Browsing by Title
Now showing items 217-236 of 882
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Channel-adapted source for shallow water
(NATO. SACLANTCEN, 1993/08)In shallow water areas the utilization of active sonar is complicated by the fact that in these environments the performance of active systems is degraded by source signal interaction with channel boundaries. These boundary ... -
Channel-sensitive processor: development and detection performance evaluation
(NATO. SACLANTCEN, 1997/03)A Channel Sensitive Processor (CSP) which improves upon the detection performance of the traditional matched filter is developed. This method compensates for the performance degradation of the matched filter due to dense ... -
Characteristics of the mediterranean seagrass Posidonia oceanica contributing to high-frequency acoustic scattering
(NATO. SACLANTCEN, 2000/05)Posidonia oceanica meadows are the most important ecosystem for the life cycle of coastal Mediterranean benthos with a fundamental role in the primary production of the neritic system and a decisive influence on other ... -
Classification of odontocete buzz clicks using a multi-hypothesis tracker
(NURC, 2009/12)Blainville's beaked whale (Mesoplodon densirostris) buzz clicks have been found to have characteristics that can vary significantly. While we have not succeeded to classify them individually, we find that their spectrum ... -
CMRE 60th anniversary 1959 - 2019
(CMRE, 2019-10)This book has been published in recognition of the significant accomplishments achieved by the Centre of Maritime Research and Experimentation over the past 60 years. Thank you to the Centre's staff, scientists, engineers, ... -
Collaborative hybrid ARQ for CDMA-based reliable underwater acoustic communications
(CMRE, 2019/05)Achieving high throughput and reliability in underwater acoustic networks is a challenging task due to the bandwidth-limited and unpredictable nature of the channel. In a multi-node structure, such as in the Internet of ... -
Collaborative multistatic ASW using AUVs: demonstrating necessary technologies
(NURC, 2009/12)Many research laboratories and several nations are showing an interest in the 'underwater networked battlespace' in which a combination of stationary and mobile underwater platforms communicate wholly or partially by the ... -
Comments on the ray theory approximation
(NATO. SACLANTCEN, 1971/12) -
A communications and relative navigation architecture for underwater vehicle coordination
(CMRE, 2019/06)This paper presents an implementation of a communications stack for underwater communications and relative localisation. The application scenario, under the auspices of the EC MORPH project, is described. The high-level ... -
Comparative calibration programme within NATO countries
(NATO. SACLANTCEN, 1963/11)A NATO inter-laboratory programme of comparative hydrophone calibration is described including a description of the calibration facilities and methods of the participants. Hydrophones Type H29, F31, and F36 from the US ... -
Comparison of a time domain spectral collocation method and the time-evolution backscatter model BORIS
(NATO. SACLANTCEN, 1997/11)A model based on the time-domain spectral collocation method has been implemented at Forsvarets -
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
(NATO. SACLANTCEN, 1971/12) -
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 ...