Results 31 to 40 of about 1,248,801 (164)
High-resolution imaging for the multireceiver SAS
The Journal of Engineering, 2019 The area coverage rate is dramatically improved by using the multireceiver technique. However, this configuration leads to the complexity of the synthetic aperture image formation.
Xuebo Zhang +3 more
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Effect of incorrect sound velocity on synthetic aperture sonar resolution [PDF]
MATEC Web of Conferences, 2019 Synthetic aperture sonar (SAS) is an imaging technique to produce centimeter resolution over hundreds-of-meter range on the sea floor, by constructing a virtual aperture whose length automatically adjusts itself for a given focusing range.
Ji Xia, Zhou Lisheng, Cong Weihua
doaj +1 more source
Advanced Processing for Synthetic Aperture Sonar
, 2021 Synthetic aperture sonar (SAS) is a technique for acoustic imaging and mapping of the seafloor. SAS systems are typically operated from autonomous underwater vehicles in a side-looking configuration.
Synnes, Stig Asle Vaksvik
core +1 more source
Combining range-general and range-specific techniques for late-time focused image reconstructiona) [PDF]
JASA Express LettersSynthetic aperture sonar (SAS) is an acoustic method for detecting objects in an environment. Conventional SAS image reconstruction techniques invert a forward model based on geometric scattering and straight-line propagation.
Kyle S. Dalton +2 more
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A wide-beam NCS algorithm for multi-receiver SAS based on azimuth spectrum superposition
Frontiers in Marine Science, 2023 The existing multi-receiver synthetic aperture sonar (SAS) imaging algorithms are suitable for narrow-beam width, which will lead to a decrease in imaging quality under wide-beam condition and are not in line with the development needs of SAS. We propose
Mingqiang Ning +5 more
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Platform motion estimation in multi-band synthetic aperture sonar with coupled variational autoencoders [PDF]
JASA Express LettersCoherent processing in synthetic aperture sonar (SAS) requires platform motion estimation and compensation with sub-wavelength accuracy for high-resolution imaging.
Angeliki Xenaki +2 more
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Frequency‐domain multireceiver synthetic aperture sonar imagery with Chebyshev polynomials
Electronics Letters, 2022 Based on Chebyshev polynomials, the two‐way slant range is first approximated by the fourth‐order polynomial approximation. With the series reversion method, the point target reference spectrum (PTRS) which is further used for the development of imaging ...
Xuebo Zhang, Peixuan Yang, Haixin Sun
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Multidimensional Waveform Encoding for Synthetic Aperture Radar Remote Sensing [PDF]
, 2007 This paper introduces and analyses the innovative concept of multidimensional waveform encoding for spaceborne synthetic aperture radar (SAR). The combination of this technique with digital beamforming on receive enables a new class of highly ...
Moreira, Alberto +5 more
core +1 more source
Joint Motion Error Estimation Algorithm for Multibeam Synthetic Aperture Sonar
IEEE Access, 2018 Multibeam echo sounder (MBES) and synthetic aperture sonar (SAS) are effective image sonar systems used as the major underwater observation instruments. The MBES system can get the fullscan detection without gaps, while the resolution on the along-track ...
Bo Wei, Haisen Li, Tian Zhou, Chao Xu
doaj +1 more source
Sedimentology, Volume 73, Issue 3, Page 593-619, April 2026.ABSTRACT Mesophotic reefs are located in low light conditions which, depending on the region, are usually found in water depths greater than ~30 m. They are less affected by ocean warming than reefs found in shallower water depths and thus might become increasingly important for the sustainability of marine biodiversity.
Or M. Bialik +7 more
wiley +1 more source