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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >The Stability of UWB Low-Frequency SAR Images
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The Stability of UWB Low-Frequency SAR Images

机译：UWB低频SAR图像的稳定性

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摘要

This letter presents an analysis of prefiltered clutter ultrawideband (UWB) very high frequency synthetic aperture radar (SAR) images. The image data are reorganized into subvectors based on the observation of the image-pair magnitude samples. Based on this approach, we present a statistical description of the SAR clutter obtained by the subtraction between two real SAR images. The statistical analysis based on bivariate distribution data organized into different intervals of magnitude can be an important tool to further understand the properties of the backscattered signal for low-frequency SAR images. In this letter, it is found that, for “good” image pairs, the subtracted image has Gaussian distributed clutter backscattering and that the noise mainly consists of the thermal noise and, therefore, speckle noise does not have to be considered. This is a consequence of the stable backscattering for a UWB low-frequency SAR system.
机译：这封信介绍了对预滤波杂波超宽带（UWB）甚高频合成孔径雷达（SAR）图像的分析。基于对图像对幅度样本的观察，图像数据被重新组织为子向量。基于此方法，我们提出了通过对两个真实SAR图像进行减法运算得到的SAR杂波的统计描述。基于组织成不同幅度区间的双变量分布数据的统计分析，可以成为进一步了解低频SAR图像后向散射信号特性的重要工具。在这封信中，发现对于“良好”图像对，相减后的图像具有高斯分布的杂波后向散射，并且噪声主要由热噪声组成，因此不必考虑斑点噪声。这是UWB低频SAR系统稳定反向散射的结果。

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