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This paper presents a rotary table-mounted synthetic aperture radar (SAR) system with linear frequency modulated continuous wave (LFMCW) for target detection. A SAR imaging algorithm and a spatial processing procedure are combined to detect drones at unknown positions. The beat signal at the receiver is used to alleviate the high-speed sampling and the high resolution requirements for signals with...
The characterization and understanding of microwave remote sensing image quality is essential to the monitoring performance of sensors and the proper usage of the acquired image. Point targets (e.g., passive corner reflectors and active transponders) have been widely used for microwave image resolution analysis. However, the analysis results based on point targets do not include the effects of speckle...
The interpretation of Synthetic Aperture Radar (SAR) images of dynamic ocean scene is extremely complex, owing to the comprehensive mechanisms of ocean SAR imaging. Along-track Interferometric SAR (AT-InSAR) technique provides us a convenient tool to cope with these problems. But the lack of in-situ data of AT-InSAR is one of the most restricted factors for the further study of this technique. Simulation...
The shadow is a particular phenomenon in SAR images, inflecting some information of the target. However, the shadow edges are blurred in SAR images. Thus, we analyze the causes for the blurring phenomenon of shadow edges in terms of SAR imaging algorithms in this paper. Taking the range Doppler algorithm for example, we conduct four simulation experiments to compensate for different processing steps...
The boundary of the shadow region is blurred in SAR images for the moving of the radar during the collection of data. This phenomenon gets particularly obvious for tall and narrow targets in High Resolution (HR) SAR images. In this work, based on the Height-Variant Phase Compensation Algorithm (HVPC) according to the property of the target like poles, an approach for shadow enhancement about tall...
Trihedral corner reflectors have been widely used as standard point targets for synthetic aperture radar (SAR) calibration. The RCS accuracy of the trihedral corner reflector is vital especially for future high-precision SAR radiometric calibration. In order to reduce the interaction between corner reflector and the ground on which the reflector deployed, and also reduce the edge diffraction through...
Retrieving forest parameters, such as forest height, biomass from polarimetric and interferometric SAR (Pol-InSAR) images has been investigated and well demonstrated via airborne experiments for different types of forest. Terrain slope is a factor that always prevents the wide application of SAR technique due to its slant-looking imaging geometry. It induces changes of backscattering intensity, polarimetric...
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