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The Cryosphere An interactive open-access journal of the European Geosciences Union
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Volume 9, issue 1
The Cryosphere, 9, 357-366, 2015
https://doi.org/10.5194/tc-9-357-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
The Cryosphere, 9, 357-366, 2015
https://doi.org/10.5194/tc-9-357-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 17 Feb 2015

Research article | 17 Feb 2015

Comparing C- and L-band SAR images for sea ice motion estimation

J. Lehtiranta, S. Siiriä, and J. Karvonen J. Lehtiranta et al.
  • Finnish Meteorological Institute, Marine Research Programme, Helsinki, PB 503, 00101 Finland

Abstract. Pairs of consecutive C-band synthetic-aperture radar (SAR) images are routinely used for sea ice motion estimation. The L-band radar has a fundamentally different character, as its longer wavelength penetrates deeper into sea ice. L-band SAR provides information on the seasonal sea ice inner structure in addition to the surface roughness that dominates C-band images. This is especially useful in the Baltic Sea, which lacks multiyear ice and icebergs, known to be confusing targets for L-band sea ice classification. In this work, L-band SAR images are investigated for sea ice motion estimation using the well-established maximal cross-correlation (MCC) approach. This work provides the first comparison of L-band and C-band SAR images for the purpose of motion estimation. The cross-correlation calculations are hardware accelerated using new OpenCL-based source code, which is made available through the author's web site. It is found that L-band images are preferable for motion estimation over C-band images. It is also shown that motion estimation is possible between a C-band and an L-band image using the maximal cross-correlation technique.

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Satellite radar images are used for detecting and quantifying the motion of sea ice. Traditionally C-band radar images have been used for this purpose. The technique has been shown to work with other frequency bands. This work compares C-band and L-band images for the Baltic Sea. We also show that two images of different bands can be used for sea ice motion estimation.
Satellite radar images are used for detecting and quantifying the motion of sea ice....
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