Zobrazeno 1 - 10
of 97
pro vyhledávání: '"H.J. Callow"'
Publikováno v:
OCEANS 2018 MTS/IEEE Charleston.
By combining a wide range of systems and technologies, Kongsberg has recently produced a complete, integrated turnkey solution for very high resolution wide-swath real-time acoustic imaging and bathymetry. Named Cassandra, the system is suitable for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::890ba0052ceb546e7c50cf7949da593b
https://doi.org/10.1109/oceans.2018.8604571
https://doi.org/10.1109/oceans.2018.8604571
Publikováno v:
IEEE Journal of Oceanic Engineering. 40:621-631
In October 2012, the Centre for Maritime Research and Experimentation (CMRE, La Spezia, Italy) conducted trials from the NATO research vessel (RV) Alliance, off Elba Island, Italy. During this trial, data were collected by the Norwegian Defence Resea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dee8f363492245418835af2768b1cc94
https://doi.org/10.1109/joe.2014.2340351
https://doi.org/10.1109/joe.2014.2340351
Autor:
H.J. Callow, Robbert van Vossen, Andreas Austeng, Stig Asle Vaksvik Synnes, Alan J. Hunter, Roy Edgar Hansen, Torstein Olsmo Sabo
Publikováno v:
Synnes, S A V, Hunter, A J, Hansen, R E, Sæbø, T O, Callow, H J, van Vossen, R & Austeng, A 2017, ' Wideband synthetic aperture sonar backprojection with maximization of wave number domain support ', IEEE Journal of Oceanic Engineering, vol. 42, no. 4, pp. 880-891 . https://doi.org/10.1109/JOE.2016.2614717
Wideband and widebeam synthetic aperture sonar (SAS) can provide information on the frequency- and aspect-dependent scattering in a scene. We suggest an approach to predict the quality of the sensor data over the available frequencies and aspect angl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::404fd9888fd2e9495f2a2f0b572455ca
https://purehost.bath.ac.uk/ws/files/158363042/Synnes_JOE_2016_PREPRINT.pdf
https://purehost.bath.ac.uk/ws/files/158363042/Synnes_JOE_2016_PREPRINT.pdf
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing. 49:3677-3687
Synthetic aperture sonar (SAS) is emerging as an imaging technology that can provide centimeter resolution over hundreds-of-meter range on the seafloor. Although the principle of SAS has been known for more than 30 years, SAS systems have only recent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e2852a039aa5ad919b0fcc7a1e247133
https://doi.org/10.1109/tgrs.2011.2155071
https://doi.org/10.1109/tgrs.2011.2155071
Publikováno v:
IEEE Journal of Oceanic Engineering. 34:262-268
The effect that uncompensated motion errors have on synthetic aperture sonar (SAS) imagery can be severe. Time-domain beamforming SAS reconstruction is able to compensate arbitrary track errors, but the more efficient frequency-domain reconstruction
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c3754964fdb75c96a673571fc3a64b6
https://doi.org/10.1109/joe.2009.2014659
https://doi.org/10.1109/joe.2009.2014659
Publikováno v:
IEEE Journal of Oceanic Engineering, July, 3, 34, 269-283
—A shadow cast by an object on the seafloor is important information for target recognition in synthetic aperture sonar (SAS) images. Synthetic aperture imaging causes a fundamental limitation to shadow clarity because the illuminator is moved duri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f9b992e5bc85574e70331d6c450650d
https://doi.org/10.1109/joe.2008.920996
https://doi.org/10.1109/joe.2008.920996
Publikováno v:
Proceedings of Meetings on Acoustics.
In synthetic aperture sonar (SAS) imaging, successive pings are combined coherently to synthesize a long aperture. For each ping, the received data is delayed, weighted and summed coherently for each pixel in the image, before images from all pings a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c54c6a038e5e62e0f4b61c80b9b92dd6
https://doi.org/10.1121/1.4828823
https://doi.org/10.1121/1.4828823
Autor:
H.J. Callow
Publikováno v:
OCEANS 2010 MTS/IEEE SEATTLE.
This paper presents a number of different processing strategies for generating synthetic aperture sonar (SAS) imagery when data collection suffers from significant sideways crab (where we define crab as the angle difference between track and heading)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0bec41d071d93415cc6bf652386ac880
https://doi.org/10.1109/oceans.2010.5664446
https://doi.org/10.1109/oceans.2010.5664446
Publikováno v:
OCEANS'10 IEEE SYDNEY.
Accurate and reliable inspection of subsea pipelines traditionally requires the use of multiple sensors, which again have different requirements for range and geometry. This makes pipeline inspection a time consuming and costly process. The use of hi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11c2fcd8d347dd712be933608f97f5f9
https://doi.org/10.1109/oceanssyd.2010.5603518
https://doi.org/10.1109/oceanssyd.2010.5603518
Publikováno v:
OCEANS 2008.
Synthetic aperture sonar (SAS) can produce images with centimetre-level resolution and area coverage of better than one square kilometer per hour. This makes SAS an ideal sensor for detection and classification of small targets over large areas. Full
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b55fefa9ca1170b08ae0162615e7d43
https://doi.org/10.1109/oceans.2008.5152071
https://doi.org/10.1109/oceans.2008.5152071