Results 11 to 20 of about 2,700,967 (284)
Sub-aperture SAR imaging with uncertainty quantification [PDF]
Inverse Problems, 2023 Abstract In the problem of spotlight mode airborne synthetic aperture radar (SAR) image formation, it is well-known that data collected over a wide azimuthal angle violate the isotropic scattering property typically assumed. Many techniques have been proposed to account for this issue, including both full-aperture
Victor Churchill, Anne Gelb
openaire +4 more sources
SUB-APERTURE FOCUSING ALGORITHM OF GEOSYNCHRONOUS SAR [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2013 Synthetic Aperture Radar (SAR) on the geosynchronous orbit has the advantage in remote sensing, with high resolution to provide a large coverage in a short visit time.
Y. Zhang, H. Li, H. Xu, B. Hu
doaj +4 more sources
Fast ISAR autofocus algorithm via sub-aperture
The Journal of Engineering, 2019 Translational motion compensation (TMC) is a significant step for inverse synthetic aperture radar (ISAR), while phase autofocus plays an important role in TMC.
Jinjian Cai +3 more
doaj +2 more sources
Remote Sensing, 2013 Autonomous navigation airborne forward-looking synthetic aperture radar (SAR) observes the anterior inferior wide area with a short cross-track dimensional linear array as azimuth aperture.
Xueming Peng +4 more
doaj +2 more sources
A New Autofocus Based on Sub-Aperture Approach
Journal of Electromagnetic Waves and Applications, 2005 High resolution Synthetic Aperture Radar (SAR) requires the motion of radar platform to be known accurately for precise phase error detection. In SAR processing, autofocus technique is commonly used to estimate the phase errors from the radar data.
Koo, V. C., Chan, Y. K., Chuah, H. T.
openaire +3 more sources
Remote SensingAn airborne bistatic radar working in downward-looking mode confronts two major challenges for low-altitude target detection. One is range cell migration (RCM) and Doppler migration (DM) resulting from the relative motion of the radar and target.
Zhi Sun +7 more
doaj +2 more sources
Advances in Mechanical Engineering, 2022 The imaging quality of the synthetic aperture system is sensitive to the positioning accuracy of the sub-aperture primary mirror. A novel flexible mounting structure of bimetallic material is proposed for the athermalization of the sub-aperture primary ...
Yunfeng Li +4 more
doaj +1 more source
Releasing aperture filter constraints [PDF]
, 2007 Aperture filters are a recently introduced class of nonlinear filters used in image processing. In this paper we present a new approach for aperture filter design, improving operator performance with respect to the MSE measure by releasing some of the ...
Marshall, S.
core +4 more sources
EURASIP Journal on Advances in Signal Processing, 2021 Range alignment is an essential procedure in the translation motion compensation of inverse synthetic aperture radar imaging. Global optimization or maximum-correlation-based algorithms have been used to realize range alignment.
Yue Lu, Jian Yang, Yue Zhang, Shiyou Xu
doaj +1 more source
Analysis of Azimuthal Variations Using Multi-Aperture Polarimetric Entropy with Circular SAR Images
Remote Sensing, 2018 In conventional synthetic aperture radar (SAR), sensors with a fixed look angle are assumed, and the scattering properties are considered as invariant in the azimuth.
Feiteng Xue +6 more
doaj +1 more source