高分三号卫星ATI模式海表面流场测量性能分析

发布时间：2018-12-06 11:35

【摘要】：顺轨干涉合成孔径雷达(Along-Track Interferometric Synthetic Aperture Radar,ATI-SAR)是获取高分辨率海表面流场的一种有效手段。文章首先分析了ATI-SAR海表面流场测量精度的影响因素(极化方式、入射角、有效顺轨基线、海面风场),给出了适用于ATI海表面流场测量的雷达系统参数,然后基于仿真实验对高分三号卫星海表面流场测量性能进行了研究。由于单星顺轨干涉基线长度有限影响流场测量精度,而在双星编队模式下可以使测量性能达到最佳,因此最后分析了双星编队方式下ATI海表面流场干涉基线选取范围,可为双星编队海流监测系统设计提供参考。
[Abstract]:Orbit Interferometric synthetic Aperture Radar (Along-Track Interferometric Synthetic Aperture Radar,ATI-SAR) is an effective method to obtain high resolution sea surface flow field. In this paper, the factors influencing the measurement accuracy of ATI-SAR sea surface current field (polarization mode, incident angle, effective orbit baseline, sea surface wind field) are analyzed, and the radar system parameters suitable for ATI sea surface current field measurement are given. Then based on the simulation experiment, the measurement performance of sea surface current field of Gaofen 3 satellite is studied. Because the limited length of the interference baseline affects the measurement accuracy of the flow field, and the measurement performance can be optimized in the two-star formation mode, the selection range of the interference baseline of the ATI sea surface flow field in the two-star formation mode is analyzed at the end of the paper. It can provide reference for the design of the current monitoring system of the twin-star formation.
【作者单位】：国家卫星海洋应用中心;国防科技大学;北京理工大学;
【基金】：高分辨率对地观测重大专项(No.12-Y20A15-9001-15/16)
【分类号】：P715.6;V474

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