OFG Self-Compensating Magnetometer (SCM) added to Teledyne Gavia sensor suite

Teledyne Gavia, manufacturer of the Gavia autonomous underwater vehicle (AUV), has completed trials of the AUV Self-Compensating Magnetometer from Ocean Floor Geophysics (OFG).

Figure 1: Map of raw Total Magnetic Intensity (TMI) acquired with SCM installed on the hull of Teledyne Gavia vehicle

Following successful integration and field trials in Iceland of the OFG Self-Compensating Magnetometer (SCM) on the Teledyne Gavia AUV the sensor system is now being offered as part of the ever expanding suite of tools available to Gavia users.

Figure 2: Map of residual compensated Total Magnetic Intensity (TMI) of the same area as previous figure with OFG SCM compensation algorithm applied.

CEO of OFG, Matthew Kowalczyk elaborated on the principal advantage of the SCM system: “There are many magnetometer technologies available on the market. The requirement that drove the development of the SCM system was to remove the need to tow a magnetometer, which is problematic in many AUV operations. The SCM can be integrated inside the body of the AUV or simply strapped to the hull of the AUV and compensates for the magnetic signature and motor currents of the AUV. This results in a system that does not have to be mounted on a pole, does not have to be towed behind the AUV or put into a de-gaussed hull section. Not only does this simplify integration into new vehicles, but opens up opportunities for simple retrofits for existing AUVs regardless of the sensor/battery/hull configurations that they have.  You can even change the vehicle configuration and magnetic signature between missions, e.g. adding or removing sensors, and the SCM will still work as the compensation coefficients are calculated at the beginning of each mission.” 

Equipping the Gavia with the OFG SCM system for AUVs enables the collection of real-time compensated data that removes the magnetic signature of the AUV ensuring that the ambient field is being measured rather than the AUV itself. Combining the compensated three-vector magnetic data of the SCM with other sensors such as side scan imagery, bathymetric survey data, sub-bottom profiler data, and water chemistry sensors further increases the value of AUV data. The OFG SCM systems for AUVs are being used around world on various applications ranging from geological mapping, mine-countermeasures, and vessel signatures, to unexploded ordnance (UXO), and marine archaeology.

Teledyne Marine strives to provide our customers with a variety of technical solutions to meet their operational requirements. The integration and testing of the OFG Magnetometer has yielded good results and will be a valuable option for current and future Teledyne Gavia and SeaRaptor AUV users.” Arnar Steingrimsson, Director Strategic Business Development AUVs, Teledyne Marine

Contact: Matthew Kowalczyk, Eng., CEO

Info@OceanFloorGeophysics.com

+1-778-862-9480

Contact: Kolbrun Arnadottir, Inside Sales Manager

Gavia_sales@teledyne.com

+354-511-2990

Another Major Gas Hydrate CSEM Mapping Campaign Completed in Japan

CSEM-Transmitter

Ocean Floor Geophysics Inc. (OFG), in cooperation with Fukada Salvage and Marine Works Co. Ltd. (Fukada), has completed a third high resolution Controlled Source Electromagnetic (CSEM) survey of near surface gas hydrates using the Scripps Institution of Oceanography (Scripps) Vulcan system for the National Institute of Advanced Industrial Science and Technology (AIST) in Japanese waters.

Following the successful CSEM surveys and 3D inversion models completed in 2014 and 2015, the 2017 survey comprised over 413 line kilometers of high resolution data collected in depths up to 1640 m from the Fukada vessel Shin Nichi Maru. A 3D inversion of the EM data for the entire 2017 survey area has also been completed and delivered to the client.

The Vulcan system is a highly flexible CSEM system capable of a depth of investigation of up to 1 km.  This depth of investigation can be increased to a depth of several kilometers with the addition of seafloor receivers.  The data processing and inversion workflow uses mature and well tested computer codes developed at Scripps, and at the University of British Columbia.

OFG is a world leader in the commercial deployment of deep-water marine electromagnetic systems.  OFG in cooperation with Fukada can also now deploy an Autonomous Underwater Vehicle (AUV) based CSEM system that is a complement to the towed Vulcan system for the mapping of gas hydrate deposits and Submarine Massive Sulfide (SMS) deposits. Together, the towed source Vulcan system and the seafloor transmitter based AUV CSEM system provide a tested sea-ready capability to map seafloor resistivities in multiple exploration scenarios.

Press Release: OFG supports successful project combining AUV and USV mothership to survey the ocean’s depths

  OFG AUV   Chercheur   launching from AUV bay of mothership USV   Maxlimer   (Photo: Lew Abramson)

OFG AUV Chercheur launching from AUV bay of mothership USV Maxlimer (Photo: Lew Abramson)

Ocean Floor Geophysics Inc. (OFG) works with the Shell Ocean Discovery XPRIZE GEBCO-NF Alumni Team to advance the state of the art in autonomous seafloor survey through operations support, expertise, and OFG’s HUGIN Autonomous Underwater Vehicle (AUV) Chercheur.

Burnaby, BC, Canada – January 25, 2018

The GEBCO-NF Alumni Team has completed the Technology Readiness Tests of the Shell Ocean Discovery XPRIZE using a combined Unmanned Surface Vessel (USV) and Autonomous Underwater Vehicle (AUV) system.  The goal of the XPRIZE challenge is to advance ocean technologies for rapid, unmanned and high-resolution ocean exploration and discovery.

This is a world first using the Hugin AUV and a USV mothership for launch, synchronized autonomous AUV survey operations, and recovery of the AUV back in to the USV. The project demonstrated that combined AUV and USV systems are a viable option for future offshore survey and inspection projects. 

The Team chose to work together with OFG to integrate the HUGIN AUV Chercheur, in to the system. Chercheur is an industry-leading survey and pipeline inspection AUV equipped with a multibeam, camera, sub-bottom profiler, OFG Self Compensating Magnetometer (SCM), water chemistry sensors, and the HISAS 1032, a deep-water interferometric synthetic aperture sonar, that was used to collect bathymetric and imagery data for this project.

The USV SEA-KIT Maxlimer was designed by Hushcraft Ltd to act as a surface support vessel for the AUV, including the capacity to launch and recover the AUV and to provide subsea communications and positioning. SEA-KIT is a rugged, impact-safe and self-righting USV that can carry a deployable and retrievable payload of up to 2.5 tons. It has passive motion damping, a stable single-compartment flooding system and a self-deploying and stowing sea anchor to ease and ensure safe operations. The autonomous capabilities of the USV were provided by the K-Mate controller developed by Kongsberg Maritime and the Norwegian Defence Research Establishment (FFI).

In addition to the development of the AUV and USV systems used for data acquisition, the Team developed a complete data processing workflow using Teledyne CARIS and ESRI software allowing all the data products to be delivered within 24 hours. The workflow developed was highly automated from data download to delivery of a complete ArcGIS database of the entire survey area, including HiSAS imagery at 4 cm resolution, multibeam bathymetry, interferometric bathymetry and areas of interest reprocessed HiSAS imagery at 2 cm resolution. 

Autonomous AUV seafloor survey, with an AUV launch and recovery (human-in-the-loop), with the USV autonomously tracking the AUV for a complete survey mission while being monitored from a remote shore station, were demonstrated to be a viable option for future offshore survey and inspection projects.  The technology, processes and procedures developed for this project are a big step towards larger scale implementation of these concepts.

HISAS_imagery_fishing_vessel_acquired_with_AUV_Chercheur-LR.jpg

[Full version of the video can be viewed at OFG supports successful project combining AUV and USV mothership - Full Version

______________________________________________________________

To learn more about OFG’s AUV capabilities, or to discuss other marine electromagnetic (EM), magnetic and seafloor mineral exploration services, contact Matthew Kowalczyk at +1-778-654-7781 or by email at info@oceanfloorgeophysics.com or visit the website at www.oceanfloorgeophysics.com

Ocean Floor Geophysics Inc. (OFG) is a marine geophysics company that provides data acquisition and analysis services that were previously unavailable by combining specialised expertise in subsea operations, sensor design and sensor integration with geophysical technologies beyond the scope of traditional marine geophysical surveys. These include the OFG AUV integrated Cathodic Protection (iCP) system, marine magnetics, EM, and CSEM/MT, deployed by ROV, AUV and deep tow systems. OFG is an advanced user of powerful 2D and 3D EM and magnetic forward modelling and inversion software. This range of technologies and experience allows OFG to support clients from survey design through to data integration and analysis. OFG will provide you with a new perspective on survey and inspection and deliver the data you need to make informed decisions for your projects. 

Unlocking the power of AUVs and USVs to map the world's oceans: Shell Ocean Discovery XPRIZE

 Photo: Alex DeCiccio

Photo: Alex DeCiccio

The Ocean Floor Geophysics (OFG) AUV team is proud to be part of a world first with the GEBCO-NF Alumni Shell Ocean Discovery XPRIZE team: autonomous seafloor survey with our world class Hugin survey and pipeline inspection AUV "Chercheur". AUV Chercheur was launched from the Unmanned Surface Vessel (USV) Sea-Kit, performed a high resolution seafloor survey with USBL positioning and communications to the USV, and was recovered by the USV.  This accomplishment by the GEBCO-NF Alumni team represents a huge stride forward autonomous mapping of the ocean's depths, supported by experts, resources, and equipment from the Nippon Foundation, GEBCO-NF Alumni, Ocean Floor Geophysics, Hushcraft, Kongsberg Maritime, and Teledyne Caris.

Resource Links:

Seafloor Mapping Technologies for Deep Sea Mining - Asia Pacific Deep Sea Mining, Singapore, Nov. 21-22

OFG has been actively involved in seafloor minerals exploration since the formation of the company to support SMS exploration with our patented electromagnetic OFG EM Mk III system. Continuous involvement in seafloor minerals projects all around the world, with a particular focus on SMS deposits, has resulted in the application and development of a wide range of mapping technologies by OFG and our partners. The Asia Pacific Deep Sea Mining Summit in Singapore on November 21 and 22 offers a perfect venue to share some of these advances in mapping techniques ranging from 3D vertical cable seismic to magnetics to a new AUV electromagnetic system. The CEO of OFG, Matthew Kowalczyk, Eng., will be presenting on day 2 of the conference during the Seafloor Mapping Technologies for Deep Sea Mining session.  

OFG at the MTS Puget Sound Section Technology Summit

November 6th, 2017 - Marine Technology Summit, University of Washington South Campus Center

OFG will be presenting the latest AUV electromagnetic system for the efficient mapping of seafloor minerals exploration. The economic and operational advantages of the AUV-borne controlled source electromagnetic (CSEM) system that has been developed and deployed over the last two years will be discussed. Results of the initial tests and development work along with the 3D earth model created from AUV data acquired during the AUV CSEM mapping campaign will also be presented.

http://www.mts-pugetsound.org/nw-tech-summit-2/

OFG to present advances in AUV electromagnetic sensors for seafloor mineral exploration at UMC in Berlin

OFG CEO Matthew Kowalczyk, will be presenting: Controlled source electromagnetic mapping of massive sulfide deposits with an AUV

OFG in collaboration with Fukada Salvage and Marine Co. Ltd. and the Scripps EM Laboratory has developed and demonstrated an AUV Controlled Source Electromagnetic (AUV-CSEM) system for the mapping of seafloor massive sulfides.  The system can equally be deployed in the mapping of resistive subsurface bodies such as gas hydrates.  The economic and operational advantages that the AUV CSEM system presents through the concurrent acquisition of magnetic, CSEM, water chemistry, SBP, SSS and MBES data from a single AUV in a single pass are clear.  Results of the initial tests and development work along with the 3D earth model created from AUV data acquired during the  AUV CSEM mapping campaign following the test program will be presented 

Looking forward to seeing you there. UMC Sept 24 – 29, Berlin, Germany.

http://www.underwatermining.org/UMC_presentations.htm

Dr. Karen Weitemeyer joins the OFG geophysics team - further strengthens electromagnetic expertise in the group

Karen_Headshot_1.jpg

Dr. Karen Weitemeyer is an internationally recognized expert in marine electromagnetic (EM) methods applied to mapping marine gas hydrate deposits.  She has over 10 years world-wide experience in the collection, processing, and modelling of marine EM data.  She most recently obtained her Professional Geoscientist designation while working for Advisian, WorleyParsons in Calgary, Alberta on a variety of land-based near surface geophysics projects such as contaminate transport and bedrock mapping, reviewing UXO remediation documents, and cross well ERT modelling.  Prior to this Karen held a Lectureship in Marine Electromagnetics at the University of Southampton and is currently a visiting researcher.  Karen has written and co-authored several scientific papers on marine EM methods applied to mapping gas hydrates. Karen received her PhD in 2008 from the University of California, San Diego while studying at the Marine EM Lab at Scripps Institution of Oceanography.  Karen obtained her BSc (Hon) Geophysics in 2003 from the University of British Columbia and is pleased to be returning to British Columbia.

University of Tasmania AUV Delivered with OFG Magnetometer

The OFG Self-Compensating Magnetometer (SCm) system delivered with the new ISE Explorer AUV "nupiri muka" will help researchers understand more about the geology of Antartica and the Southern Ocean. (http://subseaworldnews.com/2017/08/22/photo-eye-of-the-sea-auv-launched-in-australia/?uid=3650)

The SCM system compensates for the the internal magnetic field of the AUV so that the ambient magnetic field is recorded which is typically overwhelmed by the internal magnetic field of the AUV. (http://www.oceanfloorgeophysics.com/ofg-scm/)

 

 

Dr. Brian Claus adds to OFG AUV expertise

OFG is happy to welcome Dr. Brian Claus to the OFG team.  His expertise in AUV systems complements OFG's significant AUV capabilities. 

Dr. Brian Claus has most recently been a post-doctoral scholar at Woods Hole Oceanographic Institute (WHOI) where he investigated cooperative acoustic navigation methods using IVER autonomous underwater vehicles with low grade odometry. Also at WHOI, Dr. Claus validated a magnetic sensing methodology for use on an autonomous underwater glider and investigated methods for extending the operational region of long duration underwater platforms to below 1000 meters. His Doctoral work at Memorial University in Newfoundland, Canada, was on energy efficient navigational methods for long range underwater vehicles in surface denied regions for which he received his Ph.D in 2015.  He has worked extensively with underwater gliders, including the design of an auxiliary glider propulsion system which is often called a Hybrid Glider which was the subject of his Masters Thesis. Dr. Claus completed his Masters degree in Engineering from Memorial University in 2010 and an Electrical Engineering degree from the University of Victoria in 2008.

OFG presenting at the Underwater Intervention 2017 conference

Donizeti Carneiro, PhD., Business Development Manager will be presenting a paper "Geophysical Methods from Exploration for Pipeline Inspection" at the Underwater Intervention 2017 conference in New Orleans (February 21 - 23, Morial Convention Center Hall B1, New Orleans, LA, USA). Learn how OFG electromagnetic technologies developed and deployed by AUV can be applied for the non-contact inspection of subsea pipelines. Applications in cathodic protection (CP) inspection as well as the detection of invisible flaws such as cracking, fractures, erosion and corrosion through the use of technologies proven in the arena of subsea minerals exploration will be discussed. 

Oceanology International North America 2017: OFG to present Self-Compensating Magnetometer (SCM) results from Remus 600 AUV

The Self-Compensating Magnetometer (SCM) System – Test Results from a Remus 600 AUV Survey in Yellowstone Lake

Panel Session: Unmanned Vehicles and Vessels - Innovations in Autonomy

Location: Conference Room 26B

Date and Time: Wednesday Feb 15th from 16:00 - 17:30

In 2016, Ocean Floor Geophysics (OFG) released a new Self-Compensating Magnetometer (SCM) system to the subsea industry.  This magnetometer was designed specifically for use in autonomous underwater vehicles (AUVs) and some remotely-operated underwater vehicles (ROVs).  Using data collected during a calibration maneuver, correction coefficients are calculated for the magnetization of the AUV itself, its attitude in the Earth’s magnetic field, and for variable electro-magnetic effects related to the power drawn by the vehicle’s propulsion and maneuvering system.  This compensation algorithm eliminates the need to tow the magnetometer or degauss the vehicle to collect useful magnetic data.

Collecting data with a magnetometer mounted inside or on an underwater vehicle enables the production of much higher resolution magnetic maps than those produced using a surface vessel.  Using the SCM, magnetic data can be collected concurrently with high resolution multibeam, side scan, and/or sub-bottom data enabling the interpretation of geology on a local scale instead of a regional one.

As part of product testing, OFG has deployed the SCM on vehicles by various AUV manufacturers. We discuss here the data from a magnetometer deployed on Remus 600 AUV doing a multibeam mapping project in Yellowstone Lake.  Magnetic data was collected over four dives and compensation was applied to the raw data using the SCM algorithm. Maps were generated and compared with historical magnetic data collected using airborne techniques.  The comparison shows that the data collected using the OFG SCM is consistent with the airborne results but provides significantly more detail, revealing features that were not visible in the airborne data.  These local features can provide useful and detailed geological data that compliments the precision bathymetry collected by the AUV.