Now showing items 31-40 of 48
Maritime surveillance with multiple over-the-horizon HFSW radars: an overview of recent experimentation
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 ...
Extended target tracking applied to X-band radar data
X-band marine radar systems are flexible and low-cost tools for monitoring multiple targets in a surveillance area. They are able to provide high resolution measurements in both space and time. Such features offer the ...
Single ping clutter reduction: segmentation using Markov random fields
(NATO. SACLANTCEN, 1999/03)
The use of low frequency active sonar in shallow water leads to large numbers of clutter detections. This high false alarm rate can overload automatic tracking and classification algorithms. Traditional detection algorithms ...
Towards fully autonomous underwater vehicles in ASW scenarios: an adaptive data driven AUV mission management layer
We present an adaptive, data driven Mission Management Layer (MML) to manage the phases (surveillance, track prosecution and target reacquisition) of the mission of AUVs operating as receiver nodes in a multistatic network ...
Detection, tracking and fusion of multiple HFSW radars for ship traffic surveillance: experimental performance assessment
Low-power HF surface-wave radars fit well the role of long-range early-warning tools in maritime situational awareness applications, by virtue of their over-the-horizon coverage capability and continuoustime mode of ...
Contact-level multistatic sonar data simulator for tracker performance assessment
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 ...
Ambiguity reduction of underwater targets in framework of topic modeling
An unsupervised track classification approach based on appropriate discriminative and aggregative features derived from beamformed and normalized matched-filtered data is applied to sonar multistatic tracking and extended ...
Knowledge-based ship tracking applied to HF surface wave radar data
In recent years, low-power high-frequency surface-wave radars have received significant attention thanks to their over-the-horizon coverage capability and the continuous-time operation mode. These radars have become effective ...
Distributed information fusion in multistatic sensor networks for underwater surveillance
Surveillance in antisubmarine warfare has traditionally been carried out by means of submarines or frigates with towed arrays. These techniques are manpower intensive. Alternative approaches have recently been suggested ...
EVA - an evaluator of vague evidence in ASW situations: an expert system prototype
(NATO. SACLANTCEN, 1987/10)
This paper presents an example of how an expert system can contribute to the creation and updating