norbitstx 3d bathy solution

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