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