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Global Navigation Satellite Systems

In this feature the current status and future development of four Global Navigation Satellite Systems (GNSS) are briefly presented. These four systems are the American Global Positioning System (GPS), the...

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Global Navigation Satellite Systems

The concept of GNSS was first introduced by the European Space Agency (ESA), the European Commission (EC) and Eurocontrol in the early nineties. They defined requirements for a European GPS...

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Following a Legacy

At the invitation of Prince Albert I, the Principality of Monaco has been the headquarters of the International Hydrographic Organization since 1921. Looking at the annual reports of the International...

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Recent Developments in Airborne Lidar

The arrival of airborne Lidar, also referred to as airborne laser scanning (ALS), has revolutionized area-wide 3D data acquisition of topography, bathymetry, vegetation, buildings and infrastructure. This article presents an...

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Underwater Noise Monitoring in the North Sea

Sound is of vital importance for marine animals. Eleven institutes from the countries bordering the North Sea have joined forces in the Jomopans project to implement a novel monitoring strategy for underwater sound. Due to the increase in human activities in the sea, sound pollution is a growing concern for marine environmental managers. High levels of anthropogenic noise disturb animals, but the integrated impact of noise on the marine ecosystem is largely unknown. In the Joint Monitoring Programme of Ambient Noise in the North Sea (Jomopans) project, measurements at sea are combined with noise maps from numerical modelling to assess the quantitative levels of sound at sea. Sound is of vital importance for marine animals. Eleven institutes from the countries bordering the North Sea have joined forces in the Jomopans project to implement a novel monitoring strategy...

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Synthetic Aperture Sonar Challenges

Synthetic aperture sonar (SAS) has been under active development for decades. The technique is particularly well suited for autonomous underwater vehicles, and it is expected that SAS will replace traditional...

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Challenging GNSS Vulnerability?

The reasons for GPS vulnerability due to interference are explained and reasons behind the system being designed as it is today discussed. In addition, consideration is given to why some...

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Gold, Glory, and — HYDRO!

This month marks the 555th anniversary of the death of Prince Henry of Portugal, known as the Navigator, on 13 November 1460. Henry had set in motion a series of...

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Hydro Dam Inspection by ROVs

The inspection and maintenance of vital resource facilities is an integral part of any regional health and stability management programme. Providing consistent quality output whilst reducing inspection and maintenance costs...

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