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- Title
Polar Sea Ice Monitoring Using HY-2A Scatterometer Measurements.
- Authors
Mingming Li; Chaofang Zhao; Yong Zhao; Zhixiong Wang; Lijian Shi
- Abstract
A sea ice detection algorithm based on Fisher's linear discriminant analysis is developed to segment sea ice and open water for the Ku-band scatterometer onboard the China's Hai Yang 2A Satellite (HY-2A/SCAT). Residual classification errors are reduced through image erosion/dilation techniques and sea ice growth/retreat constraint methods. The arctic sea-ice-type classification is estimated via a time-dependent threshold derived from the annual backscatter trends based on previous HY-2A/SCAT derived sea ice extent. The extent and edge of the sea ice obtained in this study is compared with the Special Sensor Microwave Imager/Sounder (SSMIS) sea ice concentration data and the Sentinel-1 SAR imagery for verification, respectively. Meanwhile, the classified sea ice type is compared with a multi-sensor sea ice type product based on data from the Advanced Scatterometer (ASCAT) and SSMIS. Results show that HY-2A/SCAT is powerful in providing sea ice extent and type information, while differences in the sensitivities of active/passive products are found. In addition, HY-2A/SCAT derived sea ice products are also proved to be valuable complements for existing polar sea ice data products.
- Subjects
SEA ice; SCATTERING (Physics); DISCRIMINANT analysis; CLASSIFICATION algorithms; SYNTHETIC aperture radar
- Publication
Remote Sensing, 2016, Vol 8, Issue 8, p688
- ISSN
2072-4292
- Publication type
Article
- DOI
10.3390/rs8080688