• Journal of the Korean Society for Aviation and Aeronautics
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• v.20 no.2
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• pp.26-31
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• 2012

A new operational concept for the CNS/ATM using the digital data communication technology and satellite navigation system is being implemented globally and the United States is the first country to apply UAT ADS-B system for general aviation. Korea also has plan to build ADS-B system for aeronautical surveillance to monitor low altitude flight of light aircraft and ultra-light flying device and the research to develop UAT ADS-B equipment is being carried out. This paper presents the application method of UAT ADS-B to support test operation with case study of foreign UAT ADS-B operation and survey of domestic environment.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.658-661
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• 2014

RTCA DO-278A는 통신, 항법, 감시 및 항공 교통 관리(CNS/ATM) 시스템과 장비에 대한 비항공용(지상 및 우주) 소프트웨어의 무결성을 보장하기 위한 개발 지침을 제공한다. 안전하고 효율적인 공항운영을 위한 차세대 지상이동 관제시스템인 A-SMGCS는 DO-278A의 무결성 보장 고려사항을 준수하여 개발되어야 한다. 본 논문에서는 소프트웨어 개발 수명 주기 전체에 걸쳐 DO-278A의 소프트웨어 무결성 보장 고려사항을 반영한 A-SMGCS 개발 방법을 제안한다.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.42 no.5
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• pp.368-375
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• 2014

The Ground Based Augmentation System (GBAS) is influenced by environmental factors, making analysis in the installation region important. This study has proposed the sigma inflation of the B-value considering the satellite elevation angle and analyzed the Vertical Protection Level (VPL) of the H1 hypothesis. After collecting data that meet the environmental conditions of the installation region, sigma expansion coefficients by the unit of satellite elevation angle ($5^{\circ}$) have been estimated. The obtained results were functionalized through curve-fitting, and sigma inflation customized for the environmental conditions of the test region was proposed. Then, the characteristics were classified and analyzed depending on humidity and solar activities. According to the sigma inflation with respect to elevation angle analysis, changes in the size of sigma inflation factors by the difference of humidity were minor. However, the VPL under the satellite elevation angle-based sigma inflation met integrity. Also, considering the sigma inflation factor with respect to elevation angle, compared to existing methods, high-integrity and improved availability is confirmed by removing unnecessary margins in high elevation angle satellite.

• Journal of Institute of Control, Robotics and Systems
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• v.19 no.5
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• pp.442-449
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• 2013

In this paper, a simulation system based on X-Plane and MATLAB/Simulink for multiple UAVs is presented. For the conceptual design of this proposed system, a hierarchical system architecture for multiple UAVs is presented. This architecture has object-oriented data structure which consists of three objects (UAV status, mission and task, and environment) and a hierarchy consisting of four layers (decision making layer, task assignment layer, path and motion planning layer, and collision avoidance layer) is also proposed. In addition, this paper shows a implementation of simulation system based on the proposed system architecture using X-Plane and MATLAB/Simulink. The result of simulation from the developed system in this paper validate capability of application for multiple UAVs in real environment.

• 한국디지털정책학회:학술대회논문집
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• 2006.12a
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• pp.337-354
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• 2006

본 연구는 금융거래를 위한 매체 특성과 금융 업무처리를 위한 개인의 매체 선택에 미치는 영향 요인을 규명하고자 하였다. 또한 매체간 특성을 고려하여 차이점에 대하여 실증적 검증을 시도하였다. 아울러 금융 채널의 사용에 영향을 미치는 매체의 특성들이 반영된 상황 발생시 상황에 얼마나 부합되는 금융 채널을 선택하는지에 대해서도 실증 분석하였다. 정보 기술의 발전으로 금융거래를 위한 채널이 다양화 되었으며, 최근 인터넷 뱅킹에 이어 모바일 뱅킹이 도입되면서 금융 채널의 다양화와 급속화가 진행되고 있다. 이는 차별적 채널의 도입과 운용의 필요성을 제시하며, 고객의 특성 및 거래액, 고객이 느끼는 각 채널별 특성을 고려하여 고객 만족 전략을 전개할 수 있음을 시사한다. 연구결과, 오프라인 거래채널인 은행 창구와 ATM은 입지에 민감한 금융 매체임에 따라 편리성이 사용량에 영향을 미치는 요인으로 나타났으며, 온라인 매체라 할 수 있는 폰뱅킹 , 인터넷 뱅킹 , 모바일 뱅킹은 입지나 위치와는 상관없는 기술적 안전성이 보장되어야 하는 신뢰성이 사용량에 영향을 미치는 요인으로 나타났다. 본 연구에서는 금융 매체별 사용량에 영향을 미치는 특성을 파악함으로써 금융 기관의 차별적 고객 채널의 도입과 운용의 필요성을 제시하고 있다.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.15 no.2
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• pp.25-31
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• 2007

The ADS-B test is a program that is examining the use of ADS-B, especially CDTI for aircraft surveillance in Korea. The ADS-B project is to provide operational benefits to Air Traffic Controllers in the selected area and provide first operational experience of ADS-B in ATCS environment of South Korea. For these objectives, the ground station has installed in Tae-An airport, Participation in the Ground Test has been limited to 4 Aircraft of Hanseo University which are installed ADS-B equipment. Ground test is a test that is examining on the movement area of Tae-An Airport on the assumption that the visibility is below weather minia of the airport. This test have been experimented as pre-arranged scenarios. In view of the results achieved, it has shown that the volume of voice communication between controller and pilot are remarkably reduced. Additionally, as both pilots and air traffic controllers are able to see the positions of traffic in the vicinity of the aircraft, the test has demonstrated that it is possible for ADS-B not only to decline the controller's workload, but also to enhance pilot situational awareness in the near future.

• Journal of Advanced Navigation Technology
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• v.12 no.6
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• pp.554-558
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• 2008

In this paper, we show that the SIDMA(Self-organized Time Division Multiple Access) protocol using aviation surveillance data link now, designs to the ICAO DO 9816 documentation sequence. This protocol makes use of the VDL(VHF Data Link) Mode 4 and UAT(Universal Access Transceiver) system's MAC(Media Access Control) layer. We make sure of the simulation result and implementation of STDMA protocol program in accompany with the ICAO documentation sequence. This program operates the slot allocation and reservation with report rate when protocol transmits data and calculates slot address.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.21 no.1
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• pp.74-79
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• 2013

Early remotely-piloted aircraft system (RPAS) development focused on simple reconnaissance to obtain information by visual observation for military demands. Currently, various types of remotely-piloted aircraft (RPA) is being developed worldwide for applications in many different areas. As RPA avionics are combined with CNS/ATM technologies, RPA capabilities will be enhanced and the market is expected to grow rapidly. ICAO has been held the Air Navigation Commission on 14 October 2011 to discuss revising Procedures for air navigation services (PANS) and guidance material related to RPA and their associated systems. It progressed that Annex 2 and 7 will be revised and came into effect from 2012. However most of incorporate revisions are not clear yet. Because the revision articles recommend follow requirements of the state(s). Considering operations of RPA in controlled airspace and between adjacent states, the qualification and training of RPA pilot will be one of the main issues for RPA operation. In this paper, we will take a look at international and domestic trends of regulation framework in ICAO and RPA advanced country in chapter 2.1 and suggest about consideration of remote pilot qualification and training for establishing regulations of remote pilot license.

• Journal of Advanced Navigation Technology
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• v.19 no.6
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• pp.515-523
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• 2015

The air traffic control service in the domestic airports and approach control centers is provided using data from flight plan and a variety of surveillance sensors such as SSR, ADS-B and MLAT, etc. The physical connection methods and data types of the sensors are various, as so using these data directly may cause a lot of cost in development and maintenance of air traffic control equipment. As a method for solving such a problem, we propose a system that can convert the data from the heterogeneous sensors to the unified format which can be processed by the air traffic control devices. In this paper, the analysis results for the physical characteristics and data formats of the typical surveillance sensors are described. Also, the system design and the system implementation result for the multi-sensor interface system to interoperate the sensors are explained in detail.

• Journal of Advanced Navigation Technology
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• v.20 no.4
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• pp.336-343
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• 2016

Future air navigation system (FANS) Committee overcomes the limitations of traditional systems, the development of worldwide new system that allows the development of air traffic management have been determined to be necessary. In order to accommodate the rapid increase in aircraft traffic and maximize the safe air navigation efficiency, ICAO is recommending a new performance-based communications and surveillance (PBCS) system. However, although utilizing wireless data link in the case of korea currently, the introduction of the PBCS is not performed normally. In this paper, we review the concept of PBCS, and aviation developed countries look to the applied case of PBCS. It also analyzes trends and status and problems of Korea and introduce future policy directions for CNS/ATM system improvement.