CGG Satellite Mapping Completes Barents Sea Seeps Study

CGG’s Satellite Mapping group recently completed an innovative high-resolution hydrocarbon seeps study commissioned by the Norwegian Petroleum Directorate (NPD). The aim of the study was to increase petroleum system knowledge across a relatively data-poor area of the northern Barents Sea. CGG Satellite Mapping has over 25 years of experience in the detection and characterization of offshore seeps and slicks based on its expert remote sensing processing and analysis of Synthetic Aperture Radar (SAR) satellite imagery. To meet the requirements of the study, CGG Satellite Mapping custom-tasked next-generation SAR satellites to acquire a large collection of high-spatial-resolution SAR imagery at a high... (read more)
2021-01-15 01:32:28

Sub-bottom Object Detection

An Update on the Main Innovations of the Past Years
While nautical charting mainly focuses on bathymetry and objects that form a hazard to shipping, offshore construction and dredging require sub-bottom information. There is nothing worse in any project than finding wrecks or unexploded ordnance (UXO) after construction has started. The detection of covered cables and pipelines is also an important survey objective. There have been some interesting innovations in this field over the past years and, while this article does not attempt to be exhaustive, it provides an overview of the various types of system available. The Sub-bottom Profiler The classic instrument for detecting bottom layers and sub-bottom objects... (read more)
2020-12-11 11:34:08

Sea-level Monitoring Satellite First Results Surpass Expectations

Launched less than three weeks ago, the Copernicus Sentinel-6 Michael Freilich satellite has not only returned its first data, but results also show that it is functioning far better than expected. Thanks to its new, sophisticated altimetry technology, Sentinel-6 is poised to deliver exceptionally precise data on sea-level height to monitor the worrying trend of sea-level rise. Sentinel-6 Michael Freilich was lofted into orbit on 21 November 2020 from California. After it had sent back its first signal showing that it was alive and well in space, ESA’s Operations Centre in Germany took care of the satellite’s first few days... (read more)
2020-12-11 10:46:59

Iceberg A-68A: Hit or Miss?

An enormous iceberg, called A-68A, has made headlines over the past weeks as it drifts towards South Georgia in the Southern Ocean. New images, captured by the Copernicus Sentinel-1 mission, show that the berg is rotating and potentially drifting westwards. In July 2017, the lump of ice more than twice the size of Luxembourg broke off Antarctica’s Larsen C ice shelf – spawning one of the largest icebergs on record. Now, three years later, the A-68A berg is being carried by currents in open waters – thousands of kilometres from its birthplace. The Copernicus Sentinel-1 mission’s latest acquisition, captured on 25 November, shows the... (read more)
2020-11-30 10:10:53

Norbit Aptomar Acquires SeaDarQ Radar System for Environmental Monitoring

Nortek has announced the sale of its SeaDarQ radar technology for environmental monitoring and oil spill detection to Norbit Aptomar, a technology provider to global maritime markets. Norbit, which is headquartered in Trondheim, Norway, will integrate the SeaDarQ software with its existing SeaCOP environmental monitoring system. The SeaCOP system combines remote sensing technologies – such as radar, infrared cameras and sonars – with state-of-the-art data fusion and artificial intelligence. Using a high-resolution marine X-band radar, the Norbit Aptomar SeaDarQ system can automatically detect, track and monitor oil spills on the ocean surface. Detection and Tracking Algorithms Nortek’s subsidiary in the Netherlands... (read more)
2020-11-09 09:40:42

State of the Art in Multibeam Echosounders

The Evolution of a Bathymetric Workhorse
Although the single beam echosounder is still in use, it has over the last 25 years gradually been replaced with new and less expensive multibeam echosounder (MBES) systems. And, although some side-scan sonar (SSS) systems also offer bathymetry, the MBES is the go-to system when it comes to bathymetry today. MBES technology has gone through an evolution rather than a revolution in recent years. In this article, we focus on the current state of the art for this bathymetric workhorse. The Multibeam Echosounder The main function of an MBES is to detect a number of depths along a swath of... (read more)
2020-10-30 08:32:19

MOSAiC Arctic Expedition Reaches North Pole

On 19 August 2020, the world’s largest and longest polar research expedition – known as MOSAiC – reached the North Pole after making an unplanned detour owing to lighter than usual sea-ice conditions. The expedition is now entering its final stage, during which researchers will study the last piece of the Arctic puzzle: the growth of new sea ice marking the end of the summer season. In September 2019, the German research icebreaker Polarstern set sail from Tromsø, Norway, to spend a year drifting through the Arctic Ocean – trapped in ice. After leaving the ice floe it had been... (read more)
2020-09-22 10:51:01

How Copernicus Sentinel-6 Will Monitor the Oceans

Rate of Sea-level Rise Accelerates
With millions of people around the world at risk from rising seas, it is essential to continue measuring the changing height of the sea surface to ensure that decision makers are equipped to take appropriate mitigating action. Copernicus Sentinel-6, a new satellite, will take the lead in charting sea-level change. Sentinel-6 carries a radar altimeter to provide high-precision and timely observations of the topography of the global ocean. This information is essential for the continued monitoring of changes in sea level, a key indicator of climate change. It is also essential for operational oceanography. ESA’s director of Earth Observation Programmes, Josef Aschbacher, said at... (read more)
2020-08-28 10:10:46

Sea-level Charting Satellite Passes with Flying Colours

The Copernicus Sentinel-6 Michael Freilich satellite has been put through a series of strenuous tests leaving the eyes of the teams involved in this international mission set firmly on its final results. Happily, Sentinel-6 has passed with flying colours and engineers can now prepare it for shipment to the US for liftoff on a SpaceX Falcon-9, which is scheduled for 10 November. Renamed in honour of Michael H. Freilich, who led NASA’s work in Earth science, Copernicus Sentinel-6 Michael Freilich will take over the critical role of monitoring sea-level change by extending the long-term measurement record of global sea level... (read more)
2020-07-23 03:05:39

New Autonomous Guard Vessel Concept Design to Revolutionize Offshore Wind Industry

The concept design of an Autonomous Guard Vessel (AGV) revealed earlier this month could well revolutionize the offshore industry. The futuristic-looking design has been created by a consortium of maritime companies looking to support the offshore industry by exploiting technology available today. The novel design is smaller and lighter than most current guard vessels used to protect offshore operations and boasts sustainable solutions while exploiting the benefits of autonomous shipping. In addition, the AGV is set to operate more efficiently as well as require lower operating costs due to no crew being required. This clean and lean concept to replace conventional... (read more)
2020-07-13 09:50:39
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