Zobrazeno 1 - 10
of 2 968
pro vyhledávání: '"SYNTHETIC aperture sonar"'
Publikováno v:
JASA Express Letters. Mar2024, Vol. 4 Issue 3, p1-7. 7p.
Publikováno v:
JASA Express Letters. Feb2024, Vol. 4 Issue 2, p1-7. 7p.
Publikováno v:
IET Radar, Sonar & Navigation, Vol 18, Iss 11, Pp 2057-2065 (2024)
Abstract The validation of seafloor scattering models used for seabed characterisation requires quantifying the contributions from the sediment interface and volume to the total acoustic returns. At low‐frequencies, direct measurements of sediment
Externí odkaz:
https://doaj.org/article/406dd664fd274f2598582587d5b46b3c
Autor:
Derek R. Olson, Marc Geilhufe
Publikováno v:
IET Radar, Sonar & Navigation, Vol 18, Iss 11, Pp 2044-2056 (2024)
Abstract In quantitative analysis of seafloor scattering measurements, it is common to model the single‐point probability density function of the scattered intensity or amplitude. For more complex seafloors, the pixel amplitude distribution has pre
Externí odkaz:
https://doaj.org/article/4a81c99067c648fda9731d3638ce1274
Autor:
Roy Edgar Hansen, Torstein Olsmo Sæbø
Publikováno v:
IET Radar, Sonar & Navigation, Vol 18, Iss 11, Pp 2034-2043 (2024)
Abstract Interferometric synthetic aperture sonar (SAS) is a technique to image and map the seabed in very high resolution. For large area coverage rate systems with hundreds of metres swath width, the achievable performance varies significantly over
Externí odkaz:
https://doaj.org/article/506e09b483024bb8b89f41904aa69674
Publikováno v:
IET Radar, Sonar & Navigation, Vol 18, Iss 11, Pp 2017-2019 (2024)
Externí odkaz:
https://doaj.org/article/4df4eabebb96477d9fc61fb9daf96d31
Publikováno v:
IET Radar, Sonar & Navigation, Vol 18, Iss 5, Pp 740-753 (2024)
Abstract Accurate and robust time delay estimation is crucial for synthetic aperture sonar (SAS) imaging. A two‐step time delay estimation method based on displaced phase centre antenna (DPCA) micronavigation has been widely applied in motion estim
Externí odkaz:
https://doaj.org/article/f6616c8c1f464fa589c6825d91dbfe04
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 18038-18057 (2024)
Seabed characterization consists in the study of the physical and biological properties of the of ocean floors. Sonar is commonly employed to capture the acoustic backscatter reflected from the seabed. It has been extensively used for automatic targe
Externí odkaz:
https://doaj.org/article/054480a8789a4270b2408d1bc5d74739
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 9517-9532 (2024)
Having well-focused synthetic aperture sonar (SAS) imagery is important for its accurate analysis and support of autonomous systems. Despite advances in motion estimation and image formation methods, there persists a need for robust autofocus algorit
Externí odkaz:
https://doaj.org/article/baae85957c3a473a9b927ecf75135543
Publikováno v:
Remote Sensing, Vol 16, Iss 17, p 3265 (2024)
When a synthetic aperture sonar (SAS) system operates under low-frequency broadband conditions, the azimuth range coupling of the point target reference spectrum (PTRS) is severe, and the high-resolution imaging range is limited. To solve the above i
Externí odkaz:
https://doaj.org/article/e1fadd3114944f7e84f77f7978eb65b1