Results 11 to 20 of about 207,009 (229)
Accounting for azimuth ambiguities in interferometric performance analysis [PDF]
2012 IEEE International Geoscience and Remote Sensing Symposium, 2012 Azimuth ambiguities affect the interferometric performance of SAR systems, causing a bias in the interferometric phase and a modulation of the interferometric coherence, as also visible in some TanDEM-X interferograms. This paper provides an explanation for this phenomenon and derives the analytical expressions for the phase bias and the coherence ...
Michelangelo Villano, Gerhard Krieger
openaire +6 more sources
Ambiguity Suppression by Azimuth Phase Coding in Multichannel SAR Systems [PDF]
IEEE Transactions on Geoscience and Remote Sensing, 2011 The current generation of spaceborne synthetic aperture radar (SAR) systems suffers from a tradeoff between the achievable spatial resolution and swath width. This has motivated intensive research both on more flexible SAR systems, using multiple transmit/receive channels, and on techniques for removing the ambiguities.
Federica Bordoni +2 more
openaire +10 more sources
Azimuth Ambiguity Suppression in SAR Images Based on Compressive Sensing Recovery Algorithm
Leida xuebao, 2016 Azimuth ambiguities appear widely throughout spaceborne Synthetic Aperture Radar (SAR) images. If the ambiguous energy is relatively strong, a large number of brilliant areas or points will emerge, which may be erroneously judged as actual targets.
Xiao Peng +3 more
doaj +2 more sources
A Method for Discrimination of Ship Target and Azimuth Ambiguity in Multi-polarimetric SAR Imagery
Leida xuebao, 2015 Aiming to remove the false alarm caused by azimuth ambiguity in SAR imagery during the process of ship target detection, a method based on the improved H/α/Wishart unsupervised classification is proposed. First, the scattering echo peak zone of target is
Zhou Wei +3 more
doaj +2 more sources
Azimuth phase coding for range ambiguity suppression in SAR [PDF]
IEEE International IEEE International IEEE International Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004, 2004 A novel ambiguity suppression technique is proposed. Range ambiguities in synthetic aperture radar (SAR) images are eliminated with an azimuth filter after having applied an azimuth phase modulation to the transmitted pulses and a corresponding demodulation to the received pulses. The technique excels by actually eliminating the ambiguities rather than
Jørgen Dall, Anders Kusk
openaire +3 more sources
Remote Sensing, 2023 The LuTan-1(LT-1), known as the L-band differential interferometric synthetic aperture radar (SAR) satellite system, is an essential piece of civil infrastructure in China, providing extensive applications such as surface deformation monitoring and ...
Zongxiang Xu +4 more
doaj +2 more sources
A Novel Multi-Beam SAR Two-Dimensional Ambiguity Suppression Method Based on Azimuth Phase Coding
Remote SensingIn order to address the problems of range ambiguity and azimuth ambiguity in the wide-swath imaging of synthetic aperture radar (SAR), this paper proposes a multi-beam SAR two-dimensional ambiguity suppression method based on azimuth phase coding (APC ...
Yihao Xu +5 more
doaj +2 more sources
Remote SensingSparse Synthetic Aperture Radar (SAR) imaging has garnered significant attention due to its ability to suppress azimuth ambiguity in under-sampled conditions, making it particularly useful for high-resolution wide-swath (HRWS) SAR systems.
Zhiyi Jin +3 more
doaj +2 more sources
Remote Sensing, 2019 In synthetic aperture radar (SAR) images, azimuth ambiguity is one of the important factors that affect image quality. Generally, the azimuth ambiguity-to-signal ratio (AASR) is a measure of the azimuth ambiguity of SAR images.
Hui Meng +4 more
doaj +2 more sources
Fast Approach for SAR Imaging of Ground-Based Moving Targets Based on Range Azimuth Joint Processing
Remote Sensing, 2022 The synthetic aperture radar (SAR) images of a moving target may be out of focus, given the motions of a non-cooperative target. Doppler ambiguities, including the Doppler center blur and spectrum ambiguity, will easily appear due to the limitations of ...
Yuxiang Shu +4 more
doaj +2 more sources