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A study of sea ice in the Sea of Okhotsk with SAR data

Published online by Cambridge University Press:  27 October 2009

Hiroyuki Wakabayashi ,
Kazuyoshi Hirano ,
Fumihiko Nishio ,
Masaaki Aota  and
Shuhei Takahashi
Hiroyuki Wakabayashi
Affiliation:
National Space Development Agency of Japan, Earth Observation Satellite Department, 1-29-6 Hamamatsu-cho, Minato-ku, Tokyo 105, Japan
Kazuyoshi Hirano
Affiliation:
Remote Sensing Technology Center, 1401 Ohashi, Hatoyama, Hiki, Saitama 350-03, Japan
Fumihiko Nishio
Affiliation:
Hokkaido University of Education, Kushiro, 1-15-55 Shiroyama, Kushiro, Hokkaido 085, Japan
Masaaki Aota
Affiliation:
Sea Ice Research Laboratory, Hokkaido University, 6-4-26 Minamigaoka, Mombetsu, Hokkaido 094, Japan
Shuhei Takahashi
Affiliation:
Kitami Institute of Technology, 165 Koencho, Kitami, Hokkaido 090, Japan
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Abstract

The ‘Okhotsk Sea Ice Observation Experiment’ 93' was carried out in February 1993 in the southern part of the Sea of Okhotsk and in Lake Saroma, Japan. The aim of the experiment was to investigate how effectively Synthetic Aperture Radar (SAR) can monitor sea ice in this region. Satellite data from JERS-1/SAR (J-SAR), ERS-1/SAR CESAR), and SPOT-2/HRV, as well as data from airborne sensors and ground-truth data, were utilized. From the overall analysis of those data, several results were obtained. First, the range of backscatter of the ice cover on Lake Saroma was determined, as well as a relation between ice type and backscatter. Second, a method for making SAR mosaic images was developed to monitor sea ice over a wide area. When comparing J-SAR(L-band) data with E-SAR(C-band) data acquired simultaneously over the same area, J-SAR proved to be superior to E-SAR in showing the existence of sea ice. And third, it was confirmed that the backscatter of E-SAR was correlated to the ice thickness, which may be explained by the relation between the backscatter and the ice-surface temperature.

Type
Articles
Information
Polar Record , Volume 31 , Issue 178 , July 1995 , pp. 305 - 314
Copyright
Copyright © Cambridge University Press 1995

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