摘要
专门论述合成孔径雷达（ＳＡＲ）的辐射分辨特性。首先阐述ＳＡＲ图像像元强度所应遵守的概率分布———χ２分布，然后用不同方法去度量该分布的宽度，由此产生了多种辐射分辨率定义，以指定图像强度时的错误概率为准则来比较各种定义，从而进一步揭示其内涵。还导出了存在系统热噪声时辐射分辨率的定量计算关系式。并论述了辐射分辨特性对ＳＡＲ图像可懂度的影响。
In this paper, the radiometric resolution performance in synthetic aperture radar image are analyzed in detail. It is first explained that the probability distribution of the pixel intensity for the radar image is the χ 2 distribution. Then, the distribution width is measured by different ways, that issue in various radiometric resolution definitions. The various radiometric resolutions and the error probability are also compared with each other. The calculating expresion for the rediometric resolution in the presence of thermal noise is derived. The resolution volume and the interpretability for SAR images is also given.
出处
《上海航天》
1998年第3期9-15,共7页
Aerospace Shanghai
