The modeling and simulation of SAR clutter is important for Radar system design and signal processing. This paper
deals with this problem in high-resolution ground clutter. Based on the theory of clutter modeling, comparisons between
different probability distribution function (PDF) models and autocorrelation function (ACF) models are made, and the
best model are found taking TerraSAR-X data as example. Finally simulation is made through Memoryless Non-Linear
Transformation (MNLT) method based on this best fitting model. The result reveals that a mix of Rayleigh and
LogNormal distribution can fit homogeneous, heterogeneous and extremely heterogeneous clutter regions. The
simulation shows that MNLT method works well, and PDF and ACF model can represent SAR clutter well based on the
homogeneity of texture.
The remote sensing can help monitoring the nature scene, so it is very useful for agriculture engineering. This paper
presents a method to simulate the SAR image of nature scene by the ray tracing and statistical method. The scene is
composed of the tree and grass which would be modeled by this two method. The result shows that this method can
simulate the SAR image effectively.
The devastating Wenchuan Earthquake occurred in Sichuan Province, Southwestern China, with a magnitude of 8.0 on May 12, 2008. Most buildings along the seismic zone were ruined, resulting in infrastructure damage to factories, traffic facilities and power supplies. The earthquake also triggered geological disasters, such as landslides, debris flow, landslide lakes, etc. During the rescue campaign the remote sensing aircrafts of the Chinese Academy of Sciences (CAS), equipped with synthetic aperture radar (SAR) and optical sensors, flew over the disaster area and acquired many high resolution airborne SAR images. We first describe the basic characteristics of SAR imagery. The SAR images of buildings are simulated, and the backscattering mechanism of the buildings is analyzed. Finally, the various disaster phenomena are described and analyzed in the high resolution airborne SAR images. It is shown that certain phenomena of ruins could be identified clearly in high resolution SAR images in proper imaging conditions, while the functional destruction is quite difficult to detect. With calibrated data, the polarmetric SAR interferometry could be used to analyze the scattering mechanism and 3D distribution of the scattering center, which are redound to earthquake damage assessment.