FREE-FALL OBS APPLICATIONS
- Local and regional seismic research
- Energy exploration
- Carbon storage
- Noise surveys
- Aftershock monitoring
- Earthquake/Tsunami Early Warning
- Instrument pools
CABLED OBS APPLICATIONS
- Real-time data streaming
- Cable to shore or cable to buoy systems
- Local, regional and teleseismic monitoring
- Earthquake/Tsunami Early Warning
- Volcanic monitoring
We have more than thirty years experience of developing OBS systems and during this time we have developed systems for virtually every deployment scenario.
Tried and tested on successful deployments all around the globe, ours is the most comprehensive range of cabled and portable ocean bottom instruments available.
As well as housing truly broadband, triaxial sensors to capture the full seismic frequency range, a must for all seismic monitoring applications, we can also integrate additional sensors and gauges, vastly extending the application and capability of our OBS systems.
Portable, freefall ocean bottom system, operational at any angle and suitable for depths of up to 6000 m/19,685 ft.
- The advanced triaxial, broadband seismometer is fully operational at ±90 °, making it ideal for free-fall deployment onto the sea floor at depths of up to 6000 m
- A three-axis magnetometer and a MEMS accelerometer record the seismometer’s 3D position on the seabed for data rotation during post-processing
- The seismometer has a flat response between 120 s and 100 Hz, with a user-selectable long-period corner from 120 s to 1 s, so you can tailor the response to the environment
- Battery is sized to record seismic data for up to 18 months, with options to extend this if required
- Using acoustic telemetry, transfer state-of-health parameters and noise performance plots from the seabed; select the desired response of the sensor and; measure the time offset of the digitiser housed in the OBS pressure vessel
- Options to utilise acoustic telemetry to transmit triggered event data to a receiver located at the surface on a buoy or rig in near-real-time for alert applications
- Data transmission between the surface and the Aquarius on the seafloor at up to 9000 bps using the direct acoustic communication
- Aquarius is fitted with an absolute pressure gauge (APG) and a hydrophone. with options to upgrade these if desired e.g. for tsunami detection
- Data are stored locally in a dual redundant 128 GB Micro-SD card and can be downloaded using a Gigabit Ethernet after recovery
- A single cable connecting the Aquarius to the Güralp deck unit powers the system for data retrieval and system configuration. This allows for separate and concurrent charging of the batteries via a dedicated connector to an external charger, so that the system can be re-deployed as rapidly as possible
- The system is equipped with rechargeable lithium-ion batteries for fast and easy re-deployments, equating to approximately one hour to re-charge, for each month deployment
A real-time cabled OBS that sits fully or partially buried on the seafloor for depths of up to to 6000 m/19,685 ft.
- Suitable for depths of up to 6000 m (19,685 ft)
- Cable-to-shore or cable-to-buoy system
- Dual sensors: 3T broadband seismometer and Fortis accelerometer provide simultaneous monitoring of both weak signals and high intensity shaking in a single system
- Optional add-on sensors include absolute pressure sensor, hydrophone, current meter and thermometer
- Aluminium or titanium housing for corrosion resistance and waterproofing
- Optional concrete dome to reduce noise and protect against fishing trawlers
- Data digitised at site with real-time streaming to onshore data centre
- Digitizer timing synchronised with NTP or PTP protocols.
- External sensors with Ethernet can use the same timing protocols
- Flexibility to connect with a wide range of cable systems e.g. Ethernet or optic fibre
- Constant power supply plus back-up battery
- Deployment via winch with ROV support required for deeper installations
- Robust self-levelling system
A real-time cabled OBS, pushed or cored into the seafloor, suitable for depths up to to 3000 m / 9,854 ft*
- Suitable for depths of up to 3000 m (9,854 ft)
- Subsurface burial for improved data quality and trawl resistance
- Easily strung together for daisy chain arrays
- Titanium grade 5 casing
- The Minimus interface unit digitises data at site with real-time streaming over Ethernet to the onshore data centre
- Optional low-latency mode running causal filters
- Power and Ethernet stream via wet-mateable connector
- Synchronised absolute time with onshore GPS
- Flexibility to connect with a wide range of cable systems e.g. optic fibre
- Deployment and cable installation via ROV
View our OBS brochure:
