Results 81 to 90 of about 83,251 (291)
Autofocus approach for sparse aperture inverse synthetic aperture radar imaging
Electronics Letters, 2015 In the inverse synthetic aperture radar imaging, the autofocus is a required step for generating high‐quality images. However, due to many factors, the aperture data may be sparse so that the classical motion compensation approaches and imaging algorithms are not proper. On the basis of the compressed sensing technique and two optimisation methods (the
Da Xiao, Fulin Su, Jianjun Gao
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Journal of Geophysical Research: Solid Earth, Volume 130, Issue 11, November 2025.Abstract The 6 February 2023 Kahramanmaraş Earthquakes caused extensive deformation along the East Anatolian Fault Zone, producing significant north‐south displacements. Standard Interferometric Synthetic Aperture Radar (InSAR) methods face significant challenges in resolving near‐field deformation due to phase decorrelation caused by high displacement
Muhammet Nergizci +6 more
wiley +1 more source
An Extended Virtual Aperture Imaging Model for Through-the-wall Sensing and Its Environmental Parameters Estimation [PDF]
, 2014 Through-the-wall imaging (TWI) radar has been given increasing attention in recent years. However, prior knowledge about environmental parameters, such as wall thickness and dielectric constant, and the standoff distance between an array and a wall, is ...
Hu, Jun +4 more
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On the use of the l(2)-norm for texture analysis of polarimetric SAR data [PDF]
, 2016 In this paper, the use of the l2-norm, or Span, of the scattering vectors is suggested for texture analysis of polarimetric synthetic aperture radar (SAR) data, with the benefits that we need neither an analysis of the polarimetric channels separately ...
Deng, xinping, López Martínez, Carlos
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Journal of Geophysical Research: Solid Earth, Volume 130, Issue 11, November 2025.Abstract Lava tubes are subsurface conduits within a lava flow that feed its advance. Lava tube detection is important to understand lava flow dynamics and to mitigate geohazards. Here we use InSAR‐derived surface motion data, in combination with shortwave and thermal infrared imagery, to delineate a ∼14 km long lava tube system at Fernandina volcano ...
Alexis Hrysiewicz +6 more
wiley +1 more source
High-Resolution ISAR Imaging With Sparse Aperture VFM Waveforms Under Low SNR Condition
IEEE Access, 2019 In recent years, the compressed sensing theory has been widely used in sparse aperture radar imaging. The inverse synthetic aperture radar (ISAR) imaging based on the sparse aperture echo of V-style frequency modulation (V-FM) waveform, which can ...
Jiyuan Chen +4 more
doaj +1 more source
Computer-Aided Civil and Infrastructure Engineering, Volume 40, Issue 27, Page 4824-4844, 14 November 2025.Abstract Railway track transitions are prone to uneven settlements and track geometry degradation. Traditional monitoring methods are limited in coverage, which highlights the need for novel solutions. This study proposes a method that systematically integrates the high spatial resolution of Persistent Scatterer Interferometric Synthetic Aperture Radar
J. N. Varandas +4 more
wiley +1 more source
Multiview ISAR Imaging for Complex Targets Based on Improved SBR Scattering Model
International Journal of Antennas and Propagation, 2021 A novel multiview inverse synthetic aperture radar (ISAR) imaging method is proposed to simulate high-resolution and identifiable ISAR image of complex targets by handling large-angle and wide-bandwidth scattering data.
Tiantian Feng, Lixin Guo
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Computer-Aided Civil and Infrastructure Engineering, Volume 40, Issue 26, Page 4401-4424, 7 November 2025.Abstract Most post‐disaster damage classifiers perform best when destructive forces leave clear spectral or structural signatures. However, these signatures are often subtle or absent after inundation, where damage may be nonstructural and difficult to detect.
Yu‐Hsuan Ho, Ali Mostafavi
wiley +1 more source
Blur resolved OCT: full-range interferometric synthetic aperture microscopy through dispersion encoding [PDF]
, 2001 We present a computational method for full-range interferometric synthetic aperture microscopy (ISAM) under dispersion encoding. With this, one can effectively double the depth range of optical coherence tomography (OCT), whilst dramatically enhancing ...
A.M. Wing +7 more
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