| 摘要: |
| 地球物理模型函数是一种常被用于同极化合成孔径雷达（synthetic aperture radar，SAR）的风场反演方法。在使用该方法提取SAR数据的风速时，需要将风向作为输入信息，这导致反演风速的精度受风向精度的影响，且使SAR风场反演无法独立完成。为了解决这些问题，通过数值模拟获取仿真的组网SAR卫星数据，3颗SAR同时以不同的入射角观测同一海面。针对仿真的组网SAR卫星数据，发展了一种风场优化反演方法，可以在不输入风向的前提下反演风速，提供参考风向还可以进一步提高风场反演的精度。 |
| 关键词: 组网卫星 合成孔径雷达 风场反演 |
| DOI：10.11759/hykx20201105003 |
| 分类号:TP722.6 |
| 基金项目:国家重点研发计划项目（2017YFC1405600） |
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| Wind field optimization inversion method for C-band networked SAR satellite |
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WAN Yong1, SHI Xiao-lei2, DAI Yong-shou1
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1.College of Oceanography and Space Informatics, China University of Petroleum, Qingdao 266580, China;2.College of Control Science and Engineering, China University of Petroleum, Qingdao 266580, China
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| Abstract: |
| The geophysical model function is a wind field retrieval method often used in co-polarimetric synthetic aperture radars (SARs). When using this method to extract wind speed from SAR data, wind direction should be used as the input information. Thus, the wind speed retrieval accuracy is affected by the wind direction accuracy, and the SAR wind field retrieval cannot be completed independently. To solve these problems, simulated SAR data of networked satellites are obtained through numerical simulation, and the same sea surface is observed at different incident angles through three SARs simultaneously. A wind field optimal inversion method is developed for the simulated networked SAR satellite data. Through this method, wind speed can be retrieved without inputting wind direction, and wind field retrieval accuracy can be further improved by providing the reference wind direction. |
| Key words: networked satellite synthetic aperture radar wind field inversion |
