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基于高度计数据的南极冰水边界识别算法研究
张 婷1, 张 杰1, 王红霞1,2, 张 晰1, 纪永刚1
1.国家海洋局第一海洋研究所;2.中国海洋大学
摘要:
海冰边缘线是南极海冰监测的重要内容之一。本文基于ENVI RA-2 (ENVISAT Radar Altimeter 2)高度计数据开展了南极海冰边缘线提取方法研究。首先根据海冰和海水后向散射系数的不同, 利用其各自方差对两者进行区分, 获得了冰水分界线; 其次通过ENVISAT-ASAR (ENVISAT-AdvancedSynthetic Aperture Radar)数据和冰况图对提取的海冰边缘线的正确性进行了验证; 最后简要分析了误差存在的原因。研究结果表明, 高度计数据在提取大范围海冰边缘线方面具有优势。
关键词:  南极海冰  海冰边缘线  高度计数据  SAR (Synthetic Aperture Radar)
DOI：10.11759/hykx20131031002
分类号:
基金项目:中央级公益性科研院所基本科研业务费专项资金资助项目(GY02-2009G13); 龙计划三期项目(ID: 10510)
Identification of the Antarctic sea ice boundary using altimeter
Abstract:
Sea ice edge is one of the important contents of Antarctic sea ice detection. In this paper, the extraction method of Antarctic sea ice edge was performed using ENVI RA-2 altimeter. The difference between backscattering coefficients of sea ice and sea water could be denoted by respective variance (S2). Sea ice edge was extracted by S2. The resultswerevalidated by those ASAR data and the ice edge code. And its error was analyzed simply. It was indicated that altimeter had an advantage of detecting sea ice edge of large area.
Key words:  Antarctic sea ice  sea ice edge  altimeter  SAR (Synthetic Aperture Radar)
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