Browsing Reprints by Title
Now showing items 167-186 of 548
-
Deterministic methods of sound field computation
(NATO. SACLANTCEN, 1975/10)Models for acoustic propagation in the ocean environment have matured to a level where they are used routinely to estimate deterministic phenomena and, most recently, have been applied to the investigation of stochastic ... -
Deterministic propagation modelling: Part 1: Fundamental principles *Part 2: Numerical results
(NATO. SACLANTCEN, 1981/06)The physics of sound propagation in the ocean is briefly reviewed. The wave equation is presented and a set of solutions under a variety of approximations is discussed. The consistency among these solutions is illustrated. -
Development of a software-defined and cognitive communications architecture at CMRE
(2019/05)This paper presents an overview of the functionalities of the Cognitive Communications Architecture (CCA) that is currently under development at the NATO Science and Technology Organisation (STO) Centre for Maritime Research ... -
Development of military ARGUS computers and MOD bus for close-coupled signal processing applications
(NATO. SACLANTCEN, 1979/12)The next generation of Naval sonar systems will make extensive use of flexible programable modules to implement signal-processing algorithms. A number of UK Defence Establishments are engaged in a series of coordinated ... -
Different approaches to economic cruising speeds on a CODOG frigate with due regard to radiated noise
(NATO. SACLANTCEN, 1985/01)All navies, in recent years, have been much more concerned in economic cruising speeds of ships. Frigate type naval ships are usually characterized by two shafts, by multiple propulsion engines per shaft, and by different ... -
Digital acoustical processing at Woods Hole Oceanographic Institution
(NATO. SACLANTCEN, 1972/05) -
Digital signal processing of high resolution within-pulse sector scanning sonars
(NATO. SACLANTCEN, 1979/12)The characteristics of three scanning sonars, presently in use at the Admiralty Marine Technology Establishment, and operating at frequencies of 300kHz, 150kHz and 75kHz are described. The performance of a system for ... -
Directional measurements of low-frequency acoustic backscattering from the seafloor
(NATO. SACLANTCEN, 1986/06)Long-range, low-frequency directional measurements of acoustic backscattering from the seafloor were made in the Tyrrhenian Sea using explosi ve sound sources. The signals were received by a horizontal towed array of ... -
Display techniques
(NATO. SACLANTCEN, 1979/12)This paper sets out to review current sonar information displayc and to indicate how technological advances over the past decade lead to the concept of a common information display console. To appreciate the problems ... -
Dissecting uncertainty-based fusion techniques for maritime anomaly detection
(CMRE, 2019/06)Detecting and classifying anomalies for Maritime Situation Awareness gets a lot of benefit from the combination of multiple sources, correlating their output for detecting inconsistencies in vessels' behaviour. Adequate ... -
A distributed approach to estimating sea port operational regions from lots of AIS data
(CMRE, 2019/06)Seaports play a vital role in the global economy, as they operate as the connection corridors to all other modes of transport and as engines of growth for the wider region. But ports today are faced with numerous unique ... -
A distributed framework for embedded collaborative autonomy
(CMRE, 2019/05)We have designed and implemented a framework for the development and deployment of multi-agent task allocation solutions, with particular awareness of the operational constraints encountered by Unmanned Maritime Systems ... -
Distributed information fusion in multistatic sensor networks for underwater surveillance
(CMRE, 2019/06)Surveillance in antisubmarine warfare has traditionally been carried out by means of submarines or frigates with towed arrays. These techniques are manpower intensive. Alternative approaches have recently been suggested ... -
Distributed information fusion in multistatic sensor networks for underwater surveillance
(CMRE, 2017/11)Surveillance in antisubmarine warfare has traditionally been carried out by means of submarines or frigates with towed arrays. These techniques are manpower intensive. Alternative approaches have recently been suggested ... -
Distributed underwater glider network with consensus Kalman filter for environmental field estimation
(CMRE, 2019/06)A distributed coordinated dynamic sensor network for optimal environmental field estimation is proposed and tested on simulated and real data. The architecture is used to distribute the estimation of 3D timevarying fields ... -
A document-based data model for large scale computational maritime situational awareness
(CMRE, 2019/06)Computational Maritime Situational Awareness (MSA) supports the maritime industry, governments, and international organizations with machine learning and big data techniques for analyzing vessel traffic data available ... -
Doppler passive fathometry
(CMRE, 2019/05)Passive fathometry is a technique whereby broadband ambient ocean noise received on an array of hydrophones is averaged and cross-correlated to produce a sub-bottom profile [Siderius, Harrison, and Porter (2006). J. Acoust. ... -
Dynamic attenuation extraction of seafloor sediments from very high resolution acoustic data
(NATO. SACLANTCEN, 1997)An approach to acquire geophysical information of seabed sediments as derrved from acoustic attenuation rs described. Using thefrequencies corresponding to the signal power spectrum maximum and a point 3 dB below, signal ... -
Dynamic placement of a constellation of surface buoys for enhanced underwater positioning
(CMRE, 2019/06)This paper addresses the challenge of dynamically adapting the location of the nodes in an acoustic network to optimise the localisation performance of Autonomous Underwater Vehicles (AUVs) operating in the area. A dynamic ... -
Dynamic underwater glider for environmental field estimation
(CMRE, 2019/06)A coordinated dynamic sensor network of autonomous underwater gliders to estimate three-dimensional time-varying environmental fields is proposed and tested. Integration with a network of surface relay nodes and asynchronous ...