Iceberg signatures and detection in SAR images in two test regions of the Weddell Sea, Antarctica

摘要: A pixel-based methodology has been established for automatic identification of icebergs in satellite synthetic aperture radar (SAR) images acquired during different seasons and seaice conditions. This includes, in particular, smaller (longitudinal axis 100m to 18.5 km). Investigations were carried out two test regions located theWeddell Sea, Antarctica, using images of the Envisat Advanced SAR (ASAR) at HH polarization European Remote-sensing Satellite-2 (ERS-2) (VV-polarized). From former, a sequence Image Mode Wide Swath data are available whole 2006. The ERS data around tip Antarctic Peninsula spring summer months years 2000–03. minimum size that could be identified IM was <0.02km2. Radar backscattering coefficients icebergs, sea ice and open water determined separately.We demonstrate error separating from their surroundings (sea or open water) depends on meteorological, oceanographic sea-ice conditions. Also pre-processing (e.g. speckle reduction) influences iceberg recognition. Differences detection accuracy as function season could not be substantiated our sites, but have general taken into account, results other investigations indicate.