Journal of Marine Sciences ›› 2014, Vol. 32 ›› Issue (2): 23-34.DOI: 10.3969/j.issn.1001-909X.2014.02.003

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Comparison for the visibility of the SAR polarization characteristics and σ0 images of internal waves

LI Lu-jing1, MENG Jun-min*2, ZHANG Xi2, SUN Li-na2   

  1. 1. School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin 150000, China;
    2. The First Institute of Oceanography, SOA, Qingdao 266061, China
  • Received:2013-10-15 Revised:2014-04-01 Online:2014-06-15 Published:2022-11-25

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Abstract: Comparison for the visibility of 11 SAR polarization characteristics and σ0 images of internal waves were performed by using ALOS PALSAR quad-polarization SAR images. In SAR polarization characteristics of internal waves, the characteristic of Lambda values is the most obvious and then the characteristics of Entropy and Alpha are next. Compared with the images of σ0, the visibility of Lambda values for internal waves is better than that of copar-polarization σ0 images. For the Entropy and Alpha, the visibility of internal waves propagating along the range direction is better than that of the copar-polarization σ0 images; the visibility of internal waves propagating along the azimuth direction is slightly worse than that of the copar-polarization σ0 images. The characteristics of Entropy and Alpha are better than those of cross polarization σ0 images. The characteristics of internal waves for the images of the HH/VV, normalized coefficient of circular polarization, and Beta are not obvious; the characteristics of internal waves for the images of the HH/HV, VV/VH, Gamma, Delta, and Anisotropic index are fuzzy and internal waves can't be identified in these images.

Key words: ALOS PALSAR, polarization SAR, polarization characteristics, internal waves

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