norbitstx 3d bathy solution
TRANSCRIPT
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NORBIT STX 3Dbathysolution
IR-170033 PAP 2017-06-08
withNORBIT STX
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STX– 4DsonarfromNORBITHowdoesitwork?
NORBITSTX 400kHz withintegratedGNSS/INS
STX Scanningpattern
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Firstobjectsofinterest:Twolargejackupships locatednorthofAmsterdam
SEAJACKSKRAKEN
SEAJACKSZARATAN
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SEAJACKSKRAKEN
GoogleEarthhistoricphotoandoverlaiddatafromsurvey
Steel legs- hardreflectorsanddifficulttargetsforacoustics
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SurveyingwithNORBITSTXallowsseeingbehindtheshadowingstructure
Using20deg scanningallowsraystobesteeredbehindthestructurewhicheliminatessomegaps. Performedwith512ED,Pitchstab,rollstab
Standardbathymetrysurveyshowsgapsduetoshadowsfromthepillars
gaps lessgapsSTX fillsinthegaps!
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STX characterizeobjectsfromdifferentangles
Standardbathymetrysurveyshowsgapsduetoshadowsfrompillarsandlowdefinitionofthestructure
STX eliminatesmanyshadowsandshowsmuchhigherdefinitionduetohitsfrommanyangles
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SEAJACKSZARATAN&
large3mdiameterpillars
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ZARATAN’spillarsaresolidsteelandgivebigshadowsbehind them.Runningnormalsurvey leavesgapsinthedata.
RunningthesamesurveywithNORBITSTXsystemfillsinthegapswiththescannedbeam
STX fillsinthegaps!
gapsNoSTX
lessgapswithSTX
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EvenaslargetargetsasZARATAN’slegscanbelookedbehind!
Standardbathysurveygivesshadowsbehindthestructure STX survey
seesbehind
Widersoundings angle-betterobservability!
gapsNoSTX
lessgapswithSTX
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PilingsinAmsterdamport
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Runningstandardsurveynexttopillarsleaveshadowsandgapsinthegridwhichneedstobere-surveyed
ontheotherside
UsingSTX’s “exploremore”featurethesurveyorcanlookbehindthepillarsfillinginthegapsinasingle
line.
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STX improvesthesurveyefficiency.
ThreelineswithastandardsystemagainstonelinewithSTX!
Gapsbehindpillarswithstandardsurvey
NogapswithSTX
Single line Single line
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Gapsbehindpillarswithstandardsurvey NogapswithSTX
Single line Single line
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Pillarsintheport
Pillarsintheport.Complicatedsteelstructuregivingbigshadowandgapsinthegrid.
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InbothcasessurveyingwithSTX givesbetterbottomcoverageandmorestatisticsonobjects.
Standardbathysurvey STX survey– smallergap
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Conclusions:§ NewNORBITSTX3Dsonar
improvesthecharacterizationofunderwaterstructuresbyusingscanningfeaturesofthetransmittedsignalinsonifyingobjectsfromdifferentangles
§ TheSTXimprovesthesurveyefficiencybyutilizingscanningthatallowsseeingbehindstructureswhichotherwisegiveshadowsandgapsduringthestandardsurvey