Evaluation of new spaceborne SAR sensors for sea-ice monitoring in the Baltic Sea
Artikel i vetenskaplig tidskrift, 2010

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.

SAR

Sea-ice

Gulf of Bothnia

Författare

Leif Eriksson

Chalmers, Rymd- och geovetenskap, Radarfjärranalys

Karin Borenäs

Swedish Meteorological and Hydrological Institute

W. Dierking

Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung

Anders Berg

Chalmers, Rymd- och geovetenskap, Radarfjärranalys

M. Santoro

Gamma Remote Sensing

Per Pemberton

Swedish Meteorological and Hydrological Institute

Henrik Lindh

Swedish Meteorological and Hydrological Institute

Bengt Karlson

Swedish Meteorological and Hydrological Institute

Canadian journal of remote sensing

0703-8992 (ISSN)

Vol. 36 S56-S73

Ämneskategorier

Rymd- och flygteknik

Jordbruksvetenskap

Oceanografi, hydrologi, vattenresurser

DOI

10.5589/m10-020