• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2010.06a
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• pp.247-250
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• 2010

해상에서 실시간 USN 기반의 각종 해양안전 관련 시스템이 구축되고 있고, 해상에서의 기상에 의한 안전사고는 해마다 지속적으로 발생하고 있지만 해상에서의 선박안전에 필요한 기상정보시스템은 매우 부족한 실정이며 기상청 예보에만 의존하고 있다. 해상 및 연안에서 선박 안전관리를 위해서는 보다 세밀한 기상정보시스템 구축이 필요하며 관련 담당자 및 선박운항 당사자가 사전에 미리 판단할 수 있는 객관적인 정보제공이 필요하며, 이를 위한 해양기상예보시스템 개발을 수행하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.06a
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• pp.39-41
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• 2022

해양정보의 디지털화, e-Navigation 개념의 해양서비스 개발, 차세대 전자해도 도입, 자율운항선박 기술 개발 등 해양 분야의 주요 이슈에 대응하여 핵심 항해안전지원 시설인 항로표지 역할 변화가 요구되고 있다. 특히 국제항로표협회(IALA)의 해양자원명(MRN) 지침과 항로표지 정보교환 표준(S-201) 개발을 통해 항로표지 정보의 디지털화와 정보 서비스화를 강조하고 있으며, e-Navigation 개념의 해양 서비스 개발을 논의 중이다. 본 연구에서는 현행 항로표지 정보시스템 현황을 분석하고, 국가 연구개발 사업으로 추진 중인 스마트 항로표지 및 정보협력 시스템의 구조를 분석하였다. 또한 항로표지 기본 및 수집정보를 이용한 항로표지 정보 서비스 종류를 식별하고 서비스 운영개념을 제안하였다. 본 연구에서 제안하는 항로표지 정보 서비스 운영개념에 따라 항로표지 정보 서비스 센터 구축 및 국제 정보표준 개발 활동이 추진되어야 할 것으로 사료 된다.

• Journal of Satellite, Information and Communications
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• v.1 no.2
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• pp.16-24
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• 2006

As a multi-mission GEO satellite, COMS system is being developed jointly by KARI, ETRI, KORDI, KMA, and industries from both abroad and domestic. EADS ASRTIUM is the prime contractor for manufacturing the COMS. ETRI is developing the COMS Ka-band payload and SGCS with the fund from MIC. COMS Satellite Ground Control System (SGCS) will be the only system for monitor and control of the satellite in orbit. In order to fulfill the mission operations of the three payloads and spacecraft bus, COMS SGCS performs telemetry reception and processing, satellite tracking and ranging, command generation and transmission, satellite mission planning, flight dynamics operations, and satellite simulation, By the proper functional allocations, COMS SGCS is divided into five subsystems such as TTC, ROS, MPS, FDS, and CSS. In this paper, functional design of the COMS SGCS is described as five subsystems and the interfaces among the subsystems.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.7
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• pp.1305-1310
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• 2007

ePosition is a technology that can provide the spacial position of the earth to the information of ePosition ID through the Internet. It is serving the information of land location based on the Internet using the ePosition technology now, but it needs the service technique which can supply the marine data and the information of maritime position. Moreover, to support the information service of marine position, it needs the ENC linked technique based on S-57 that is an IHO transfer standard for digital hydrographic data. In this paper, therefore, it develops a linkage method for applying and utilizing the ePosition technology to ENC data, and supplements the base technology for applying it to marine related fields. As study method, firstly, this paper analyses ENC data model and structure, and converses for processing ENC file to ePosition data. Lastly, it derives the interconnection method with ePosition database and shows the ePosition service application based on the linked data and its validity.

• Journal of Advanced Marine Engineering and Technology
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• v.39 no.3
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• pp.261-267
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• 2015

A support system which allows operator to check the condition of a vessel and to warn the sea risk in order to prevent accidents of leisure boats, is required. Therefore, this paper proposes a navigational safety support system to ensure the safety of vessels by monitoring and managing the status of those ships. In developing a system process, each developed equipment is integrated and verified whether the functional, compositional and operational algorithms are working properly according to the designed object.

• Journal of the Korean Society for Marine Environment & Energy
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• v.4 no.2
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• pp.61-67
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• 2001

Development of a barrier system for floating debris at river is introduced. The system is to prevent pollution of coastal water caused by marine debris which originates from land. The system consists of harrier boom, mooring system and boom winder. The harrier boom, which is self-inflatable with circular band spring, guides floating debris to a collecting conveyer system. Design parameters of the harrier system were reviewed and its design criteria were established. Based on the established design criteria, a pilot harrier system was built and tested at Tanchon branch of the Han river. It is proved that the suggested system is very efficient to collect floating debris at river.

• 한국지형공간정보학회:학술대회논문집
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• 2002.03a
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• pp.79-89
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• 2002

해양기본지리정보란 해양의 여러 정보 중 기초적인 주요지리정보로서 연안 및 해양의 지형 및 경계등의 위치 및 속성에 관한 정보를 말하며, 이러한 정보는 국가기본지리정보 체계와 다양한 해양정보시스템의 기본데이터 항목으로 사용된다. 해양기본지리정보구축을 위해서는 먼저 해양기본지리정보의 항목이 선정되어야 할 것이다. 또한 해양의 측량, 관측분야에서도 급격한 기술의 발달에 따라 선정된 항목의 기존 획득자료의 활용성 여부에 대한 분석이 필요하다. 이러한 자료검증과정을 통해 기본 지리정보 자료획득에 대한 계획을 수립할 수 있을 것이며, 수립된 계획을 바탕으로 정확도 높은 자료의 획득을 위해 노력해야 한다. 다양한 방법에 의해 획득 및 구축되어진 해양기본지리정보는 해양수산관련 정보화시스템과 인터넷 등을 통해 여러 분야에서 활용 및 제공되어질 것이다. 해양기본지리정보와 나아가 해양지리정보체계의 보다 나은 구축을 위해 기존의 해양관련지리정보 및 외국사례의 분석을 통해 현재 추진중인 해양기본지리정보 구축의 방향 및 구축자료의 활용방안에 대해 간략히 언급해 보았다. 해양을 보존 관리하기 위해서는 다양한 정보를 유기적으로 구축, 관리 및 공급할 수 있는 지리정보시스템(Geographic Information System, GIS)의 중요성은 앞으로도 계속 커질 것이다.

• Korean Journal of Remote Sensing
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• v.23 no.2
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• pp.137-144
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• 2007

In KORDI (Korea Ocean Research and Development Institute), the KOSC (Korea Ocean Satellite Center) construction project is being prepared for acquisition, processing and distribution of sensor data via L-band from GOCI (Geostationary Ocean Color Imager) instrument which is loaded on COMS (Communication, Ocean and Meteorological Satellite); it will be launched in 2008. Ansan (the headquarter of KORDI) has been selected for the location of KOSC between 5 proposed sites, because it has the best condition to receive radio wave. The data acquisition system is classified into antenna and RF. Antenna is designed to be $\phi$ 9m cassegrain antenna which has 19.35 G/T$(dB/^{\circ}K)$ at 1.67GHz. RF module is divided into LNA (low noise amplifier) and down converter, those are designed to send only horizontal polarization to modem. The existing building is re-designed and arranged for the KOSC operation concept; computing room, board of electricity, data processing room, operation room. Hardware and network facilities have been designed to adapt for efficiency of each functions. The distribution system which is one of the most important systems will be constructed mainly on the internet. and it is also being considered constructing outer data distribution system as a web hosting service for offering received data to user less than an hour.

• Journal of Ocean Engineering and Technology
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• v.33 no.4
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• pp.350-357
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• 2019

The development of marine technology is expected to increase the demand for marine plants because of increasing oil prices. Therefore, there is also expected to be an increase in the demand for cylindrical structures such as URF (umbilical, riser, flowline) structures and spars, which are used operating in various seas. However, a cylindrical structure experiences vortex induced motion (VIM) in a current. In particular, for risers and umbilicals, it is important to identify the characteristics of the VIM because interference between structures can occur. In addition, various studies have been conducted to reduce VIM because it is the cause of fatigue damage to structures. The helical strake, which was developed for VIM reduction, has an excellent VIM reduction performance, but is difficult to install on structures and has a negative effect on heave motion. Therefore, the purpose of this study was to supplement the shortcomings of the helical strake and develop a high-performance reduction device. In the reduction device developed in this study, a string is placed around the structure inside the flow, causing vibration. The vibration of this string causes a small turbulence in the flow field, reducing the VIM effect on the structure. Finally, in this study, the 2-DOF motion characteristics of models without a suppression device, models with a helical strake, and models with a string were investigated, and their reduction performances were compared through model tests.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2005.11a
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• pp.426-430
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• 2005

The COMS(Communication, Ocean and Meteorological Satellite) is the first developed three-axis stabilization multi-function satellite on geostationary earth orbit(GEO) in korea, presently scheduled to be launched in 2008. The COMS propulsion system provides the thrust and torque required for the insertion into GEO, attitude and orbit control/adjustment of spacecraft. In this paper, system design of propulsion system, basic functions and design requirement of components are described.