Broadband News

(Image: CGG / TGS)

CGG and TGS Partner for Greater Castberg Survey

;s advanced imaging technology,” said Sophie Zurquiyah, CEO, CGG. “This unique solution enables our clients to delineate shallow-to-intermediate depth targets in the Barents Sea, which are not resolved by conventional methods.“The new survey will add to CGG’s library of modern broadband multi-client data in the Barents Sea, an excellent resource for optimizing the discovery and development of hydrocarbons.&rdquo

This slice, at a depth of 595 m through the Q model, clearly highlights the extent of the Peon gas field (image courtesy of CGG Multi-Client & New Ventures)

High-End Seismic Imaging Solves Shallow Gas Challenges

greater clarity to Northern Viking GrabenCGG has recently completed seismic depth imaging of its entire Northern Viking Graben multi-client survey, in the Norwegian North Sea. The latest visco-acoustic (“Q”) velocity modeling and seismic imaging technologies have been applied to BroadSeis broadband variable-depth streamer field data, acquired between 2014 and 2016. The final output forms a contiguous data volume covering 35,400 km².The Northern Viking Graben, like many other areas around the globe, contains a wide range of localized near-surface geological anomalies – with shallow

(Image courtesy of SBGS)

Seismic From Below

the seismic sources and the seabed receivers, 4-component (4-C) sensors – results in better seismic data quality than can be acquired with towed streamers,” said Midenet. “Ocean bottom data acquired with geophones and hydrophones, first described in the 1950s, was the original marine broadband acquisition technique and was used extensively in the 1980s, predating towed streamer broadband methods by more than 20 years. The combination of vector (geophone) and scalar (hydrophone) sensors allows the down-going reflection from the sea surface, known as the sea surface ghost, to be removed

(Image: Nautel)

Canada's Halifax-Class Frigates Get a Sonar Upgrade

;Canada.The upgraded sensors will offer the RCN an improved ability to detect and track underwater threats utilizing advanced Sonar amplifiers and transducers designed and manufactured by Nautel.As part of the hull-mounted sonar upgrade program, Nautel will supply NS72-36 sonar amplifiers and Mk II broadband transducers. According to Nautel, its NS Series Sonar amplifiers, developed in Canada, are the most modern designs available today. When combined with Nautel’s latest Mk II broadband transducers, NS Series amplifiers can be deployed to create the most advanced transmit chain for underwater

(Image: Kongsberg)

Mapping the Future

Kongsberg Maritime in conjunction with FFI, the Norwegian Defence Research Establishment and builds on a history of collaborative development projects, including the HUGIN AUV System.In addition to the the autonomy controller solution, SEA-KIT will be equipped with Kongsberg Maritime’s Maritime Broadband Radio (MBR) for high bandwidth direct communication to shore, SeaPath 135 with an MRU5+ for heading, attitude and positioning and the AIS300 Automatic Positioning System. KONGSBERG’s HiPAP acoustic positioning and control system will be used to supervise AUV operations

Knifefish mine countermeasure UUV (Photo: General Dynamics Mission Systems)

Knifefish UUV Completes Sea Acceptance Tests

that can be quickly and efficiently modified to accommodate a wide range of missions.Knifefish operates as an off-board sensor capable of autonomously detecting, classifying and identifying buried, bottom and volume mines in high-clutter environments in a single pass. The UUV's low frequency broadband synthetic aperture sonar enables long range, high confidence mine identification

(Photo: RS AQUA)

High-tech Sensors Advance Tsunami Monitoring

five new RBRquartz³ BPRs (bottom pressure recorders) from oceanographic instrumentation manufacturer RBR for a long-term research program with the Insitu Marine Laboratory for Geosystems Research (iMARL). The iMARL is a network of deep sea ocean sensors including ocean bottom seismographs (OBS), broadband acoustic sensors, and RBRquartz³ BPRs for measuring absolute water pressure and temperature at the ocean floor. Strapped to deep sea landers, the iMARL network will allow for the detection of offshore earthquakes and offshore storms, as well as noise in the ocean and biologically generated

(Photo: Teledyne RD Instruments)

Teledyne RDI Improves DVL Bottom-tracking Range

and our 150 kHz DVLs can bottom track to over 500m, but these products are too large to use on the emerging smaller class vehicles.“TRDI’s 30 years of Doppler signal processing experience has allowed us to develop a new algorithm that combines the strengths of narrowband with our proven broadband signal processing, giving us the unique combination of the improved range of a narrowband signal, with the proven reliable bottom detection of a broadband signal.”Teledyne RDI’s DVLs provide precision navigation solutions for subsea vehicles. The new XRT option is available with new

Location map for CGG’s rich-azimuth survey north-west of the Shetland Isles.
 (Photo: CGG)

CGG Deploys Two Vessels for Survey NW of Shetland

undershooting the volcanic intrusions and shallow unconformities present in the area. Two vessels, the Oceanic Vega and the Geo Caribbean, are being deployed. Each vessel operates triple sources using simultaneous source technology.The data will be processed in depth using CGG’s state-of-the-art broadband imaging technology, including advanced de-blending and Full-Waveform Inversion velocity modeling. The final data will be available in mid-2019

(L-R) Phil Middleton, Seatronics Group MD, with Andy Williamson from Underseasense (Photo: Seatronics)

Seatronics Doubles Its Stock of R2 Sonic Multibeam Systems

farm sector have seen a rise in hydrographic surveys all around the world. Responding to this increased need and to serve their customers with innovative solutions, Seatronics have more than doubled their stockholding of Sonic 2024 systems with an investment in excess of $2 million.The Sonic 2024 is a broadband - wideband high resolution shallow water multibeam echosounder. It provides user selectable operating frequencies between 170kHz and 450kHz with 1Hz increment, and optional 700 kHz.  It offers a beamwidth of 0.3° x 0.6° at 700kHz. In addition, like all R2Sonic MBES, the Sonic 2024

Cefas’ Wave Glider Lyra sailing away on the start of the 41 day mission after being deployed from RV Cefas Endeavour. (Photo: Cefas)

Scientists Complete 1700km Autonomous Acoustics Mission

for collecting data on fish stocks.The U.K.’s Centre for Environment, Fisheries and Aquaculture Science (Cefas) and U.S. based Liquid Robotics, A Boeing Company, have deployed, tested and recovered a remotely piloted Wave Glider, which was adapted to allow scientists to collect high quality broadband fisheries acoustics data.As part of a multi-vehicle mission under the U.K. NERC/Defra funded AlterEco project, the Wave Glider called Lyra was deployed in the central North Sea about 270km north-east of Newcastle-upon-Tyne, U.K. by RV Cefas Endeavour. She spent 41 days at sea, repeatedly covering

MainOne Cable System Map (Image: TE SubCom)

MainOne Cable System to Extend to Francophone Region

current digital transformation of the region by ushering in affordable connectivity to drive economic development. Our objective remains focused on bridging the digital divide between West Africa and the rest of the world. We have, and will continue to, invest significantly in projects to accelerate broadband access to help local businesses address the challenges they face procuring capacity at competitive rates. This extension of our subsea cable to Senegal and Cote D’Ivoire will further open up their international bandwidth markets, drive down costs and ultimately boost the economic and commercial

Photo: Polarcus Limited

Polarcus Extends Cooperation with TGS

part of this commitment. Additional awards under this commitment will be announced separately.   "This agreement will continue to leverage the core strengths and expertise of both parties," stated Duncan Eley, Polarcus CEO. "Polarcus acquired over 15,000 sq.km of high quality broadband 3D seismic data for TGS during 2017 and the collaboration will further drive vessel utilization in 2018."  

Map showing CGG’s 3D data coverage in the pre-salt area offshore Brazil. (Photo: CGG)

CGG Begins Deepwater Survey Offshore Brazil

CGG said it has commenced acquisition of a large broadband 3D multi-client survey in the pre-salt area of the deepwater Santos Basin. Santos VIII is the most recent survey in CGG’s vast ongoing pre-salt program that delivers ultramodern seismic data, enabling exploration companies to better evaluate pre-salt opportunities in advance of Brazil’s pre-salt licensing rounds.   Santos VIII covers an area of over 8,000 km2 adjacent to the Peroba, Pau Brasil and Boumerangue fields. The resulting BroadSeis data will be imaged with CGG’s advanced full-waveform inversion (FWI) technology

(File photo: Polarcus)

Polarcus Scores Two Seismic Survey Projects

Marine geophysical company Polarcus Limited announced it has secured two offshore seismic survey projects.The company said it has entered into a contract for a two-month broadband 3D marine seismic acquisition project in Australia that will commence immediately.Polarcus also received a letter of award for an XArray 3D marine seismic acquisition project in Asia Pacific. The two-month project is slated to begin immediately after the Australian project.“These awards in Asia Pacific provide important visibility, extending a regional campaign for Polarcus well into Q3 2018,” Polarcus said.

Martin Klein with a Klein  multibeam side scan sonar. “We were proud that side scan was able to finally replace the old wire drag technology.” (courtesy Martin Klein and the MIT Museum)

Klein's Side Scan Sonar, Then and Now

talk about these developments, but we are very focused on bringing them to the market.    You mentioned earlier the focus on producing photo-quality imaging. Will you discuss some of the evolutions that have recently taken place in this area? FC: Most of our new products are based on broadband technology which allows the image to have a much deeper, richer, tonal quality. Complementing this architecture is a number of signal and display processing improvements which further enhance the imagery.   Where do you see the greatest opportunities for growth? FC: From our perspective

Fig.1. Sodebo Ultim arrives home after Thomas Coville’s record-breaking trip. (Photo Credit: Team Sodebo)

Around the World in 49 Days

for measured winds. The latter are the vector sum of actual wind and boat velocities.   Sodebo selected Teledyne RDI’s Explorer DVL to meet these needs. This device uses a flat-faced phased-array transducer to measure speed-through-water with 0.3 percent accuracy. Moreover, the DVL’s BroadBand signaling outputs low-noise velocity measurements. Thus, the sailboat’s navigation system can benefit from high quality data at higher update rates than other DVLs supply.   For a boat that sees both warm tropical waters and chilly sub-polar seas, the phased array design of this DVL

Marine Technology Magazine Cover Jan 2019 - Underwater Vehicle Annual

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