Browsing CMRE Publications by Title
Now showing items 228-247 of 882
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Comparison of CONGRATS ray tracing predictions with MEDUSA measurements of reverberation
(NATO. SACLANTCEN, 1971/12)From the user's point of view, ray tracing is just a computer procedure which is inserted into larger programs of different degrees of complexity . The following table indicates in which kind of programs this procedure is ... -
Comparison of measured reverberation on the transmission loss data with modelled results on the West Florida continental shelf
(NATO. SACLANTCEN, 1993/08)Acoustic data from the September, 1992 Area Characterization Test (ACT I) are compared to ADAM (Advanced Development Acoustic Model) output. Conduct of harsh shallow water acoustic exercises, and data interpretation mandates ... -
Comparison of propagation measurements obtained using the MEDUSA system with computer modelled data
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Comparison of ray tracing predictions with wideband propagation measurements
(NATO. SACLANTCEN, 1971/12)The paper gives an illustration of the latest methods which have been developed at SACLANTCEN for the experimental study of sound propagation in deep water. They are based on a high sampling of the sound field produced by ... -
Comparison of satellite-retrieved sea-surface temperatures with drifter and ship-borne measurements
(NATO. SACLANTCEN, 1996/01)Sea-surface temperatures (SST) retrieved from satellite imagery are compared with in-situ measured data. The satellite data are from the Advanced Very High Resolution Radiometer (AVHRR) of the series of NOAA satellites, ... -
Computer models for underwater sound propagation
(NATO. SACLANTCEN, 1975/10)The state of affairs of computer models for underwater sound propagation loss estimation is discussed from the viewpoints of two segments of the sonar community; i.e., (1) those who develop the models and are primarily ... -
Conference Proceedings of the Decision Support and Risk Assessment for Operational Effectiveness (DeSRA) 2017 Conference
(NATO. STO CMRE, 2019-01)The Decision Support and Risk Assessment for Operational Effectiveness (DeSRA) 2017 Conference Proceedings contain the peer-reviewed abstracts accepted for this conference. The DeSRA 2017 Conference took place at the ... -
Conference proceedings of the Sixth Workshop on Military Applications of Underwater Glider Technology (6WMAUGT)
(CMRE, 2020-04)Under the sponsorship of the Innovation Branch at NATO Allied Command Transformation, NATO STO Centre for Maritime Research and Experimentation (CMRE) organized the sixth Workshop on Military Applications of Underwater ... -
Connection between the solution of the Helmholtz and parabolic equations for sound propagation
(NATO. SACLANTCEN, 1975/10)Using a conformal mapping technique in a rectangular waveguide, we present an exact integral relation between the solutions of the Helmholtz equation whose sound speed c(x,y) varies as a function of both depth y and range ... -
Considerations on numerical and experimental propagation models for two-dimensional variations of medium properties
(NATO. SACLANTCEN, 1971/12)One of the problems the FWG is dealing with is the prediction of sound propagation loss in shallow water. A part of this problem is being treated by bringing measurements and numerical computation into relationship. -
Considerations related to warfare system design and operation of tactical platforms in a low- frequency active sonar environment
(NATO. SACLANTCEN, 1993/08)Low-Frequency Active Sonar System (LFASS) can provide significant improvements in the detection, localization and classification of very quiet submarine contacts. Achievement of the predicted performance improvements will ... -
Considerations relating to the calculation of sound velocity
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Consistent estimation of randomly sampled Ornstein-Uhlenbeck process long-run mean for long-term target state prediction
(CMRE, 2019/06)In this letter, we study the problem of estimating the long-run mean of the Ornstein-Uhlenbeck (OU) stochastic process and its effect on the long-term prediction of future vessel states, which is a crucial problem for ... -
Contact-level multistatic sonar data simulator for tracker performance assessment
(NURC, 2006/08)This paper provides an overview of a multistatic sonar contact-data simulation approach and a dataset generated specifically for tracker algorithm evaluation by the Multistatic Tracking Working Group (MSTWG). A brief ... -
Context for maritime situation awareness
(CMRE, 2019/06)Effective maritime situation awareness (MSA) relies on high-level information fusion tasks that benefit from a formal approach to context-based reasoning. This chapter discusses the relative notion of context through the ... -
Continuous active sonars for littoral undersea surveillance
(CMRE, 2019/05)Recent advances in transducer and computing technology have pushed the concept of continuous active sonar (CAS) or high duty cycle sonar as an area of interest for application to antisubmarine warfare. Unlike conventional ... -
Continuous recording of active sonar data
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Converted measurements Bayesian extended target tracking applied to X-band marine radar data
(CMRE, 2019/06)X-band marine radar systems are flexible and low-cost tools for monitoring multiple targets in a surveillance area. They can provide high resolution measurements both in space and time. Such features offer the opportunity ... -
Converted measurements random matrix approach to extended target tracking using X-band marine radar data
(CMRE, 2019/06)Conventional tracking algorithms rely upon the hypothesis of one detection per target for each frame. However, very fine spatial resolution radars represent widespread systems that provide data for which this hypothesis ... -
Cooperation and networking in an underwater network composed by heterogeneous assets
(CMRE, 2019/06)Underwater communication and robot technologies have grown rapidly in the last decade. Systems made of underwater unmanned vehicles have moved from single vehicle deployments to systems comprising teams of assets. As of ...