OBS of Geoazur/OCA Nice, France - IPGPcrawford/2017_EuroOBS_workshop/Resources/...OBS of Geoazur/OCA...
Transcript of OBS of Geoazur/OCA Nice, France - IPGPcrawford/2017_EuroOBS_workshop/Resources/...OBS of Geoazur/OCA...
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OBSofGeoazur/OCANice,France
BenYates(résponsable)andDavideOregioni
AcCve/RefracConandPassive/EarthquakeSeismology
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OBSofGeoazur/OCANice,France
• 40OBSwithintegrated4.5Hzgimbaledgeophonepackage
• WelladaptedtoacCveseismic/refracConstudies• Compact,light-weight,etc
• Canalsobedeployedforupto6monthsforpassiveseismicstudies–localmicro-seismicity
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OBSofGeoazur/OCANice,France
• Wehave14(atpresent)2Hz,3componentgimbaledgeophonesensors
• Capableof6monthdeploymentswithonesphere
• or1yearwith2spheres
• CanalsobeequippedwithaTrilliumcompact,120ssensor
• Currentlyonly1trilliumcompactintheGeoazurpark
2Hz
TrilliumCompact
These40OBScanalsobeequippedwithothersensors:
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OBSofGeoazur/OCANice,France
• BasedonPersistormicrocontrollerboard• 3componentgeophone(ortrilliumcompact)sensorplusa
hydrophone• PowerconsumpConisapproximately350mWat100Hz
samplingof4channels• 32Gcompactflashcards• SeaScanCmebase(+-4ms/daymax) • ProgrammableacquisiConwindows(sampling,channels,etc)• USBDatatransferthroughclosedsphere• EdgeTechReleaseboard,withburnwire• BenthosandCmerassecondary,backupreleases• StrobeandVHFforrecovery• DataconversiontoMiniseedformataaerrecuperaCon
TechnicalCharacterisCcs:
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OBSofGeoazur/OCANice,France
• GeoazurOBSsince1993-CurrentiniCaldesignfinishedin2004• Parkhasbeenundergoingarefurbishmentsince2014/15
• Replaceunreliablelargebandsensors;poorcouplingforshortperiodsensors
• Acquirefundingtocompleteinstrumentsthatlackedcomponents• Simplifymechanics,integrate4.5Hzsensors• Miniseed/SEEDformatfordata
• NewelectronicsinterfaceforsimplifiedpreparaCon• ON/OFFthroughclosedsphereandcompletepreparaConatlab• Simplifiedbaeerypacks
• Beeermechanicalsystemforrecovery• Back-savingprocedures,apparatus,etc
NeartermFutureandOngoingProjects
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OBSofGeoazur/OCANice,France
• First–More/BeeerSensorpackages:• Atleast6More2Hzsensorstohaveatotalof20• Atleast4or5moreTrilliumcompact120ssensors
• Secondpriority–newacquisiConsystem• Lowerpower• Autogpssync• etc
• OtherinnovaCons• Compass• Buriedsensors• Coveredsensors
FutureProjectsPrioriCes:
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OBS Art