The problems of airport landside capacity assessment are of industry-wide interest. Evaluation of landside capacity enables airport operators and airport designers to identify passenger and baggage flow bottlenecks, i...The problems of airport landside capacity assessment are of industry-wide interest. Evaluation of landside capacity enables airport operators and airport designers to identify passenger and baggage flow bottlenecks, identify the primary cause of bottlenecks formation and take measures mitigating the impact of bottlenecks on the airport terminal operation. Many studies dealing with the problems of airport landside capacity are focused mainly on the processing part of the airport terminal and consider the airport terminal to be an isolated system. Even the most of models of airport landside operations developed using various simulation （both generic and dedicated） software packages （e.g., PaxSim, SLAM, WITNESS, ARENA or EXTEND） are designed for simulating the passenger and baggage flows only between curb-side and apron. Although this approach provides valuable data concerning capacity, delays or processing bottlenecks, in some cases identified capacity constraints are only the symptoms of the actual problem. In order to discover the cause of the problem, it is necessary to consider the airport terminal as an integral part of much more complex regional, national or international transportation system. This article reflects the above mentioned requirements and introduces an innovative approach to passenger and baggage flow simulation based on the fact that airport terminal is considered as an integral part of air passenger door-to-door transportation process.展开更多
At airports, runway operation is the limiting factor for the overall throughput; specifically the fixed and overly conservative ICAO wake turbulence separation minima. The wake turbulence hazardous flows can dissipate...At airports, runway operation is the limiting factor for the overall throughput; specifically the fixed and overly conservative ICAO wake turbulence separation minima. The wake turbulence hazardous flows can dissipate quicker because of decay due to air turbulence or be transported out of the way on oncoming traffic by cross-wind, yet wake turbulence separation minima do not take into account wind conditions. Indeed, for safety reasons, most airports assume a worst-case scenario and use conservative separations; the interval between aircraft taking off or landing therefore often amounts to several minutes. However, with the aid of accurate wind data and precise measurements of wake vortex by radar sensors, more efficient intervals can be set, particularly when weather conditions are stable. Depending on traffic volume, these adjustments can generate capacity gains, which have major commercial benefits. This paper presents the use of Electronic scanning radar for detecting wake vortices. In this method, the raindrops Doppler spectrogram is used to retrieve the strength of the wake vortex. Numerical simulation are performed to establish an empirical model used during the retrieval method. This paper presents also the results obtained during the trials of the PARIS-CDG data set recorded from October 2014 to November 2015 with an X-band RADAR developed and deployed by THALES.展开更多
Most Level 3 airports around the world suffer severe congestion and flight delays.Airlines have to obtain airport slots in order to schedule flights at such airports.The main way for airlines to acquire slots is prima...Most Level 3 airports around the world suffer severe congestion and flight delays.Airlines have to obtain airport slots in order to schedule flights at such airports.The main way for airlines to acquire slots is primary slot allocation,in which a slot coordinator distributes slots to airlines according to certain rules and regulations.Due to excessive demand for slots and restrictions on allocation rules,it is difficult for some airlines to obtain the desired slots in this manner.Another way for airlines to obtain slots is through secondary slot trading,in which slots can be redistributed among airlines without being returned to slot pool.The secondary trading of airport slots has played a positive role in promoting the efficient utilization of slot resources,but systematic studies are insufficient.This paper discusses the reasons for the existence of slot secondary trading,sorts out the main policies and rules governing the mechanism,investigates its impacts on the industry and society,and points out the major problems and challenges.The paper provides a reference for subsequent research and practical application of airport slot secondary trading in the future.展开更多
文摘The problems of airport landside capacity assessment are of industry-wide interest. Evaluation of landside capacity enables airport operators and airport designers to identify passenger and baggage flow bottlenecks, identify the primary cause of bottlenecks formation and take measures mitigating the impact of bottlenecks on the airport terminal operation. Many studies dealing with the problems of airport landside capacity are focused mainly on the processing part of the airport terminal and consider the airport terminal to be an isolated system. Even the most of models of airport landside operations developed using various simulation （both generic and dedicated） software packages （e.g., PaxSim, SLAM, WITNESS, ARENA or EXTEND） are designed for simulating the passenger and baggage flows only between curb-side and apron. Although this approach provides valuable data concerning capacity, delays or processing bottlenecks, in some cases identified capacity constraints are only the symptoms of the actual problem. In order to discover the cause of the problem, it is necessary to consider the airport terminal as an integral part of much more complex regional, national or international transportation system. This article reflects the above mentioned requirements and introduces an innovative approach to passenger and baggage flow simulation based on the fact that airport terminal is considered as an integral part of air passenger door-to-door transportation process.
文摘At airports, runway operation is the limiting factor for the overall throughput; specifically the fixed and overly conservative ICAO wake turbulence separation minima. The wake turbulence hazardous flows can dissipate quicker because of decay due to air turbulence or be transported out of the way on oncoming traffic by cross-wind, yet wake turbulence separation minima do not take into account wind conditions. Indeed, for safety reasons, most airports assume a worst-case scenario and use conservative separations; the interval between aircraft taking off or landing therefore often amounts to several minutes. However, with the aid of accurate wind data and precise measurements of wake vortex by radar sensors, more efficient intervals can be set, particularly when weather conditions are stable. Depending on traffic volume, these adjustments can generate capacity gains, which have major commercial benefits. This paper presents the use of Electronic scanning radar for detecting wake vortices. In this method, the raindrops Doppler spectrogram is used to retrieve the strength of the wake vortex. Numerical simulation are performed to establish an empirical model used during the retrieval method. This paper presents also the results obtained during the trials of the PARIS-CDG data set recorded from October 2014 to November 2015 with an X-band RADAR developed and deployed by THALES.
基金supported by the National Natural Science Foundation of China(Nos.U2033203,52272333,U1833126,61773203)。
文摘Most Level 3 airports around the world suffer severe congestion and flight delays.Airlines have to obtain airport slots in order to schedule flights at such airports.The main way for airlines to acquire slots is primary slot allocation,in which a slot coordinator distributes slots to airlines according to certain rules and regulations.Due to excessive demand for slots and restrictions on allocation rules,it is difficult for some airlines to obtain the desired slots in this manner.Another way for airlines to obtain slots is through secondary slot trading,in which slots can be redistributed among airlines without being returned to slot pool.The secondary trading of airport slots has played a positive role in promoting the efficient utilization of slot resources,but systematic studies are insufficient.This paper discusses the reasons for the existence of slot secondary trading,sorts out the main policies and rules governing the mechanism,investigates its impacts on the industry and society,and points out the major problems and challenges.The paper provides a reference for subsequent research and practical application of airport slot secondary trading in the future.
