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Evaluation of new spaceborne SAR sensors for sea-ice monitoring in the Baltic Sea

Leif E.B. Eriksson (Institutionen för rymd- och geovetenskap, Radarfjärranalys) ; Karin Borenäs ; W. Dierking ; Anders Berg (Institutionen för rymd- och geovetenskap, Radarfjärranalys) ; M. Santoro ; Per Pemberton ; Henrik Lindh ; Bengt Karlson
Canadian Journal of Remote Sensing (0703-8992). Vol. 36 (2010), 1, p. S56-S73.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Sea-ice, SAR, Gulf of Bothnia

Denna post skapades 2010-09-10. Senast ändrad 2015-07-02.
CPL Pubid: 126061


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