The Probability of Overlap in the Vertical Dimension

1984 ◽  
Vol 37 (1) ◽  
pp. 117-124
Author(s):  
S. Nagaoka
Keyword(s):  
Data Collection ◽  
Traffic Control ◽  
Air Traffic Control ◽  
Risk Model ◽  
Air Traffic ◽  
Vertical Dimension ◽  
Collision Risk

The mathematical collision risk model developed by Reich can be used for evaluating the current air traffic control (ATC) separation minima. This model requires such parameters as volume of traffic, navigational errors of aircraft and the structure of routes. The navigational errors are closely related to the probability of overlap, which is one of the most important parameters for the model.Distributions of navigational errors have been studied by many researchers since the advent of the collision risk model. Because data collection on the navigational errors in the vertical dimension is expensive and time-consuming, there are few examples of observed data. Thus, at present, data on the probability of overlap in the vertical dimension are not available in a large enough sample to derive any conclusions.

Longitudinal Collision Risk Assessment of Paired Departure to Closed Spaced Parallel Runways

2014 ◽  
Vol 1030-1032 ◽  
pp. 2028-2033
Author(s):  
Zhao Ning Zhang ◽  
Hui Qiao ◽  
Ting Ting Lu
Keyword(s):  
Risk Assessment ◽  
Traffic Control ◽  
Air Traffic Control ◽  
Safety Assessment ◽  
Error Distribution ◽  
Air Traffic ◽  
Assessment Model ◽  
Collision Risk ◽  
Safety Operation ◽  
Calculation Models

Paired departure to closed spaced parallel runways can effectively improve capacity of terminal, and also can solve congestion of busy airport, but it also increases the complexity of air traffic control .For ensuring safety operation of paired departure, the longitudinal collision risk of paired departure to closed spaced parallel runways was studied. Based on the acceleration error distribution and requirements on wake avoidance during paired departure, a longitudinal collision risk safety assessment model of closed spaced parallel runways paired departure was built. The parameters in this model were determined by providing the calculation models. In the end, an example was calculated to verify the model, and it turns out that this model is feasible.

Mathematical Studies on Separation Standards

1971 ◽  
Vol 24 (4) ◽  
pp. 456-458
Author(s):  
D. E. Lloyd
Keyword(s):  
Traffic Control ◽  
Air Traffic Control ◽  
Mathematical Theory ◽  
Air Traffic ◽  
Control Environment ◽  
Collision Risk ◽  
Separation Standards ◽  
Navigation Accuracy ◽  
Mathematics Department ◽  
The Way

In a procedural Air Traffic Control environment, navigation standards are related to separation standards because of the way they both affect the collision risk. The Air Traffic Studies division of the Mathematics Department at R.A.E. has developed methods of estimating the collision risk procedural systems and these provide rational grounds for decisions on separation standards. In a radar-monitored system navigation accuracy and separation standards both affect the workload of the controller on the ground and it is necessary to study these effects to ensure that he is not overloaded. In addition the problems of estimating the collision risk will become more complicated. I shall very briefly describe the mathematical theory of collision risk for parallel tracks. A fuller description has been published in the Journal.

Evaluating the Feasibility of a Radar Separation Minimum for a Long-Range SSR

1989 ◽  
Vol 42 (3) ◽  
pp. 403-416 ◽  
Author(s):  
Sakae Nagaoka ◽  
Osamu Amai ◽  
Yasuo Watanabe
Keyword(s):  
Long Range ◽  
Traffic Control ◽  
Analytical Method ◽  
Surveillance System ◽  
Air Traffic Control ◽  
Close Approach ◽  
Air Traffic ◽  
Estimation Accuracy ◽  
Collision Risk ◽  
Comparing Distributions

This paper deals with an analytical method for establishing a separation minimum for air traffic control using a monopulse SSR (Secondary Surveillance Radar), namely the Long Range SSR (LSSR), of which coverage is extended to 250 n.m. The azimuth estimation accuracy of the monopulse SSR was significantly improved compared with that of conventional SSR.As an index of a collision risk due to azimuth errors of the LSSR, the close approach probability (CAP) associated with the probability of overlap of aircraft in azimuth is used for evaluating the safety of the surveillance system. The CAPs for both the LSSR and the conventional SSR are estimated by modelling and comparing distributions of azimuth errors. The CAP for the LSSR is significantly smaller than that for the conventional one under 5 n.m. separation minimum.

Estimating the Pressure Altitude of Aircraft by Radar

1984 ◽  
Vol 37 (2) ◽  
pp. 209-216
Author(s):  
Sakae Nagaoka
Keyword(s):  
Data Collection ◽  
Measurement System ◽  
Traffic Control ◽  
Risk Model ◽  
Collision Risk ◽  
Expected Number ◽  
Accuracy Measurement ◽  
Separation Standards ◽  
Navigation Accuracy ◽  
Pressure Altitude

A mathematical collision risk model can be used for evaluating air traffic control (ATC) separation standards. As one of the parameters required for calculating the expected number of collisions by this model, the probability of overlap in the vertical dimension based on height-keeping errors of aircraft must be estimated.However, there are few examples of empirical data on height-keeping errors because data collection is expensive and time-consuming. In order to collect these data, the author et al. started data collection using a newly developed simple height-finding radar, the navigation accuracy measurement system (NAMS) which has been installed under a trunk airway in Japan.

Workload Perception of Air Traffic Control Officers and Pilots During Continuous Descent Operations Approach Procedures

2019 ◽  
Vol 9 (1) ◽  
pp. 2-11
Author(s):  
Marina Efthymiou ◽  
Frank Fichert ◽  
Olaf Lantzsch
Keyword(s):  
Fuel Consumption ◽  
Traffic Control ◽  
Air Traffic Control ◽  
Negative Impact ◽  
Air Traffic ◽  
Reduce Fuel Consumption ◽  
Total Load ◽  
Open Path

Abstract. The paper examines the workload perceived by air traffic control officers (ATCOs) and pilots during continuous descent operations (CDOs), applying closed- and open-path procedures. CDOs reduce fuel consumption and noise emissions. Therefore, they are supported by airports as well as airlines. However, their use often depends on pilots asking for CDOs and controllers giving approval and directions. An adapted NASA Total Load Index (TLX) was used to measure the workload perception of ATCOs and pilots when applying CDOs at selected European airports. The main finding is that ATCOs’ workload increased when giving both closed- and open-path CDOs, which may have a negative impact on their willingness to apply CDOs. The main problem reported by pilots was insufficient distance-to-go information provided by ATCOs. The workload change is important when considering the use of CDOs.

How to Evaluate Remote Tower Metrics in Connection With Weather Observations

2018 ◽  
Vol 8 (2) ◽  
pp. 100-111 ◽  
Author(s):  
Maik Friedrich ◽  
Christoph Möhlenbrink
Keyword(s):  
Traffic Control ◽  
Air Traffic Control ◽  
Influential Factors ◽  
Air Traffic ◽  
Weather Event ◽  
Evaluation Of Performance ◽  
Weather Events ◽  
Weather Observations ◽  
Validation Experiment ◽  
Remote Controller

Abstract. Owing to the different approaches for remote tower operation, a standardized set of indicators is needed to evaluate the technical implementations at a task performance level. One of the most influential factors for air traffic control is weather. This article describes the influence of weather metrics on remote tower operations and how to validate them against each other. Weather metrics are essential to the evaluation of different remote controller working positions. Therefore, weather metrics were identified as part of a validation at the Erfurt-Weimar Airport. Air traffic control officers observed weather events at the tower control working position and the remote control working position. The eight participating air traffic control officers answered time-synchronized questionnaires at both workplaces. The questionnaires addressed operationally relevant weather events in the aerodrome. The validation experiment targeted the air traffic control officer’s ability to categorize and judge the same weather event at different workplaces. The results show the potential of standardized indicators for the evaluation of performance and the importance of weather metrics in relation to other evaluation metrics.

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