极地研究

极地研究 ›› 2015, Vol. 27 ›› Issue (2): 183-193.DOI: 10.13679/j.jdyj.2015.2.183

• 研究论文 • 上一篇    下一篇

基于SIR-C数据的SAR极化特征参数区分海冰与海水的能力评价

张婷1 张杰1 刘眉洁2 张晰1   

  1.  
    1国家海洋局第一海洋研究所，山东 青岛，266061
    2青岛大学, 山东 青岛，266071
  • 收稿日期:2013-10-24 修回日期:2014-06-20 出版日期:2015-06-30 发布日期:2015-06-30
  • 通讯作者: 张婷
  • 基金资助:

    渤海海冰立体监测及高精度预警报技术研究示范;基于主被动遥感的渤海海冰厚度及其相关参数的反演研究

THE CAPACITY EVALUATION THAT USE POLARIZATION CHARACTERISTIC PARAMETERS OF SAR TO DISTINGUISH SEA ICE AND SEAWATER WITH SIR-C DATA

Zhang Ting1, Zhang Jie1, Liu Meijie2, Zhang Xi1   

  1.  
    1The First Institute of Oceanography, SOA, Qingdao 266061，China
    2Qingdao University, Qingdao 266071，China
  • Received:2013-10-24 Revised:2014-06-20 Online:2015-06-30 Published:2015-06-30
  • Contact: Ting ZHANG

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摘要： 利用1994年10月南极区域的6景SIR-C影像，评估了L波段和C波段下13种主要的SAR极化特征参数区分海冰、海水信息的能力。结果表明：L波段下有6种参数能较好地区分海冰和海水，它们是：散射熵、交叉极化比HV/VV、同极化比VV/HH、同极化相关系数ρHH-VV、HV极化后向散射系数、Alpha角；另外，HH极化后向散射系数、交叉极化比HV/HH具有一定的区分海冰和海水的能力；其余5种难以区分海冰和海水。C波段下有4种参数能较好地区分海冰和海水，他们是：散射熵、同极化相关系数ρHH-VV、HV极化后向散射系数、同极化比VV/HH；HH极化后向散射系数、交叉极化比HV/VV、Alpha角和VV极化后向散射系数这4种参数具有一定的区分海冰和海水的能力；其余5种难以区分海冰和海水。且总体来看，L波段区分海冰和海水的能力好于C波段。这为海冰探测的研究提供了有用的参考。

关键词: SIR-C, 极化特征参数区分, 海冰, 海水

Abstract: The sea ice identification capability of 13 kinds of polarization characteristic parameters on L-Band and C-Band using SIR-C images in Antarctica are assessed. Six parameters best distinguish sea ice from seawater on L-band: entropy, cross polarization ratio HV/VV, polarization ratio VV/HH, polarization correlation coefficient ρHH-VV, HV polarization backscatter coefficient, and Alpha angle. Additionally, HH polarization backscatter coefficient and cross-polarization ratio HV/HH differentiate sea ice from seawater, whereas other parameters experience difficulty doing so. Four parameters best distinguish sea ice and seawater on C-band: entropy, polarization correlation coefficient ρHH-VV, HV polarization backscatter coefficient, and polarization ratio VV/HH; HH polarization backscatter coefficient, cross-polarization ratio HV/VV, Alpha angle and VV polarization backscattering coefficient can also differentiate sea ice and seawater, but the remaining five parameters have difficulty doing so. Overall, L-band capabilities distinguish sea ice from seawater better than C-band. This provides a useful reference for sea ice detection studies.

Key words: SIR-C, polarization characteristic parameters, sea ice, seawater