PROJECT TITLE :
Knowledge-Based Multitarget Ship Tracking for HF Surface Wave Radar Systems
These last decades spawned a nice interest toward low-power high-frequency (HF) surface-wave (SW) radars for ocean remote sensing. By virtue of their over-the-horizon coverage capability and continuous-time mode of operation, these sensors are effective long-vary early warning tools in maritime situational awareness applications providing an extra source of knowledge for target detection and tracking. Unfortunately, they additionally exhibit several shortcomings that require to be taken into consideration, and proper algorithms need to be exploited to overcome their limitations. During this paper, we tend to develop a data-based mostly (KB) multitarget tracking methodology that takes advantage of a priori data on the ship traffic. This a priori data is given by the ship sea lanes and by their related motion models, which together represent the essential building blocks of a variable structure interactive multiple model procedure. False alarms and missed detections are handled employing a joint probabilistic data association rule and nonlinearities are handled by means of the unscented Kalman filter. The KB-tracking procedure is validated using real knowledge acquired during an HF-radar experiment within the Ligurian Ocean (Mediterranean Sea). 2 HFSW radar systems were operated to develop and take a look at target detection and tracking algorithms. The performance is defined in terms of time-on-target, false-alarm rate (WAY), track fragmentation (TF), and accuracy. A full statistical characterization is provided using one month of information. A important improvement of the KB-tracking procedure, in terms of system performance, is demonstrated in comparison with a customary joint probabilistic knowledge association tracker recently proposed in the literature to trace HFSW radar information. The main improvement of our approach is the higher capability of following targets without increasing the FAR. This increment is a lot of additional evident within the reg- on of low SO MUCH, where it can be over the 30% for each the HFSW radar systems. The KB-tracking exhibits on average a discount of the TF of about the 20% and also the thirteen% of the used HFSW-radar systems.
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