Results 41 to 50 of about 156 (95)

Observation and Coordination Needs for Current, Near‐Future, and Next Generation Earth‐Observing SAR Systems

Earth and Space Science, Volume 13, Issue 5, May 2026.
Abstract This paper summarizes an evaluation by experts of how coordination of Earth‐observing Synthetic Aperture Radar (SAR) missions among the world's space agencies could advance toward game‐changing scientific discoveries and fully realizing SAR's practical capability to address many issues facing society.
Cathleen E. Jones, Ake Rosenqvist, Björn Rommen, Magdalena Fitrzyk, Eric Rignot, Bernd Scheuchl, Yujie Zheng, Andrew Hooper, Mark Simons, Tomokazu Kobayashi, Paul Siqueira, Maurizio Santoro, Takeo Tadono, Laura Hess, Heather McNairn, Laura Frulla, Malin Johansson, Wolfgang Dierking, Line Rouyet, Annett Bartsch, Paco Lopez Dekker, Johnny A. Johannessen   +21 more
wiley   +1 more source

Signal Processing for Digital Beamforming FMCW SAR

Mathematical Problems in Engineering, Volume 2014, Issue 1, 2014., 2014
According to the limitations of single channel Frequency Modulation Continuous Wave (FMCW) Synthetic Aperture Radar (SAR), Digital Beamforming (DBF) technology is introduced to improve system performance. Combined with multiple receive apertures, DBF FMCW SAR can obtain high resolution in low pulse repetition frequency, which can increase the ...
Qin Xin, Zhihong Jiang, Pu Cheng, Mi He, Gianluca Ranzi   +4 more
wiley   +1 more source

Treating the innocent victims of trolleys and war

Bioethics, Volume 39, Issue 1, Page 18-25, January 2025.
Abstract Both trolleys and war leave innocent victims to suffer death and injury. Trolley problems accounting for the injured, and not only the dead, tease out intuitions about liability that enhance our understanding of the obligation to provide compensation and medical care to civilian victims of war.
Michael L. Gross
wiley   +1 more source

A Multiple-Input Multiple-Output Synthetic Aperture Radar Echo Separation and Range Ambiguity Suppression Processing Framework for High-Resolution Wide-Swath Imaging

Remote Sensing
Multiple-input multiple-output (MIMO) synthetic aperture radar (SAR) is a promising scheme for high-resolution wide-swath (HRWS) imaging. After echo separation processing, a MIMO-SAR system can provide many equivalent phase centers (EPCs) in azimuth ...
Haonan Zhao, Zhimin Zhang, Zhen Chen, Huaitao Fan, Zongsen Lv, Jianzhong Bi   +5 more
doaj   +1 more source

Channel Phase Mismatch Calibration for Multichannel in Azimuth SAR Imaging Based on Eigen-structure Method

Leida xuebao, 2018
As one of the most important means to achieve a High-Resolution and Wide-Swath (HRWS) imaging of the earth, multichannel in azimuth Synthetic Aperture Radar (SAR) have attracted considerable attention in recent years.
Fan Huaitao, Zhang Zhimin, Li Ning
doaj   +1 more source

Matrix Inversion Method for Azimuth Reconstruction in Bistatic Spaceborne High-Resolution Wide-Swath SAR System

Leida xuebao, 2017
In bistatic spaceborne High-Resolution Wide-Swath SAR systems (HRWS-SAR), the azimuth reconstruction to obtain a uniform sampling signal or Doppler spectrum is a crucial step in image processing because azimuth signals are generally of non-uniform ...
Lin Yuchuan, Zhang Jianyun, Wu Yongjun, Zhou Qingsong   +3 more
doaj   +1 more source

Unambiguous Reconstruction for Multichannel Nonuniform Sampling SAR Signal Based on Image Fusion

IEEE Access, 2020
Multichannel signal processing in azimuth is a vital technique to enable a wide-swath Synthetic Aperture Radar (SAR) with high azimuth resolution. However, the multichannel high-resolution and wide-swath (HRWS) SAR system always suffers from the problem ...
Liming Zhou, Xiaoling Zhang, Yangyang Wang, Liang Li, Liming Pu, Jun Shi, Shunjun Wei   +6 more
doaj   +1 more source

Brief Analysis on the Development and Application of Multi-Input Multi-Output Synthetic Aperture Radar

Leida xuebao, 2014
Recently, a novel conception of Synthetic Aperture Radar (SAR) based on Multi-Input Multi-Output (MIMO) technology draws much attention for its potential advantages.
Zhou Wei, Liu Yong-xiang, Li Xiang, Ling Yong-shun   +3 more
doaj   +1 more source

An Efficient Multichannel SAR Channel Phase Error Calibration Method Based on Fine-Focused HRWS SAR Image Entropy

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
Azimuth multichannel synthetic aperture radar (SAR) is a useful approach to solving minimum antenna area constraint and realizing high resolution and wide swath (HRWS) imaging by multichannel signal reconstruction.
Jixiang Xiang, Xiaojie Ding, Guang-Cai Sun, Zijing Zhang, Mengdao Xing, Wenkang Liu   +5 more
doaj   +1 more source

A Novel Azimuth Doppler Signal Reconstruction Approach for the GEO-LEO Bi-Static Multi-Channel HRWS SAR System

IEEE Access, 2019
For the geosynchronous-low earth orbit (GEO-LEO) bi-static multi-channel high-resolution and wide-swath synthetic aperture radar (HRWS SAR) system, a novel azimuth Doppler signal reconstruction algorithm is developed based on an equivalent baseline ...
Shuang-Xi Zhang, Shaojie Li, Yanyang Liu, Meng-Dao Xing, Junli Chen   +4 more
doaj   +1 more source