• Journal of the Korean Society for Aviation and Aeronautics
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• v.29 no.4
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• pp.37-44
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• 2021

In case of South Korea, the airspace which airlines can operate is extremely limited due to the military operational area located within the Incheon flight information region. As a result, safety problems such as mid-air collision between aircraft or Traffic alert and Collision Avoidance System Resolution Advisory (TCAS RA) may occur with higher probability than in wider airspace. In order to prevent such safety problems, an mid-air collision risk detection model based on Detect-And-Avoid (DAA) well clear metrics is investigated. The model calculates the risk of mid-air collision between aircraft using aircraft trajectory data. In this paper, the practical use of DAA well clear metrics based model has been validated. Aviation safety data such as aviation safety mandatory report and Automatic Dependent Surveillance Broadcast is used to measure the performance of the model. The attributes of individual aircraft track data is analyzed to correct the threshold of each parameter of the model.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.30 no.4
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• pp.132-144
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• 2022

In response to the recent surge in aviation demand, major airport and aviation authorities continue to make efforts to formulate arrival procedures that take into account efficient aircraft separation, noise and environmental issues related to carbon (CO₂) emissions. In order to ensure efficient traffic control and environmental issues, as a result, a new concept Trombone, Point Merge, etc. have been introduced and widely used. However, these new concept incisions are becoming a factor that hinders operational efficiency and stability due to the restricted domestic airspace such as military airspace and excessive constraints of altitude, speed, etc. which do not reflect the concept of continuous descent operation and eventually needs to be modified to make continuous descent operation as feasible as possible. We herewith analyze and propose the way of improving flight safety and efficiency in the arrival operation procedure by supplementary modification which consequently contribute to the aviation industry international competitiveness.

• Journal of Information Technology Applications and Management
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• v.30 no.6
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• pp.81-90
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• 2023

In aviation, with the rapid transformation of the mobility industry, UAMs are emerging to operate green low-altitude airspace in urban environments. In order for UAM aircraft to fly safely transporting passengers and cargo in low-altitude urban airspace, a traffic control system that supports the safe operation of the aircraft is essential. In particular, traffic control systems that reflect the characteristics of the flight environment, such as operating at low altitude in urban environments for a short period of time, are required. In this study, we define the definition of UATM and its main services that perform traffic control for the safe operation of UAMs. In addition, we analyzed the development trends of UATM systems based on domestic and overseas cases. Based on these analyses, we present the results of the concept design of the UATM system. After analyzing UATM development cases, we found that there is no commercialized UATM system, but overseas development is focused on systems that can integrate ATM and UTM. And we identified key stakeholders and interface data, and performed UATM system architecture and functional design based on the identified data. Finally, as a necessary element for the future development of UATM systems, we propose the establishment and advancement of UAM traffic flow management systems, the establishment of integrated control systems, and the development of interface with aircraft operation systems in preparation for the unmanned UAM aircraft.

• Journal of Korean Society of Transportation
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• v.23 no.6 s.84
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• pp.41-53
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• 2005

The effective utilization of an airport is considerably influenced by natural features and man-made structures inside and outside its boundary. These obstacles affect the airspace available for approaches and departures and the weather minima which dictates the necessary weather conditions for aircraft to be allowed to take-off or land. Certain areas of the airspace near airports must be regarded as the integral parts of the airport system. The availability of the required airspace is as important as are the runway and their associated strips to the safe and efficient use of the airport. For these reasons, ICAO and the member states have established the standards regarding the obstacle limitation surfaces and regulated the construction of the man-made structures in and beyond the surfaces. Existing objects that extend above a obstacle limitation surfaces should as for as practicable be removed except when, in the opinion of the appropriate authority, an objects is shielded an existing immovable objects, or after aeronautical study it is determined that the object would not adversely affect the safety or significantly affect the regularity of operations of airplanes. However, Korea's aviation law does not specified the outer horizontal surface in the obstacle limitation surfaces, while ICAO and most member states do. The absence of the outer horizontal surface regulation has created legal disputes between regulating agencies and private parties. The case study in this paper found that a skyscraper planned beyond Korea's obstacle limitation surfaces does affect the flight safety and the efficient use of an airport. Therefore, in areas beyond the obstacle limitation surfaces. those objects which extend to a height of 150m or more above ground elevation should be regarded as obstacle, unless a special aeronautical study indicates that they do not constitute a hazard to airplanes. We proposed low alternative regulatory schemes for resolving the issues raised in this paper, and we recommended to adopt ICAO's standards and recommended practices.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.8 no.1
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• pp.111-124
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• 2000

In this study, pilot's read-back errors were reviewed in terms of its cause and consequence while FAA tried to weigh a new initiative in the atc-pilot communication dispute in opposition of a majority of the aviation community by addressing an interpretive rule of 14CFR 91. Especially human factors in ATC communications were outlined with a view to suggest a line of recommendations for a successful accomplishment of safe flight in the busy terminal airspace.

• 한국항공운항학회:학술대회논문집
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• 2015.11a
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• pp.42-46
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• 2015

This paper is written about the UAS DAA(Detect and Avoidance) of EU MIDCAS project. This project has been performed from 2009 to 2014. The main mission of this project was supporting the certification agency which is ICAO, EASA, and so on. The result of this project would be the base of the UAS operation regulation in the non segregated airspace. UAS usage demand is expanding rapidly, so we also start the development of the regulation, the research of SAA technologies and LRU.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.07a
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• pp.301-302
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• 2018

본 논문에서는 대한민국 공항 관제권 구역과 비행금지구역을 표시하는 API를 이용하여 드론비행금지구역을 나타내는 서비스를 구현한 결과를 보인다. GIS(Geographic Information System) 응용 프로그램인 QGIS에 WMS(Web Map Service)를 이용하여 오픈 API를 연동하였다. 항공정보도 API로부터 얻은 관제권 및 비행금지구역, 비행제한구역 레이어 등을 결합하여 드론 비행금지구역에 대한 데이터를 가진 새로운 레이어를 생성하였다.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.6 no.1
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• pp.111-124
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• 1998

In order to research the propriety of selection of 4 potential airport sites after a field investigation is made in JEONJU area, this paper analyzes those sites comparatively considering major factors required by FAA. There are at least 10 factors that should be considered when analyzing potential airport sites : convenience to users, availability of land and land costs, design and layout of the airport, airspace obstructions, engineering factors, social and environmental factors, availability of utilites, atmospheric conditions, hazards, coordination with other airports.

• Journal of East-Asian Urban History
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• v.3 no.1
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• pp.139-160
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• 2021

The verandah was a common feature of Chinese multi-storeyed houses in Southeast Asia and China. This paper argues that while an earlier version of a narrow walkway might have had its origin in Singapore, the building of an extension on the upper floors encroaching the airspace over the road skirting the building was an arrangement allowed by the colonial Hong Kong government in compensation to landlords for space devoted to ventilation. As the introduction of reinforced concrete allowed buildings to become taller, the more attractive it was to developers to incorporate the verandah design.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.07a
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• pp.321-322
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• 2020

본 논문에서는 대한민국에서 드론을 포함한 UAV를 합법적으로 비행할 수 있도록 관련 구역 정보를 제공하는 서비스를 구현한다. Mapbox API를 이용하여 3D지도를 설정하고 드론 관련 구역 정보를 레이어화 한다. 레이어는 GL JS를 이용하여 인터페이스를 구성해 지도상에 나타낸다. GL JS로 검색, 네비게이션 기능의 인터페이스를 구성한다. 작성한 결과물을 서버에 업로드하여 서비스를 구현하였다.