Results 211 to 220 of about 768,249 (233)

Circular SAR Imaging Approximated by Spotlight Processing

2006 7th International Symposium on Antennas, Propagation & EM Theory, 2006
In this paper, the differences between circular synthetic aperture radar (CSAR) and traditional linear synthetic aperture radar are briefly analyzed with mathematical model of CSAR introduced. To verify the conclusion that CSAR can get much higher resolution than traditional linear SAR can, even with the same radar parameters, we present an ...
Xiangkun Zhang, Yunhua Zhang, Jingshan Jiang   +2 more
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Research of P band circular polarization SAR

2016 CIE International Conference on Radar (RADAR), 2016
For space-borne P band Synthetic Aperture Radar (SAR) application, an airborne experimental circular&linear polarimetric SAR system is developed, this paper presents the instrument and airborne test result. Compared to linear polarization of P band, circular polarimetric SAR shows remarkable penetration efficacy in tropical jungle foliage covered ...
Zhao Ning, Lu Jiaguo, Ge Jialong, Yao Baidong   +3 more
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Dem Extraction Using C-Band Circular Sar Data

IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019
Circular Synthetic Aperture Radar(CSAR) has become a hotspot with its characteristic of elevation plane resolution and all-aspect observing ability. Digital elevation model (DEM) extraction in urban arears by using single-pass CSAR data without requiring additional knowledge is a subject of interest.
Shanshan Feng, Yun Lin 0002, Wen Hong, Bing Han 0011, Yanping Wang, Yanhui Yang, Wenjie Shen, Fei Teng 0007   +7 more
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Extension of Range Migration Algorithm to Squint Circular SAR Imaging

IEEE Geoscience and Remote Sensing Letters, 2011
This letter presents a new algorithm for squint circular synthetic aperture radar (SAR) (CSAR) imaging, which is an extension of the well-known range migration algorithm. Due to the circular trajectory, the spatial frequency domain data of squint CSAR cannot be readily obtained via fast Fourier transform, as conventional SAR with straight path does ...
Yun Lin 0002, Wen Hong, Weixian Tan, Yirong Wu   +3 more
openaire   +1 more source

Vehicle Layover Removal in Circular SAR Images via ROSL

IEEE Geoscience and Remote Sensing Letters, 2015
Circular synthetic aperture radar (CSAR) has raised interest in both wide-aspect-angle 2-D imaging and 3-D feature reconstruction. As for CSAR 2-D imaging with a 360° aperture, vehicles spotlighted in the scene are depicted with multiview layover, which makes the imagery intuitively less comprehensible.
Zhiguang Zhang, Hong Lei, Zhifeng Lv
openaire   +2 more sources

Analysis of the use of digital elevation model in circular SAR imaging

2017 IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC), 2017
Recently, circular synthetic aperture radar (CSAR) has attracted much attention in the field of high resolution SAR imaging. However, the focusing of CSAR image is affected by the precision of digital elevation model (DEM), which is used for generating imaging grid. In this paper, the effect, which is due to limited precision of DEM, is given in detail.
Leping Chen, Daoxiang An, Xiaotao Huang 0001   +2 more
openaire   +2 more sources

VHF/UHF-band SAR imaging using circular tracks

2012 IEEE International Geoscience and Remote Sensing Symposium, 2012
Low frequency synthetic-aperture radar (SAR) in combination with change detection techniques can be used to search for stationary ground targets. In particular, the method has shown a great potential when vehicle-size objects are obscured by foliage. However. one possibility is to improve the detection capabilities to increase the aperture angle of the
Per-Olov Frölind, Lars M. H. Ulander, Anders Gustavsson, Gunnar Stenstrom   +3 more
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Spatial baseline decorrelation of geosynchronous circular SAR interferometry

Proceedings of 2011 IEEE CIE International Conference on Radar, 2011
With appropriate orbit parameters, the circular SAR imaging mode can be realized on the geosynchronous orbit satellite to get high resolution three-dimensional (3D) image. It would also overcome the coverage and revisit period limitation. Repeat pass inrerferometry for geosynchronous circular SAR (GEOCSAR) could be carried out, comparing images taken ...
null Kou Leilei, null Wang Xiaoqing, null Xiang Maosheng, null Zhu Minhui   +3 more
openaire   +1 more source

Repeat-pass interferometric performance analysis for geosynchronous circular SAR

SPIE Proceedings, 2014
An interferometric performance analysis for repeat-pass geosynchronous circular SAR (GEOCSAR) is presented. The analysis mainly includes the errors caused by the following sources: radar thermal noise, spatial baseline decorrelation, images’ misregistration and the atmospheric effects.
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Fast Imaging Processing of Circular SAR

Journal of Electronics & Information Technology, 2014
Yan Liu, Yuan Wu, Guang-cai Sun, Meng-dao Xing   +3 more
openaire   +1 more source