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  • 1. Eriksson, Leif E. B.
    et al.
    Borenäs, Karin
    SMHI, Core Services.
    Dierking, Wolfgang
    Berg, Anders
    Santoro, Maurizio
    Pemberton, Per
    SMHI, Research Department, Oceanography.
    Lindh, Henrik
    SMHI, Core Services.
    Karlson, Bengt
    SMHI, Research Department, Oceanography.
    Evaluation of new spaceborne SAR sensors for sea-ice monitoring in the Baltic Sea2010In: CANADIAN JOURNAL OF REMOTE SENSING, ISSN 1712-7971, Vol. 36, p. S56-S73Article in journal (Refereed)
    Abstract [en]

    In this study, synthetic aperture radar (SAR) data from the Advanced Land Observing Satellite (ALOS) and the Envisat, RADARSAT-2, and TerraSAR-X satellites were compared to evaluate their usefulness for sea-ice monitoring in the Baltic Sea. Radar signature characteristics at different frequencies, polarizations, and spatial resolutions are presented for three examples from 2009. C-band like-polarization data, which have been used for operational sea-ice mapping since the early 1990s, serve as a reference. Advantages and disadvantages were identified for the different SAR systems and imaging modes. One conclusion is that cross-polarized data improve the discrimination between sea ice and open water. Another observation is that it is easier to identify ice ridges in L-band data than in images from shorter wavelengths. The information content of X-and C-band images is largely equivalent, whereas L-band data provide complementary information. L-band SAR also seems to be less sensitive to wet snow cover on the ice.

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