• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.3
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• pp.444-451
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• 2007

The design parameters of transmitter and receiver channel systems for COMS, which provides meteorological and ocean data services, were analyzed and the channel design parameters for a proper design of a small user-terminal were proposed in this paper. The COMS transmits the oceanic observation data by using the S/L-band link to the earth station. The meteorological data also are transmitted to the earth station, the meteorological data services, which are processed in the earth station, are provided to user. The sensor data are transmitted as digital signal type and are received by bilateral small-sized user terminals. So the optimal channel system for transmission and reception of sensor data should be designed on the basis of the channel modeling and analyzed results for primary technologies.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2014.10a
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• pp.341-343
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• 2014

3D 지리정보 통합 플렛폼을 활용하여 해양교통시설 정보 및 이를 운영하기 위한 다양한 부가정보(기상, 낙뢰, 지진, AIS 등)를 매쉬업하여 표출함으로서 해양교통시설을 효과적으로 운영관리하고 이를 활용하여 서비스 이용자 접근성을 보다 표리하게 제공할 수 있는 방안을 제시하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2019.11a
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• pp.104-106
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• 2019

IMO, IALA는 e-Navigation 전략과 해사 서비스를 개발하고, 해상자원에 대한 유일 번호체계 도입을 위한 해상자원명 지침을 개발하고 있으며, 항로표지 등의 해양정보를 해사안전 국제 공통 표준(S-100)에 기반한 정보 표준 및 관련 서비스 표준을 개발 중에 있다. 해상교통시설을 기반으로 항로표지, 해양기상 정보 등 다양한 정보를 수집/관리 하고 있으므로, 항로표지 관련정보를 효율적으로 관리하고 육상 및 해상 사용자로의 활용 증대를 위해 항로표지 정보의 스마트화 전략이 요구 된다. 본 연구에서는 항로표지 스마트화 전략의 핵심 요소인 항로표지 정보 표준에 기반한 체계 구축, 유일번호 부여 및 활용을 위한 해상자원명 적용 방안을 소개하고, 이러한 핵심 기술을 활용한 항로표지 정보의 스마트화 전략을 제시 하고자 한다.

• Journal of Navigation and Port Research
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• v.46 no.3
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• pp.158-167
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• 2022

The International Maritime Organization's e-Navigation strategy introduces new technologies to ships to support easier and safer navigation. To implement the e-Navigation strategy, it was necessary to develop a common data model, that could meet various requirements across all aspects of the maritime information service. The International Hydrographic Organization's S-100 Universal Hydrographic Data Model was selected, as the basis for the standardization of maritime data products. Three S-100 based product specifications for weather information, collectively called "S-41X", are currently under development by the NOAA's Ocean Prediction Center, for use in the Electronic Chart Display and Information System (ECDIS). This paper describes a design of a grid based S-413 data model out of three S-41X product specifications. Other S-100 data products, which support the gridded data format, were considered. To verify the data model, an encoding test was conducted, using the Korean Meteorological Adminstration's numerical prediction model results.

• Journal of Satellite, Information and Communications
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• v.5 no.2
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• pp.75-81
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• 2010

COMS (Communication, Ocean and Meteorological Satellite) is the multi-purposed Korean geostationary satellite funded by four Korean government ministries, and is to supply communication services, ocean and weather observation for 7 years. As part of COMS, development of Ka band communication payload composed of microwave switching transponder and multi-horn antenna is sponsored by KCC (Korea Communications Commission) and developed by ETRI (Electronics and Telecommunications Research Institute). The purpose of Ka Payload development is to acquire space proven technology of Ka payload and to exploit advanced multimedia communication services. This paper aims to study development technology of Ka payload system through whole process of ETRI project. Also application of Ka payload will be dealt in this paper.

• The Bulletin of The Korean Astronomical Society
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• v.37 no.2
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• pp.120.2-120.2
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• 2012

천리안위성은 2010년 6월 발사되어 지구적도상공 약36,000km, 동경 128.2도에 위치하고 지구 자전 방향으로 지구와 같은 속도로 회전하며 24시간 한반도를 관측하는 정지궤도위성이다. 정지궤도위성은 높은 고도로 인하여 태양활동 변화에 따른 태양풍, 고에너지 전자 등에 의한 영향을 직접적으로 받는 환경에 놓여있다. 과거 사례들로부터 정지궤도위성의 오작동은 태양활동에 의해 다양한 현상으로 발생될 수 있다는 사실도 밝혀졌다. 본 연구에서는 2013년 태양활동 극대기를 대비하여 태양활동 변화가 천리안위성의 탑재체에 끼치는 영향에 대해 조사되었다. 천리안위성은 기상 해양관측을 위한 광학탑재체와 통신서비스를 위한 통신탑재체로 이루어져있다. 이 중 우리는 2011년에 발생된 X등급의 태양폭발 규모에 따라서 기상관측을 수행하는 기상탑재체 상태가 태양폭발이 없는 기간의 상태와 어느 정도 차이를 보이는지 분석하였다. 2011년에 발생된 경보는 3단계 10회, 4단계 2회로 발생빈도가 증가하는 추세이다. 4단계 경보의 태양폭발에도 천리안위성은 모든 부분에서 정상운영을 유지하고 있다. 이번연구를 통해 태양폭발 규모에 따른 기상탑재체의 영향 정도를 가시화하여 앞으로 발생 가능한 문제를 예측하고 대비함으로서 안정적인 위성운영을 도모하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.06a
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• pp.50-52
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• 2013

본 연구에서는 항로표지시설을 이용하는 항해사, 항로표지관련 담당자 및 유지관리 업체 등 사용자 및 관리자들이 항로표지시설에 대한 모든 상태정보를 실시간으로 확인하여 현장에서도 효율적인 유지관리 및 보수가 가능하도록 이용자들과 관리자들에게 위치기반서비스 제공을 위한 증강현실 기반의 항로표지 및 기상 정보제공서비스(InfoAtoN)와 항로표지시설관리(AtoNMan) 모바일 어플리케이션 플랫폼을 소개하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.05a
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• pp.208-209
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• 2023

Intelligent maritime traffic information service for maritime traffic safety operates a service that provides safe and efficient optimal safety routes considering information such as water depth, maritime safety law, weather information, and fuel consumption. However, from a service user's point of view, they prefer a route that suits their personal navigation experience and style, such as unnecessary detours and conservative safety distances for maritime objects. In this study, the optimal safety route can be extracted based on the experience of service users without reflecting the separate maritime environment by adjusting the weight of the trunk line for the area where the ship frequently navigates with the ship's track data collected through LTE-M model was studied.

• Journal of the Korea Convergence Society
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• v.12 no.10
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• pp.63-70
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• 2021

Generating a super-resolution meteological data by using a high-resolution deep neural network can provide precise research and useful real-life services. We propose a new technique of generating improved training data for super-resolution deep neural networks. To generate high-resolution meteorological data with domain specific knowledge, Lambert conformal conic projection and objective analysis were applied based on observation data and ERA5 reanalysis field data of specialized institutions. As a result, temperature and humidity analysis data based on domain specific knowledge showed improved RMSE by up to 42% and 46%, respectively. Next, a super-resolution generative adversarial network (SRGAN) which is one of the aritifial intelligence techniques was used to automate the manual data generation technique using damain specific techniques as described above. Experiments were conducted to generate high-resolution data with 1 km resolution from global model data with 10 km resolution. Finally, the results generated with SRGAN have a higher resoltuion than the global model input data, and showed a similar analysis pattern to the manually generated high-resolution analysis data, but also showed a smooth boundary.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.3 no.4
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• pp.705-714
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• 1999

Modem society is an information society. This study analyzed the present state of marine information system and the analytical framework showing the study about if it is possible to construct marine information network and marine information system service. The results of this study is as follow: First, developing and complete stage, marine informations organization must be constructed. Second, the marine information policy in future must be able to unify all the areas. Third, the marine information system in future must be able to unify all the information systems. fourth, marine information systems must consist of marine-travel area, fisheries area, marine industry area, port area.