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An interactive processing scheme is proposed to improve the target detection probability as well as the tracking performance of the radar system.
Abstract
Purpose
An interactive processing scheme is proposed to improve the target detection probability as well as the tracking performance of the radar system.
Design/methodology/approach
Firstly, with the spatial-correlated features extracted from the foreground and background statistical models, the thresholds were adapted to distinguish the dim small targets from clutters in the complex incoherent radar images. Then, the target trajectories were constructed with the target tracking algorithm. According to the temporal correlation with the target life cycle, the thresholding values were modified in the neighbourhood of the predicted positions to improve the detection sensitivity in these areas during the tracking process. Finally, the temporal-correlated features of the remained clutters were used to further reduce the false alarm rate.
Findings
The proposed algorithm was applied on the simulated data, as well as the image sequences obtained with the incoherent marine radars. The detection results demonstrated that the interactive algorithm could detect and track the dim small targets with relatively low false alarm rate.
Practical implications
The interactive processing scheme could be applied for low-altitude airspace surveillance with incoherent marine radar.
Originality/value
The proposed scheme outperforms the classical radar target detection algorithms and the state-of-the-art image processing algorithms for video-based surveillance.
Abstract
Details
Keywords
Weishi Chen, Yifeng Huang, Xianfeng Lu and Jie Zhang
This paper aims to review the critical technology development of avian radar system at airports.
Abstract
Purpose
This paper aims to review the critical technology development of avian radar system at airports.
Design/methodology/approach
After the origin of avian radar technology is discussed, the target characteristics of flying birds are analyzed, including the target echo amplitude, flight speed, flight height, trajectory and micro-Doppler. Four typical airport avian radar systems of Merlin, Accipiter, Robin and CAST are introduced. The performance of different modules such as antenna, target detection and tracking, target recognition and classification, analysis of bird information together determines the detection ability of avian radar. The performances and key technologies of the ubiquitous avian radar are summarized and compared with other systems, and their applications, deployment modes, as well as their advantages and disadvantages are introduced and analyzed.
Findings
The ubiquitous avian radar achieves the long-time integration of target echoes, which greatly improves detection and classification ability of the targets of birds or drones, even under strong background clutter at airport. In addition, based on the big data of bird situation accumulated by avian radar, the rules of bird activity around the airport can be mined to guide the bird avoidance work.
Originality/value
This paper presented a novel avian radar system based on ubiquitous digital radar technology. The authors’ experience has confirmed that this system can be effective for airport bird strike prevention and management. In the future, the avian radar system will see continued improvement in both software and hardware, as the system is designed to be easily extensible.
Details
Keywords
Huansheng Ning and Weishi Chen
– Bird strike risk (BSR) evaluation is a significant part of the avian radar system worldwide installed and operated at airports. The paper aims to discuss these issues.
Abstract
Purpose
Bird strike risk (BSR) evaluation is a significant part of the avian radar system worldwide installed and operated at airports. The paper aims to discuss these issues.
Design/methodology/approach
This paper proposed a method using the real-time avian radar data to evaluate BSR with the estimations of bird strike probability and severity. The probability estimation model considered the attributes of the relative positions of the flock and the runway, the altitude of the flock and the aircraft, the flight path of the aircraft, and the ability of the bird species to avoid collision. The severity was estimated by the combination of the Delphi method and the analytic hierarchy process (AHP), called DAHP, which took full advantage of the expert knowledge and quantitative calculation.
Findings
The model was tested successfully on the simulated data at Beijing Capital International Airport (BCIA) with three runways and real data at Beihai Fucheng Airport (BFA) with one runway.
Practical implications
The BSR evaluation model was specifically designed for the airports with avian radars. It enabled the airport managers to objectively evaluate the risk in real time and to take effective measures.
Originality/value
The proposed BSR evaluation model was constructed with the real-time features of birds and aircraft based on the DAHP framework, providing scientific guidance for aviation safety and environmental management at the airport.
Details
Keywords
SungKwan Ku, Hojong Baik and Taehyoung Kim
The surveillance equipment is one of the most important parts for current air traffic control systems. It provides aircraft position and other relevant information including…
Abstract
Purpose
The surveillance equipment is one of the most important parts for current air traffic control systems. It provides aircraft position and other relevant information including flight parameters. However, the existing surveillance equipment has certain position errors between true and detected positions. Operators must understand and account for the characteristics on magnitude and frequency of the position errors in the surveillance systems because these errors can influence the safety of aircraft operation. This study aims to develop the simulation model for analysis of these surveillance position errors to improve the safety of aircrafts in airports.
Design/methodology/approach
This study investigates the characterization of the position errors observed in airport surface detection equipment of an airport ground surveillance system and proposes a practical method to numerically reproduce the characteristics of the errors.
Findings
The proposed approach represents position errors more accurately than an alternative simple approach. This study also discusses the application of the computational results in a microscopic simulation modeling environment.
Practical implications
The surveillance error is analyzed from the radar trajectory data, and a random generator is configured to implement these data. These data are used in the air transportation simulation through an application programing interface, which can be applied to the aircraft trajectory data in the simulation. Subsequently, additionally built environment data are used in the actual simulation to obtain the results from the simulation engine.
Originality/value
The presented surveillance error analysis and simulation with its implementation plan are expected to be useful for air transportation safety simulations.
Details
Keywords
Some aircraft runway collisions are described first to illustrate some common features of a runway incursion (RI) incident. Then, using the FAA definition of runway incursion…
Abstract
Some aircraft runway collisions are described first to illustrate some common features of a runway incursion (RI) incident. Then, using the FAA definition of runway incursion, some data relating to RI incidents are presented to show that both RIs and incursion rates are growing steadily in the USA. Data for UK airport operations also indicate that the incursion rates in Britain are of the same order. Hence there is a need for some form of RI prevention. Most of the technological prevention systems available, or being developed, are briefly described before the paper concludes with the suggestion that effective prevention may be more swiftly obtained by improving airside signage and training for airport workers who use runways and taxiways in their vehicles.
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RACAL Avionics today announces the commissioning of its ground movement radar ASMI 18X at Luton International Airpot. This latest announcement forms part of a total contract worth…
Abstract
RACAL Avionics today announces the commissioning of its ground movement radar ASMI 18X at Luton International Airpot. This latest announcement forms part of a total contract worth £750,000, issued to Racal in 1986 to update Luton's navigation and landing aids and give a substantial boost to its enviable safety record.