書誌事項
- タイトル別名
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- A Sea Ice Study Using SAR Data in the Sea of Okhotsk
- ゴウセイ カイコウ レーダ ニ ヨル オホーツクカイ ノ カイヒョウ ケンキュ
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From the overall analyses of the data from Synthetic Aperture Radars (SARs) on Japanese Earth Resource Satellite-1 (JERS-1/JSAR) and ESA Remote sensing Satellite-1 (ERS-1/AMI), the data from the high resolution optical sensor on French earth observation satellite (SPOT), and the truth data acquired on the ground, the interesting results about the ice cover on Lake Saroma and the sea ice in the Sea of Okhotsk were obtained as follows : <BR>(1) Backscatter ranges for the ice cover on Lake Saroma were -10.2 to -5.0 dB for AMI and -17.7 to -13.6dB for JSAR at the sampling sites. The ice on Lake Saroma was classified byusing HRV data and the visual observation from the boat, then the backscatter intensity for each ice type was confirmed.<BR>(2) A method for making a mosaic image using SAR data was developed and demonstrated. Comparing JSAR and AMI mosaic images at the same area, it was found that JSAR can clearly discriminate the sea ice and the open water, while AMI cannot distinguish them. The reason of this difference is supposed to be difference of frequency and incidence angle.<BR>(3) When the ice becomes thicker, the backscattering intensity decreases in AMI data. It is estimated that the backscatter changes corresponding to the dielectric constant for ice, which is related to the ice surface temperature.
収録刊行物
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- 地学雑誌
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地学雑誌 103 (6), 674-683, 1994
公益社団法人 東京地学協会
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詳細情報 詳細情報について
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- CRID
- 1390282679206302464
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- NII論文ID
- 110000379728
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- NII書誌ID
- AN00322536
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- ISSN
- 18840884
- 0022135X
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- NDL書誌ID
- 3595687
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