• Title, Summary, Keyword: 비행장

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The Concrete Classification and Registration for sUAS (현행 법률상 비사업용 소형무인비행장치 신고 및 식별표시의무 강화 규정 도입의 필요성)

  • Kim, Sung-Mi
    • The Korean Journal of Air & Space Law and Policy
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    • v.34 no.1
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    • pp.125-157
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    • 2019
  • Technological advancement and demand of sUAS (small Unmanned Aircraft System)are rapidly growing, which makes the current legal system unable to follow. Currently, Aviation Security Act and its subordinate law exclude the registration and certification for non-commercial purpose sUAS weighing less than 12kg. Despite this sUAS being the most popular model for consumer, there is no way to regulate them legally. When there is sUAS crash accident, the operator legally responsible for the occurrence damage cannot be identified. It has been an issue for a long time with the concrete classification and registration of sUAS, but it has not been introduced yet. It is obvious that damages caused by sUAS will be transferred not only to operators but also to third parties. Discussions on liability insurance for these sUAS are actively being held. But first, it is necessary to identify who will be responsible for the damage caused by the sUAS. In other words, even with the liability system established, without clarified operator the damage occurred cannot determine who is responsible. According to the cases of America and Germany, they have enforced the law of registration and identification obligated to 200g or 250g sUAS. Therefore, it is necessary to prepare regulations on concrete classification and registrations to identify for noncommercial purpose sUAS as soon as possible in Korea.

Fog Forecasting by Using Numerical Weather Prediction Model (수치모델을 이용한 안개 예측 사례 연구)

  • 김영아;오희진;서태건
    • Proceedings of The Korean Society of Agricultural and Forest Meteorology Conference
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    • pp.85-88
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    • 2002
  • 기상학적으로 안개는 지상에서 발생하는 응결 현상으로, 시정이 1km 이하일 때로 정의된다. 안개 발생은 기후 인자의 영향을 많이 받는다. 따라서 각 지역마다의 발생 특성을 따로 통계해야 할 필요가 있다. 특히 항공 교통의 장애가 되는 위험 요소로서의 역할이 중시되어 각 비행장마다 발생 특성이 따로 통계 분석되고 이용되어 왔다.(중략)

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Constitutive Modeling for Resilient Behavior of Granular Materials under Repeated Loading (반복하중을 받는 입상재료의 회복탄성거동에 관한 구성모델)

  • Rhee, Suk Keun
    • Journal of The Korean Society of Civil Engineers
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    • v.14 no.4
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    • pp.827-838
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    • 1994
  • Numerous pavement response models rely on constitutive relationships to describe the response of granular materials. In this study, a nonlinear elastic constitutive model which is a function of bulk stress and octahedral shear stress is proposed to describe the resilient behavior of thick granular base courses under flexible airfield pavements. Special features of this model are its accuracy to predict the nonlinear resilient behavior, its simplicity to determine the material constants and its ability to model the secondary effect of decreasing the resilient modulus due to shear effects. In laboratory tests, the nonlinear resilient behavior of granular materials is investigated and values of resilient moduli are determined to provide data for verifying the proposed model. It is found that the resilient modulus is much more dependent on the states of stresses in terms of bulk stress and deviator stress than any other factors. Result of comparison shows that predicted values of resilient moduli are in good agreement with the measured values indicating that the proposed model is suitable to describe the nonlinear resilient behavior of the granular material with wide range of stress states which meet in airfield pavements.

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Performance analysis for Ground Position Accuracy Test of MLAT (MLAT 지상 위치정확도 시험에 대한 성능 분석)

  • Koo, Bon-soo;Jang, Jae-won;Kim, Woo-riul;Kim, Tae-sik
    • The Journal of Advanced Navigation Technology
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    • v.21 no.4
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    • pp.325-331
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    • 2017
  • As a GPS stability problem arises, MLAT system is spotlighted as an alternative technology of ADS-B. MLAT system has a high position accuracy as much as ADS-B. Also, MLAT receives the mode A,C,S, and 1090ES(ADS-B) signals from the mounted aircraft transponder. MLAT receives signals from several receiver units and calculates aircraft positions. MLAT has ADS-B level positioning accurarcy using GPS and can calculate the position information with objects independently. According to global environment changes, Local area multiltilateration(LAM) surveillance system is under development for moving vehicles and aircraft detection in airport. These are still under testing in Tae-an Airfield. In the paper, we analyzed the performance by comparing the calculated position data from MLAT to RTK. In order to confirm the position accuracy of MLAT and the deviation of position data between fixed target and moving target on the ground during the field test in Tae-an Airfield.

Comparison of ILS and GBAS Through Flight Test in Taean Aerodrome and Kimpo Airport (태안 비행장과 김포공항 비행시험을 통한 ILS와 GBAS 비교)

  • Koo, Bon-Soo;Kim, Woo-Ri-Ul;Ju, Yo-Han;Hong, Gyo-Young
    • The Journal of Advanced Navigation Technology
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    • v.19 no.3
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    • pp.192-198
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    • 2015
  • Since instrument landing system currently operating in most airports is operating in single-pass, it is not possible to accommodate a large number of aircraft. A satellite navigation system GBAS using a GNSS has been developed to solve these limitation when air traffic increases. GBAS is better than the ILS in position accuracy and capable of landing through multiple paths rather than a single path, the aircraft can perform varied landing procedures. In this paper, after we established a virtual ILS procedures at Taean Airfield in which ILS installation is impossible due to environmental requirements and airspace restrictions, flight test was performed by Cessna Skyhawk 172 to compare the virtual ILS procedures and curved approach procedure and the advantage of curved approach was confirmed.

Consideration on Taean Airport Curved Approach Using the Simulator (시뮬레이터를 이용한 태안비행장 Curved Approach에 대한 고찰)

  • Koo, Bon-Soo;Jun, Hyang-Sig;Jung, Myeong-Sook;Park, Soo-Bog;Hong, Seung-Beom;Hong, Gyo-Young
    • The Journal of Advanced Navigation Technology
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    • v.18 no.4
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    • pp.288-295
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    • 2014
  • Current ILS is difficult for the many aircraft to access to the system at the same time because of it's system. And the equipments should be installed at the direction of every runway. Also, There is limitation that landing procedures must be have of only ILS single course when the aircraft land on the ground. hereupon, The more air traffic exist, the longer delay time of flight be. GBAS using the GNSS has been developed to overcome those limitations. Before flight test in Teean airport, this paper compares the taean approach procedure and curved approach procedure by using the simulator. Comparison study shows that curved approach procedure takes less flight time, low fuel consumpsion and make it possible to avoid noise airspace more than original procedure.

A Study on Development and Site selection of an AIRFIELD (경비행장 개발 및 입지선정에 관한 연구)

  • Park, Sang-Yong
    • The Korean Journal of Air & Space Law and Policy
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    • v.30 no.2
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    • pp.3-36
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    • 2015
  • As of end of 2014, the population engaging in aviation activities for leisure has reached approximately 13 million, where approximately 356 cases involve a general aircraft, 200 cases involve light aircraft, and 636 cases involve an ULM. The industry for leisure has become a very promising industry in line with rapidly rising living standards which are expected to further increase in the future. The demand for such services is expected to increase over time. The purpose of this paper is to review the development and site selection of airfields in anticipation of these developments in the industry. While the government also has experience in the review of airfield location and candidate sites, it is not the government that carries out the actual construction. As such, the feasibility of the site needs to be verified in terms of actual construction. This study identified factors for Site Selection of factors through a review of related documents and existing research reports. A questionnaire was also used to collect the views of experts in the field, which was then analyzed. The Research model was confirmed in the layered form for an AHP analysis. The factors for Site Selection were identified as the technical / operational factors and economic / political elements for a two-stage configuration. The third step consisted of technical and operational elements. The final step is was constructed a total of 11 elements (weather, surface conditions, obstacle limitation surface, airspace conditions, operating procedures, noise problems, environmental issues, availability of facilities, construction and investment costs, contribution to the local economy, accessibility, demand / the proximity of demand). The surveys are conducted for more than 10 General and light aircraft pilots, professionals, and instructor. The analysis results showed a higher level in the technical / operating elements (73.2%) in the first step, while the next step sawa higher level of the operational elements (30.9%) than the other. The factors for Site Selection were any particular elements did not appear high, the weather conditions (17.5%), noise problems (19.8%), the proximity of demand (6%), accessibility (5.7%), environmental issues (11.1%), availability of facilities (8%), airspace conditions (7.9%), obstacle limitation surface (12%), construction and investment costs (4.2%) and to operating procedures (4.9%), contribution to the local economy (3.8%).

A Study on Modelling the Airfield Capacity by using Simulation (시뮬레이션을 이용한 비행장능력 평가모형에 관한 연구)

  • 오승학;이상진
    • Journal of the military operations research society of Korea
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    • v.26 no.1
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    • pp.15-33
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    • 2000
  • This paper deals with an estimation method of the airfield capacity for the airlift operation. In the US Air Force, airfield capacities has been estimated using MOG(Maximum -On-the-Ground) concept, which is known to having several weaknesses. Recently, RAND suggests a personal-computer- based model called the Airfield Capacity Estimator(ACE), which is a more advanced and realistic technique compared to the MOG. This paper attempts to modify the ACE appropriate to the Korean airlift operation. While ACE is developed on the basis of strategic mobilization, Korean airlift operation is done on the tactical basis. A designed mdel is tested with simulation technique.

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The study on the safety of Sea Lane for LSA (경량항공기용 착수대 안전성 확보에 대한 연구)

  • Shin, Dai-Won
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.25 no.2
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    • pp.1-11
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    • 2017
  • In this study, we surveyed the regulations of the Seaplane base and Sea Lane for the Light Sport Aircraft(LSA), and analyzed the water landing/takeoff roll distance of LSA in Korea. Based on the information, we presented the situation of the Sea Lane and the Sea Lane Protection Zone concept, to ensure the Rectangle type Sea Lane and the Omni direction type Sea Lane. We analyzed the availability elements of the safety of Sea Lane for LSA in Korea. A Rectangle type Sea Lane 350 meters long and 40 meters wide, the diameter 350 meters for the An Omni direction type Sea Lane.

A Study on the Wartime Evaluation Model of Airfield by using Simulation (전시 비행장 항공작전능력 평가모형에 관한 연구)

  • 조관현;이상진
    • Journal of the military operations research society of Korea
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    • v.30 no.1
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    • pp.153-167
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    • 2004
  • This study focuses on building the wartime air operation model to evaluate the airfield capability. There are some uncertainties in the process of air operation such as mission flying time, turn around time, mission damage or kill rate, weather condition, and so on. Airplanes, on the way to the airbase after completing mission flight, may have been in queue on the holding point due to the unusable condition of airfield. And then, they may sometimes need to go other airbases due to the shortage of fuel. Under those uncertainties, this model is to evaluate the airfield capability in the wartime air operation using simulation.