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An Azimuth Ambiguity Suppression Method Based on Ambiguity Focusing for SAR-GMTI
IEEE Geoscience and Remote Sensing Letters, 2023Mingjie Zheng, Yuwei Ren, Zhongzheng Yin
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IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022 In this article, an azimuth ambiguity suppression method based on ambiguity area imaging and detection is proposed, which is suitable for various imaging modes such as strip, spot, and multichannel modes. The basic idea of this method is to focus the image of each azimuth ambiguity area of a single-look complex synthetic aperture radar (SAR) image ...
Xiaolan Qiu, Xuejiao Wen
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Azimuth Ambiguities Removal for Ship Detection Using Full Polarimetric X-Band SAR Data
IEEE Transactions on Geoscience and Remote Sensing, 2014 Synthetic aperture radar (SAR) ship detection is an important application in the field of maritime security. Azimuth ambiguities caused by the aliasing of the Doppler phase history of each point are often visible in SAR images particularly in ocean areas
Domenico Velotto, Susanne Lehner
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An Advanced Azimuth Ambiguity Suppression Scheme for Azimuth Multichannel SAR System
IEEE Geoscience and Remote Sensing LettersRobert Wang, Pingping Lu, Yonghua Cai
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Azimuth ambiguity of multi-channel SAR
2012 IEEE International Geoscience and Remote Sensing Symposium, 2012Azimuth multi-channel synthetic aperture radar has been widely studied to realize high resolution wide swath imaging. Spectrum reconstruction algorithm deals with the main-lobe aliasing while the side-lobe spectrum still exists and is weighted by the reconstruction network as well.
Xile Ma +3 more
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Reconsideration of Azimuth Ambiguities in SAR
IEEE Transactions on Geoscience and Remote Sensing, 1987The traditional method of specifying and controlling azimuth ambiguities in SAR is through integrated energy balance measures. However, the most frequently observed azimuth ambiguities arise from ensembles of strong point reflectors in the principal sidelobes of the antenna, which in turn are aliased into the processed Doppler bandwidth by the radar ...
R. Keith Raney, G. Julius Princz
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A Novel Range-Azimuth Joint Modulation Scheme for Range Ambiguity Suppression
IEEE Transactions on Geoscience and Remote Sensing, 2022Range ambiguity is a technical challenge for current spaceborne synthetic aperture radar (SAR) systems. To this end, a novel range-azimuth joint modulation transmission scheme is proposed, and the corresponding imaging processing and performance analysis are detailed.
Robert Wang, He Yan
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Journal of Petroleum Science and Engineering, 2021
Abstract Due to the symmetrical directivity of a dipole transducer, dipole reflected S-wave imaging logging results in ambiguous azimuth measurements of reflectors. Based on an orthogonal dipole source and an eight-element azimuthal receiving station, we proposed an improved method for measuring the azimuth of a reflector and applied it to a borehole
Dan Li +6 more
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Abstract Due to the symmetrical directivity of a dipole transducer, dipole reflected S-wave imaging logging results in ambiguous azimuth measurements of reflectors. Based on an orthogonal dipole source and an eight-element azimuthal receiving station, we proposed an improved method for measuring the azimuth of a reflector and applied it to a borehole
Dan Li +6 more
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Field azimuth disambiguation using ambiguity-free currents
Solar Physics, 1996Using the ambiguity-free vertical current defined by Semel and Skumanich (1995) we derive a minimum-current azimuth disambiguation for the observed magnetic field in the active region NOAA 7201. A comparison of such a minimum-current azimuth resolution with those from other extant methods indicates that the resulting resolution, even though found to be
A. Skumanich, M. Semel
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Azimuth depolarization ambiguities in Synthetic Aperture Radar
International Journal of Remote Sensing, 1988Abstract The effects of target depolarization in measurements made by stationary microwave systems have been extensively investigated. The use of depolarized measurements can provide information not available in the like-polarized measurement alone.
D. H. LUKERT, A. J. BLANCHARD
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