Results 71 to 80 of about 641,941 (183)
IEEE Journal of Selected Topics in Applied Earth Observations and Remote SensingSince the minimum antenna area constraint in the spaceborne single-channel synthetic aperture radar (SAR), it's difficult to achieve high-resolution and wide-swath imaging simultaneously.
Zirui Ma +3 more
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Improved MISO-SAR System Based on BiDirectional Imaging
Leida xuebao, 2015 In 2012, the German Aerospace Center (DLR.) proposed a BiDirectional mode that can achieve several seconds of repeated time lags by single star and single flight.
Jiang Hai, Song Hong-jun
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A Signal Processing Method for Azimuth Multichannel SAR With Partial Channels Missing
IEEE Journal of Selected Topics in Applied Earth Observations and Remote SensingThe azimuth multichannel synthetic aperture radar (SAR) system enhances spatial sampling by increasing channels, resolving the conflict between high resolution and wide mapping swath.
Zonglin Yang +7 more
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High Resolution Wide Swath SAR Imaging - System Performance and Influence of Perturbations [PDF]
, 2005 The displaced phase centre (DPC) technique enables a wide swath SAR with high azimuth resolution. In classic DPC systems, pulse repetition frequency (PRF), sensor velocity and antenna length underlie a stringent timing requirement to ensure uniform ...
Moreira, Alberto +2 more
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IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2018 To address the problems of location and suppression of inshore azimuth ambiguous clutter for the azimuth multichannel synthetic aperture radar (SAR) systems, a multifeature autosegmentation-based approach is developed in this paper. This proposed method can segment a SAR image automatically according to the distinctions among main land clutter ...
Huajian Xu +5 more
openaire +1 more source
Ultra Wide Swath Imaging With Multi-Channel SAR Systems [PDF]
, 2008 Multi-channel radar systems allow for overcoming the inherent limitation of conventional synthetic aperture radar (SAR). An example is the combination of digital beamforming on receive in elevation with multi-aperture SAR signal reconstruction in azimuth
Bordoni, Federica +4 more
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Effective ambiguity checking in biosequence analysis [PDF]
, 2005 Reeder J, Steffen P, Giegerich R. Effective ambiguity checking in biosequence analysis. BMC Bioinformatics. 2005;6(1): 153.Background: Ambiguity is a problem in biosequence analysis that arises in various analysis tasks solved via dynamic programming ...
Peter Steffen +5 more
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Spectral-Based Estimation of the Local Azimuth Ambiguity-to-Signal Ratio in SAR Images
, 2013 An innovative technique to estimate the local azimuth ambiguity-to-signal-ratio (AASR) in synthetic aperture radar (SAR) images is presented. Unlike the backscatter-based technique, the proposed one, based on the spectral properties of the image, does ...
Villano, Michelangelo, Krieger, Gerhard
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A spectroscopic method for the solution of the 180-deg azimuth ambiguity in magnetograms
, 1993 International audienceA spectroscopic method is proposed for removing the azimuth ambiguity intrinsically present in vector magnetograms. The method is based on the idea that the polarization observed in resonance lines (typically formed at the ...
Bommier, Véronique +1 more
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SAR antenna design for ambiguity and multipath suppression [PDF]
, 1993 A high resolution airborne synthetic aperture radar (SAR) has been developed at the Electromagnetics Institute (EMI) for remote sensing applications. The paper considers the radiation of antennas for a SAR system from a systems perspective.
Christensen, Erik Lintz +3 more
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