• Journal of Korean Society of Transportation
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• v.23 no.3 s.81
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• pp.21-34
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• 2005

To control the obstacles surrounding aerodrome is significant for preventing air accident and ensuring the long sustaining of aerodromes. On the other hand, within a scope of ensuring safe flight operations, the application of Shielding is one of the issues to be importantly considered to manage efficiently the obstacles limitation around aerodromes, to dissolute the private asset privilege limitation from regulation on aerodrome circumference, and to decrease the pains to manage the obstacles, in terms of not only operating safely but also utilizing efficiently the airspace around aerodromes. The ICAO and other aviation-advanced states mitigate the construction limitation or exempt the obligation of obstacle sign by applying the shielding theory that the obstacles are not regarded as obstacles where are below the shadow surface. The Republic of Korea inserted the new regulation including the applying shielding similar to ICAO on Aviation Act and regulations. It is, however, hard to manage the aviation obstacles around aerodrome efficiently with these new regulation. Particularly, there exists much rooms to dispute because it cannot suggest the specific standard which is necessary to apply shielding theory at airspace of aerodromes. Therefore, in this study, the international standards on aviation obstacles were reviewed, analyzed and compared with those of domestic status. The direction of which guideline for control of aeronautical obstacles applicable within domestic circumstances as well as correspondent with international standard was suggested. Particularly, as far as the disputable application of shielding theory is concerned, the alternatives for aviation safety and efficient airspace operation by suggesting the clear standards alternatives were suggested.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.25 no.3
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• pp.44-50
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• 2017

This paper proposes arrival scheduling and advisory generation algorithms which can be used in the terminal airspace with Point-Merge procedures. The proposed scheduling algorithm consists of two steps. In the first step, the algorithm computes aircraft schedules at the entrance of the Point-Merge sequencing legs based on First-Come First-Served(FCFS) strategy. Then, in the second step, optimal sequence and schedules of all aircraft at the runway are computed using Multi-Objective Dynamic Programming(MODP) method. Finally, the advisories that have to be provided to the air traffic controllers are generated. To demonstrate the proposed algorithms, the simulation was conducted based on Jeju International Airport environments.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.26 no.2
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• pp.39-46
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• 2018

Departure Manager (DMAN) is a tool to optimize the departure sequence and to suggest appropriate take-off time and off-block time of each departure aircraft to the air traffic controllers. To that end, Variable Taxi Time (VTT), which is time duration of the aircraft from the stand to the runway, should be estimated. In this paper, a study for development of VTT prediction algorithm based on machine learning techniques is presented. The factors affecting aircraft taxi speeds were identified through the analysis of historical traffic data on the airport surface. The prediction model suggested in this study consists of several sub-models that reflect different types of surface maneuvers based on the analysis result. The prediction performance of the proposed method was evaluated using the actual operational data.

• Proceedings of the KSR Conference
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• 2001.10a
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• pp.115-134
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• 2001

현재 정부는 지금까지 관청 조직인 철도청에 의해 철도시설의 건설 및 유지관리 업무와 열차 수송 업무 등 운영부문을 일괄적으로 수행되어 오던 우리나라의 철도교통체계를 근본적으로 변화시키는 작업을 추진하고 있다. '철도구조개혁'이라 지칭되는 이러한 작업은 소위 말하는 상하분리 또는 수직적 분리의 원칙에 따라 철도청의 업무를 하부구조에 해당하는 기반시설(infrastructure) 부문과 철도차량을 운행하여 여객과 화물을 운송하는 운영부문으로 구분하여, 기반시설에 해당하는 부문은 기본적으로 사회간접자본의 개념에서 국가의 책임으로 하고 운영부문에 해당하는 부문은 타 교통수단의 운영주체 위상(예: 고속버스 회사, 항공회사 등)과 같은 민간 경영체제로 전환한 다는 것이 주 내용이다.(중략)

• 한국항공운항학회:학술대회논문집
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• 2016.05a
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• pp.245-248
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• 2016

현대의 항공테러는 단순한 항공기 납치뿐만 아니라 항공기의 공중 폭파, 항공기에 대한 미사일 공격, 공항과 승객에 대한 공격, 그리고 항공 외부 시설에 대한 공격 등 실로 다양한 형태로 자행되고 있다. 항공 교통에서의 불법 방해행위를 사전에 방지하기 위해서는 출발지의 보안 검색이 무엇보다도 중요하며, 이를 위해서 사전 예방적 선제적 항공보안관리 체계 전환, 출입부터 탑승까지 전 과정을 프로세스화한 점검활동 강화, 국제권고기준 항공보안장비 보유와 첨단화 등 미래 변화에 대한 능동적 대처뿐만 아니라 정확한 보안검색과 고객편의의 융합을 통해 세계 최고 공항으로 지향하며, 행동탐지기법의 도입을 통해 일상적이고 포괄적인 보안검색 운영의 약점을 보완하여 항공보안 강화의 토대를 마련해야 하고, 불법 방해행위의 억지를 위해 2015년부터 새롭게 실시하는 국제민간항공기구 상시 모니터링 제도의 항공보안 평가(USAP-CMA) 방식을 적극 검토하여 국정원 공항공사 항공사 등 관련기관 정보 공유, 지속적인 모니터링 및 국내 국제민간항공기구(ICAO) 인증 항공 보안평가관 등과 철저히 대비한 세부 대응 계획을 수립하고 항공보안 전문가 육성을 강구하여야 한다.

• Journal of Advanced Navigation Technology
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• v.26 no.6
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• pp.434-440
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• 2022

The ICAO (International civil aviation organization)recommended the implementation of the GANP (global air navigation plan) for strategic decision-making and air traffic management evaluation. In this study, we proposed a new method for finding the route distance from KPI (key performance indicator) 05 actual route extension presented for air traffic management evaluation. For this purpose, we collected trajectory data for one month and calculated the en-route distances using the methods presented in ICAO and the methods presented by this author. In the ICAO method, the intersection point must be estimated through the equation of a circle for radius 40 NM and the equation of a straight line for an inner and outer point close to a circle in the track data, and four flight distances are calculated to calculate the en-route distance. In the method presented in this study, two flight distances are calculated without estimating the intersection point to calculate the en-route distance. To determine the error between the two methods, we used the performance evaluation index RMSE (root mean square error) and the determination factor R² of the regression model.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.19 no.4
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• pp.111-116
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• 2011

Incheon International Airport is becoming a hub in the Northeast Asia region since its opening in 2001. Along with an increasing volume of air traffic, demands for airspace are also increasing significantly. In particular, air traffic delays have been growing rapidly due to an increasing volume of air traffic, specially flying to Europe through China. And therefore, there should be an alternative protocol to prevent flight delays. The main purpose of this study is to review current West Sea Airways of G597/Y64 which contains highly potential problems and to evaluate the efficacy of double-tracked airways in the west sea area.

• 한국항공운항학회:학술대회논문집
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• 2015.11a
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• pp.68-77
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• 2015

점증하는 항공교통량의 원활한 수용과 안전한 항공기술 저변확대를 위하여 ICAO는 성능기반의 항공교통관리(ATM) 체계와 시스템을 Upgrade할 구체적 이행계획인 ASBU를 개정하고 체약국들의 수용을 촉구하고 있고, 우리나라는 ICAO의 5연임 이사국으로서 ASBU의 주요 Module에 대응하는 모든 Working Paper에 대하여 적극 수용한다는 입장이다. 본 논문은 ASBU의 PIA 4에 해당하는 CDO 및 관련 Module인 TBO의 개념을 살펴보고, 선도적으로 운용되고 있는 사례를 분석해 봄으로써 미래에 대응하는 방안을 찾고자 하였다. CDO는 새로운 장비와 시스템을 갖추지 않더라도 절차의 보완으로 개선할 수 있는 부문에 속하므로 우리나라의 운영 현황을 리뷰하고 그 영향에 대하여 정리해 보았다. 다만, 항공기 고도 강하 단계에서의 개선효과가 상승 또는 순항 단계에 비하여 효율성이 상대적으로 미미한 편이고, ATM 구분 상 기상 등의 외부 변수에 취약하여 효율성 연구에 접근하기 어려운 면이 있으나, 고밀도 공항의 특화된 CDO 기법 개발을 통하여 연료절감 및 탄소배출량 저감, 소음감소의 성과를 이룬 선진 사례를 들어 국내에 적용할 수 있는 방안에 대하여 장기적으로 연구하고자 한다.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.26 no.4
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• pp.101-109
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• 2018

In order to predict the future needs of the aircraft repair parts, each military group develops and applies various techniques to their characteristics. However, the aircraft and the equipped weapon systems are becoming increasingly advanced, and there is a problem in improving the hit rate by applying the existing demand prediction technique due to the change of the aircraft condition according to the long term operation of the aircraft. In this study, we propose a new prediction model based on the conventional time-series analysis technique to improve the prediction accuracy of aircraft repair parts by using machine learning model. And we show the most effective predictive method by demonstrating the change of hit rate based on actual data.

• Journal of Korean Society of Transportation
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• v.27 no.3
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• pp.103-109
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• 2009

Aircraft fuel cost is the largest airline expenses in airlines who play a major role in air transportation system. Airlines have been making a great effort to save fuel as much as they can. Among these efforts, the systematic fueling strategy has been taken a growing attention since it is recognized as a very cost-effective fuel management strategy. The systematic fueling strategy is the fuel saving strategy in which extra amount of fuel is loaded to utilize the fueling cost differentiation among the cities where the aircraft operate. In this paper, the aircraft fueling optimization model is proposed. The proposed model is to calculate precise amount of loaded fuel to minimize overall fuel cost assuming that the aircraft routing for all aircrafts and fueling cost in all airports where the aircraft fly are given. Compared with heuristic fueling strategy, the result of the proposed model is promising. Therefore, it is expected that the proposed model plays a major role in fuel management strategy in airline operation.