航天飞机成像雷达海面风矢量观测研究——以1994年4月南中国海试验区为例

王超; 潘广东

doi:10.11834/jrs.20000110

浏览量 : 0 下载量: 790 CSCD: 7

PDF
导出
分享
收藏
专辑

航天飞机成像雷达海面风矢量观测研究——以1994年4月南中国海试验区为例
Research on Wind Vector Observation from SIR C/X SAR Data: Case Study of SIR C/X SAR Experiment over South China Sea
2000年第1期页码：51-54
纸质出版：2000
DOI： 10.11834/jrs.20000110
稿件说明：

移动端阅览

[1]王超,潘广东.航天飞机成像雷达海面风矢量观测研究——以1994年4月南中国海试验区为例[J].遥感学报,2000(01):51-54. DOI： 10.11834/jrs.20000110.

WANG Chao, PAN Guang dong. Research on Wind Vector Observation from SIR C/X SAR Data: Case Study of SIR C/X SAR Experiment over South China Sea[J]. Journal of Remote Sensing, 2000, (1): 51-54. DOI： 10.11834/jrs.20000110.

摘要

海洋雷达后向散射回波主要来自短重力波的Ｂｒａｇｇ散射，这种散射与海面风场信息、边界层涡旋等密切相关。因此，可以从雷达散射截面反演风场信息。对１９９４年４月航天飞机成像雷达（ＳＩＲＣ／ＸＳＡＲ）获取的南中国海合成孔径雷达（ＳＡＲ）图像进行了分析研究。利用ＳＩＲＣ数据，从ＳＡＲ图像谱提取了风向；根据ＣＭＯＤ４模型，从Ｃ波段雷达后向散射系数反演风速；利用双尺度散射模型对反演的风速进行了对比分析。结果表明，从ＳＩＲＣ雷达数据可以反演海面风矢量，星载ＳＡＲ是提取海面风场信息的有效技术手段之一。

Abstract

The radar backscattering from the ocean surface results mainly from the Bragg scattering caused by the short gravity waves

which are related to wind vector

boundary layer phenomena

etc. Hence

it is reasonable to retrieve the wind field information from the radar cross section of the ocean surface. Much work has been done on deriving the ocean spectra from SAR imagery and wind speed from radar cross section. In this paper

the （SIR C）/（X SAR） data acquired in April

1994 are analyzed over the South China Sea. Firstly

the SAR image spectra are calculated

and the wind direction is estimated. The wind speed is derived using the sigma naught of the C band data with the CMOD4 model. The results are validated with the composite model. It is shown that SAR is one of useful tools for the retrieval of comprehensive wind information over the ocean.

关键词

Keywords

references

文章被引用时，请邮件提醒。

提交

改进HOT法的Landsat 8 OLI遥感影像雾霾及薄云去除