中国空间科学技术

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星载 ScanSAR 特性研究

袁孝康   

  1. 上海卫星工程研究所
  • 发布日期:1998-08-25

PERFORMANCE OF SATELLITE BORNE ScanSAR

Yuan Xiaokang (Shanghai Institute of Satellite Engineering,Shanghai 200240)   

  • Published:1998-08-25

摘要： 论述了星载波束扫描合成孔径雷达（ＳｃａｎＳＡＲ）的扫描覆盖特性，指出在满足观测带远端模糊性约束条件下，最大观测带宽度与雷达波长和实际天线孔径的形状无关；阐述了观测带宽度与雷达分辨率、天线面积、发射功率和回波数据率等参数之间的约束关系；给出了数值计算例子。

关键词: 天线波束扫描, 合成孔径雷达, 数值计算, 性能分析

Abstract: In this paper,the properties of scanning coverage for a satellite borne ScanSAR have been analyzed in detail.It is shown that the maximun width of observing zone for a satellite borne ScanSAR is independent of radar wavelength and real shape of antenna aperture if the restraint conditions for far range ambiguity are met in design.The antenna design shall be trade off between allowable size and beam number.The average and peak transmitting power of satellite borne ScanSAR and quantitative relationship of restraint condition of ambiguity are explained.The numerical examples about performance computation of a satelliee borne ScanSAR are given finally.