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Articles 1 - 3 of 3
Full-Text Articles in Physical Sciences and Mathematics
R/V Kilo Moana Multibeam Echosounder System Review, Jonathan Beaudoin
R/V Kilo Moana Multibeam Echosounder System Review, Jonathan Beaudoin
Center for Coastal and Ocean Mapping
No abstract provided.
Establishing A Multibeam Sonar Evaluation Test Bed Near Sidney, British Columbia, Rob Hare, Clay Whittaker, J.E. Hughes Clarke, Jonathan Beaudoin
Establishing A Multibeam Sonar Evaluation Test Bed Near Sidney, British Columbia, Rob Hare, Clay Whittaker, J.E. Hughes Clarke, Jonathan Beaudoin
Center for Coastal and Ocean Mapping
The Canadian Hydrographic Service (CHS), Naval Oceanographic Office (NAVOCEANO) and the Ocean Mapping Group of the University of New Brunswick (OMG) collaborated on establishing a multibeam sonar test bed in the vicinity of the Institute of Ocean Sciences in Sidney, British Columbia Canada. This paper describes the purpose of the sonar evaluation test bed, the trials and tribulations of two foreign governments collaborating on projects of mutual interest, the evaluation areas and their characteristics for sonar testing, and sample results of sonar evaluations using this test bed. Some target detection comparisons of several systems over a range of artificial sonar …
High-Precision, High-Accuracy Timekeeping In Distributed Survey Systems, Brian R. Calder, Rick Brennan, J Marcus, C Malzone, Peter Canter
High-Precision, High-Accuracy Timekeeping In Distributed Survey Systems, Brian R. Calder, Rick Brennan, J Marcus, C Malzone, Peter Canter
Center for Coastal and Ocean Mapping
Accurate and precise timekeeping between computers in a distributed survey system is essential to ensure adequate data quality, especially with Multibeam Echosounders (MBES) which can otherwise suffer from significant motion artefacts. We show that clock synchronisation on the order of 100-150ns (rms) is readily achievable in a modern MBES-based survey system utilising an Ethernet-based time synchronisation mechanism and some custom timekeeping software. We also show that improving the timekeeping eliminates motion artefacts in the observed bathymetry, and simplifies the patch-test procedure.