CMRE Publications: Recent submissions
Now showing items 281-300 of 882
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Benchmark analysis of NURC multistatic tracking capability
(NURC, 2006/08)This paper provides a brief description and performance results for the multistatic sonar trackers developed at NURC. Our analysis is based on common data distributed as part of the Multistatic Tracking Working Group ... -
Impact of seafloor and water column parameter variations on signal-to-background ratio estimates: a sensitivity study based on sonar performance modeling
(NURC, 2006/08)Regardless of how accurate modeling can be, if the set of assumptions made with regard to the propagation conditions are not precise, sonar performance predictions diverge from the corresponding measured values. Here a ... -
The Maltese oceanic front: a surface description by ship and aircraft
(NATO. SACLANTCEN, 1972/09)Simultaneous observations by ship and aircraft of an oceanic fronta ! zone east of Malta in May 1971 show a predominatly north-south boundary between two water masses evidently formed by surface water from the western ... -
A Bayesian approach to predicting an unknown number of targets based on sensor performance
(NURC, 2006/08)Estimating remaining targets after some attempt has been made to detect an overall, unknown number of targets is critical to determining the potential threat associated with these remaining targets. This paper presents a ... -
At-sea measurements of diver target strengths at 100 Khz: measurement technique and first results
(NURC, 2006/08)During a recent at-sea trial of a diver detection system, the opportunity was taken of developing a technique for in-situ measurement of diver target strengths. The technique was based on making the diver perform circular ... -
The dynamics of information fusion: synthetic versus misassociation
(NURC, 2006/08)Fusion entails both the association and synthesis of information. If missassociations occur, they obviously undermine the gains won by synthesis, compromising the fusion product. An analytic framework is presented here to ... -
Geo-spatial tactical decision aid systems: fuzzy logic for supporting decision making
(NURC, 2006/08)Tactical decision aid systems support -
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 ... -
Benchmark evaluation of multistatic trackers
(NURC, 2006/08)This paper provides an overview of the Special Session on Multistatic Sonar and Radar Tracking at FUSION 2006. This includes background on the Multistatic Tracking Working Group, a brief description of the datasets and ... -
Autonomous underwater vehicles for port protection
(NURC, 2006/07)NATO's present capability to deal with a terrorist threat to our ports is slow, dangerous, and inefficient. Ports are a challenging area within which to conduct MCM operations due to several factors: shipping movements, ... -
The structure of fronts in the seasonal thermocline
(NATO. SACLANTCEN, 1972/09)Some years ago, when the first continuous profiling temperaturesalinity- depth probes came available it was discovered that tht thermocline had a layered structure. The thickness of these layers was a few metres and ... -
Multi-waveform active sonar tracking
(NURC, 2007/06)This paper extends the NURC distributed multihypothesis -
Multipath pulse shapes in shallow water: theory and simulation
(NURC, 2007/04)In shallow water propagation the steeper ray angles are weakened most by boundary losses. Regarding the sound intensity as a continuous function of angle it can be converted into a function of travel time to reveal the ... -
Separability of seabed reflection and scattering properties in reverberation inversion
(NURC, 2007/02)Separation of scattering properties (Lambert's mu) from reflection properties (the reflection loss angle derivative alpha) presents difficulties in the geoacoustic inversion of long range reverberation in isovelocity ... -
A study of the uncertainty in estimate seabed properties as a result of goeacoustic inversion algorithms
(NATO. SACLANTCEN, 2003/10)This paper investigates the inherent uncertainty in estimated seabed properties derived from matched-field geoacoustic inversion algorithms. This algorithm-induced uncertainty must be considered when interpreting inversion ... -
Signal and reverberation formulae including refraction
(NATO. SACLANTCEN, 2003/04)Because reverberation is an incoherent process it is possible to base realistic solutions on very simple flux theory. This report extends the closed-form signal and reverberation formulae of an earlier report [SACLANTCEN ... -
Annual Progress Report 2004
(NURC, 2005) -
Project 03F - 1: phase 1 completion report
(NATO. SACLANTCEN, 2002/12)This report describes the results of Phase I of Project 03F-1. The overall aim of this project is to -
Broadband signal simulation in shallow water
(NATO. SACLANTCEN, 2002/12)Today's minimum requirements for ocean acoustic models are to be able to simulate broadband signal transmissions in 2D varying environments with an acceptable computational effort. Standard