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キーワード:
Arctic engineering; Concentration (process); Detectors; Ice; Imaging systems; Imaging techniques; Light measurement; Ocean currents; Oceanography; Radar; Sea ice; Speed; Synthetic aperture radar; Synthetic apertures; Target drones; Water waves; Wind effects, Global distributions; Ice concentrations; In-homogeneity; Inhomogeneous images; Low wind speed; New parameters; SAR Images; Sea states; Special Sensor Microwave/Imager (SSM/I); Synthetic aperture radar (SAR); Wave modes; Wind speed (WS), Image enhancement
要旨:
In order to classify different types of globally distributed synthetic aperture radar (SAR) wave mode images, which are acquired over the ocean for wind speed and sea state measurements, we develop a new scheme to differentiate images showing ocean wave, sea ice and surface slicks. A new classification parameter has been developed using 1535 SAR wave mode images to differentiate homogeneous and inhomoge-neous images. The new parameter is applied to two years of images. Comparison of the performance using the new parameter and inhomogeneity parameter (IH) defined in [1] are given. In the Arctic area the results of two parameters are compared to Special Sensor Microwave Imager (SSM/I) ice concentration data. The global distribution of inhomogeneous images is analyzed. Inhomegeneity in ice-free SAR images was found to be mainly due to low wind speed.
