Browsing by Author "Bryan, Karna"
Now showing items 1-9 of 9
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A Bayesian approach to predicting an unknown number of targets based on sensor performance
Bryan, Karna; Carthel, Craig (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 ... -
Adaptive filtering of imprecisely time-stamped measurements with application to AIS networks
Millefiori, Leonardo; Braca, Paolo; Bryan, Karna; Willett, Peter K. (CMRE, 2019/06)Driven by real-world issues in maritime surveillance, we consider the problem of estimating the target state from a sequence of observations that can be imprecisely time-stamped. That is, the time between two consecutive ... -
Context for maritime situation awareness
Jousselme, Anne-Laure; Bryan, Karna (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 ... -
Long-term vessel kinematics prediction exploiting mean-reverting processes
Millefiori, Leonardo; Braca, Paolo; Bryan, Karna; Willett, Peter K. (CMRE, 2019/06)Long-term target state estimation of non-manoeuvring targets, such as vessels under way in open sea, is crucial for maritime security. The dynamics of non-manoeuvring targets is traditionally modelled with a white noise ... -
Maritime situational awareness use cases enabled by space-borne sensors
Millefiori, Leonardo; Vivone, Gemine; Braca, Paolo; Cazzanti, Luca; Bryan, Karna (CMRE, 2019/06)This paper discusses a technique for predicting a vessel?s position over a long time horizon with much lower uncertainty than current methods. Lowering the uncertainty of long-range prediction is a key challenge in maritime ... -
Maritime surveillance with multiple over-the-horizon HFSW radars: an overview of recent experimentation
Braca, Paolo; Maresca, Salvatore; Grasso, Raffaele; Bryan, Karna; Horstmann, Jochen (CMRE, 2019/06)This paper briefly explores the high-frequency surface-wave (HFSW) radar technology in general, and Wellen radar (WERA) in more detail. Then it describes the multitarget tracking data fusion (MTTDF) network architecture ... -
Modeling vessel kinematics using a stochastic mean-reverting process for a long-term prediction
Millefiori, Leonardo; Braca, Paolo; Bryan, Karna; Willett, Peter K. (CMRE, 2019/06)We present a novel method for predicting long-term target states based on mean-reverting stochastic processes. We use the Ornstein-Uhlenbeck (OU) process, leading to a revised target state equation and to a time scaling ... -
Validation of the Ornstein-Uhlenbeck route propagation model in the Mediterranean Sea
Millefiori, Leonardo; Pallotta, Giuliana; Braca, Paolo; Horn, Steven A.; Bryan, Karna (CMRE, 2019/06)Traffic route analysis and prediction are both crucial to maritime security. The ability to predict a vessel position in the future is essential to provide information on upcoming events. However, accurate prediction along ... -
Vessel pattern knowledge discovery from AIS data: a framework for anomaly detection and route prediction
Pallotta, Giuliana; Vespe, Michele; Bryan, Karna (CMRE, 2014/01)Understanding maritime traffic patterns is key to Maritime Situational Awareness applications, in particular, to classify and predict activities. Facilitated by the recent build-up of terrestrial networks and satellite ...