A study of the feasibility of using KOMPSAT-5 SAR data to map sea ice in the Chukchi Sea in late summer
| Autor: | Hyun-Cheol Kim, Sang-Hoon Hong, Tae-Byeong Chae, Hae-Jin Choi, Hyangsun Han |
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| Rok vydání: | 2017 |
| Předmět: |
Synthetic aperture radar
geography geography.geographical_feature_category 010504 meteorology & atmospheric sciences 0211 other engineering and technologies Mode (statistics) 02 engineering and technology 01 natural sciences Arctic ice pack Late summer Arctic Climatology Sea ice thickness Earth and Planetary Sciences (miscellaneous) Sea ice Electrical and Electronic Engineering Sea ice concentration Geology 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | Remote Sensing Letters. 8:468-477 |
| ISSN: | 2150-7058 2150-704X |
| Popis: | In this study, a sea ice mapping model based on Random Forest (RF), a rule-based machine learning approach, has been developed for the Korea Multi-Purpose Satellite-5 (KOMPSAT-5) Synthetic Aperture Radar (SAR) data in Enhanced Wide swath mode obtained from 6 August to 9 September 2015 in the Chukchi Sea. A total of 12 texture features derived from backscattering intensity and the gray-level co-occurrence matrix were used as input variables for sea ice mapping. The RF model produced a sea ice map with a grid spacing of 125 m, demonstrating excellent performance in the classification of sea ice and open water with an overall accuracy of 99.2% and a kappa coefficient of 98.5%. Sea ice concentration (SIC) retrieved from the RF-derived sea ice maps was compared with that from ice charts. The mean and median values of the differences between the SICs derived from the RF model and the ice charts were −8.85% and −8.38%, respectively. Such difference was attributed to both the uncertainty in the ice charts... |
| Databáze: | OpenAIRE |
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