Results 11 to 20 of about 83,591 (207)

Adaptive reconstruction for azimuth signal of multichannel HRWS SAR imaging system

EURASIP Journal on Advances in Signal Processing, 2018
The reconstruction of azimuth signal in multichannel synthetic aperture radar (SAR) for high-resolution and wide-swath (HRWS) imaging requires exact steering vectors.
Linjian Zhang, Yesheng Gao, Xingzhao Liu
doaj   +2 more sources

Azimuth Ambiguity Suppression in SAR Images Based on Compressive Sensing Recovery Algorithm

Leida xuebao, 2016
Azimuth ambiguities appear widely throughout spaceborne Synthetic Aperture Radar (SAR) images. If the ambiguous energy is relatively strong, a large number of brilliant areas or points will emerge, which may be erroneously judged as actual targets.
Xiao Peng, Wu Youming, Yu Ze, Li Chunsheng   +3 more
doaj   +2 more sources

Ambiguity Suppression by Azimuth Phase Coding in Multichannel SAR Systems [PDF]

, 2011
The Azimuth Phase Coding (APC) technique, proposed to suppress range ambiguities in conventional SAR systems, stands out for its low implementation complexity and its effectiveness for point and distributed ambiguities.
Bordoni, Federica, Federica Bordoni, Younis, Marwan, Krieger, Gerhard, Marwan Younis, Gerhard Krieger   +5 more
core   +1 more source

Surface Current Retrieval From TerraSAR-X Data Using Doppler Measurements [PDF]

, 2010
The purpose of this paper is to investigate the estimation of surface currents directly on stripmap TerraSAR-X data, as an alternative to Along Track Interferometry.
Thomas Fritz, Breit, Helko, Hartmut Runge, Rossi, Cristian, Fritz, Thomas, Helko Breit, Runge, Hartmut, Cristian Rossi   +7 more
core   +1 more source

Extended Subaperture Imaging Method for Airborne Low Frequency Ultrawideband SAR Data

Sensors, 2019
The subaperture processing is one of the essential strategies for low frequency ultrawideband synthetic aperture radar (LF UWB SAR) imaging, especially for the real-time LF UWB SAR imaging because it can improve the parallelization of the imaging ...
Daoxiang An, Wu Wang, Leping Chen
doaj   +1 more source

High-Resolution Wide-Swath Ambiguous Synthetic Aperture Radar Modes for Ship Monitoring

Remote Sensing, 2022
This paper proposes two high-resolution, wide-swath synthetic aperture radar (SAR) acquisition modes for ship monitoring that tolerate ambiguities and do not require digital beamforming. Both modes, referred to as the low pulse repetition frequency (PRF)
Nertjana Ustalli, Michelangelo Villano
doaj   +1 more source

On the Use of Cross-Correlation between Volume Scattering and Helix Scattering from Polarimetric SAR Data for the Improvement of Ship Detection

Remote Sensing, 2016
Synthetic Aperture Radar (SAR) ship detection is an important maritime application. However, azimuth ambiguities caused by the finite sampling of the Doppler spectrum are often visible in SAR images and are always mistaken as ships by classic detection ...
Jujie Wei, Jixian Zhang, Guoman Huang, Zheng Zhao   +3 more
doaj   +1 more source

Channel Phase Calibration for High-Resolution and Wide-Swath SAR Imaging with Doppler Spectrum Sharpness Optimization

Sensors, 2022
Channel phase calibration is a crucial issue in high resolution and wide swath (HRWS) imagery with azimuth multi-channel synthetic aperture radar (SAR) systems.
Man Zhang, Sha Huan, Zeya Zhao, Zhibin Wang   +3 more
doaj   +1 more source

Azimuth-Resolved Circular Dichroism of Metamaterials

, 2022
Chiral optical metamaterials have attracted a great deal of attention due to their intriguing properties with respect to fundamental research and practical applications.
Shuliang Ren, Ping-Heng Tan (1925491), Chao Shen (520343), Jun Zhang (48506), Nai Jiang, Fangrong Hu, Kaixuan Xu, Houzhi Zheng, Ping-Heng Tan, Jun Zhang, Shuliang Ren (7901615), Changji Liu, Nai Jiang (12084770), Chao Shen, Changji Liu (12084767), Xinlong Xu, Houzhi Zheng (12084776), Kaixuan Xu (8313465), Fangrong Hu (12084773), Xinlong Xu (1818805)   +19 more
core   +1 more source

First Spaceborne SAR-GMTI Experimental Results for the Chinese Gaofen-3 Dual-Channel SAR Sensor

Sensors, 2017
In spaceborne synthetic aperture radar (SAR) sensors, it is a challenging task to detect ground slow-moving targets against strong clutter background with limited spatial channels and restricted pulse repetition frequency (PRF).
Chenghao Wang, Guisheng Liao, Qingjun Zhang   +2 more
doaj   +1 more source