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首页> 外文会议>IEEE International Geoscience and Remote Sensing Symposium >DEPENDENCY OF BACKSCATTERING F ROM OCEAN SURFACE ON WIND DIREC TION BY USING AIRBORNE SAR - LOW WIND SPEED CASE
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DEPENDENCY OF BACKSCATTERING F ROM OCEAN SURFACE ON WIND DIREC TION BY USING AIRBORNE SAR - LOW WIND SPEED CASE

机译：使用空机SAR - 低风速壳体反向散射F ROM海洋表面对风的依赖性 - 低风速

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摘要

The dependency of backscattering from ocean surface on wind di- rection under low wind speed ( 5m1s) is analyzed using observation data by an airborne dual-frequency SAR in the L- and X-bands. The NRCS differencebetween up- and down-wind conditions depends on the incidence angle in the X-band HH polarization, though that in the VV polarization, the NRCS difference is almost zero. Moreover, the NRCS difference between parallel- and cross-wind conditions in the VV polarization is greater than that in the HH polarization. Though the dependency of the NRCS in the L-band on the wind direction is smaller than that in the X-band, the NRCSs in the L-band cross po- larizations under the cross-wind condition is greater than that under the parallel-wind condition. The polarizatuion ratio (PR) difference between up- and down-wind directions depends on the incidence an- gle as the incidence angle dependency in the X-band HH polariza- tion. The dependency of the PR in the L-band on wind direction is also weaker than that in the X-band. The results suggest the possi- bility of ocean wind measurement using the polarimetric SAR in the X-band and/or using the dual-frequency SAR.
机译：利用L X和X波段的空气传播数据分析了低风速（5M1S）在低风速（5M1s）下的海面上反向散射的依赖性。 NRCS偏差上的上下风条件取决于X波段HH极化中的入射角，尽管在VV偏振中，NRC差值几乎为零。此外，VV偏振中的并联和交叉风条件之间的NRC差异大于HH极化中的横向条件。尽管NRC在风向上的L波段中的依赖性小于X波段中的依赖性，但在横向风条件下的L波段交叉PO-中的NRCS大于并联下的NRC风条件。上下风向与下风方向之间的偏振率（PR）差异取决于X波段HH极化的入射角依赖性的入射α。在风向上的L波段中PR的依赖性也比X波段更弱。结果表明，在X波段中的偏振SAR和/或使用双频SAR中的偏振SAR可能有可能。

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