering operation, it has a short revisit cycle and high resolution and has the advantage of being able to observe regardless of weather or day and night with the SAR sensor mounted. In this study, the operation status and characteristics of micro satellites were described, and the water area estimation technology optimized for micro SAR satellite images was applied to the Daecheong Dam basin on the Korean Peninsula. In addition, accuracy verification was performed based on the reference value of the water generated from the optical satellite Sentinel-2 satellite as a reference. In the case of the Capella satellite, the smallest difference in area was shown, and it was confirmed that all three images showed high correlation. Through the results of this study, it was confirmed that despite the low NESZ of Micro satellites, it is possible to estimate the water area, and it is believed that the limitations of water resource/water disaster monitoring using existing large SAR satellites can be overcome.
Keywords
Micro Satellite; SAR; Water Body area; Constellation; Water-related disaster;
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