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DTSTART:20170312T030000
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DTSTAMP:20170705T180302Z
UID:A08E1BA0-166E-11E8-9184-0050568D7F66
DTSTART;TZID=Canada/Atlantic:20170704T180000
DTEND;TZID=Canada/Atlantic:20170704T193000
DESCRIPTION:Acoustic refraction and scattering by water column features suc
 h as tidal fronts have a profound effect on sonar performance. These featu
 res have been explored with satellite\, imaged with marine radar\, directl
 y measured with CTD and inferred through propagation measurements. However
 \, high-frequency AUV-based sonars offer a unique method of mapping these 
 structures dynamically over a large area. A proof of concept was carried o
 ut in the Columbia River in September of 2014 and 2015. In these field tes
 ts\, an forward-looking sonar was used to map large hydrological events. T
 hese events were simultaneously sensed with marine radar and a large swath
  of the tidal front was imaged with both systems. Because the marine radar
  is only sensitive to surface features\, the use of the sonar provides the
  underwater picture of the event for both fluid dynamics model verificatio
 n and prediction verification for remote sensing techniques. This sensor i
 s now being deployed on a REMUS 600 AUV for seven field trials in the next
  five years in rivers and estuaries to further explore the method.\n\nSpea
 ker(s): Dr Marcia Isakson\, \n\nHalifax\, Nova Scotia\, Canada
LOCATION:Halifax\, Nova Scotia\, Canada
ORGANIZER:christopher@whitt.ca
SEQUENCE:0
SUMMARY:[Legacy Report] Environmental Sensing with AUV-Based Sonar
URL;VALUE=URI:https://events.vtools.ieee.org/m/167903
X-ALT-DESC:Description: <br /><p><span lang="EN-US">Acoustic refraction and
  scattering by water column features such as tidal fronts have a profound 
 effect on sonar performance.&nbsp\; These features have been explored with
  satellite\, imaged with marine radar\, directly measured with CTD and inf
 erred through propagation measurements.&nbsp\;&nbsp\; However\, high-frequ
 ency AUV-based sonars offer a unique method of mapping these structures dy
 namically over a large area.&nbsp\; A proof of concept was carried out in 
 the Columbia River in September of 2014 and 2015.&nbsp\; In these field te
 sts\, an forward-looking sonar was used to map large hydrological events.&
 nbsp\; These events were simultaneously sensed with marine radar and a lar
 ge swath of the tidal front was imaged with both systems.&nbsp\; Because t
 he marine radar is only sensitive to surface features\, the use of the son
 ar provides the underwater picture of the event for both fluid dynamics mo
 del verification and prediction verification for remote sensing techniques
 .&nbsp\; This sensor is now being deployed on a REMUS 600 AUV for seven fi
 eld trials in the next five years in rivers and estuaries to further explo
 re the method.</span></p>
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