• Proceedings of the KSEEG Conference
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• 2000.04b
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• pp.160-162
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• 2000

• Proceedings of the KSEEG Conference
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• 2000.04b
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• pp.190-191
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• 2000

• Proceedings of the KSEEG Conference
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• 2000.04b
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• pp.192-193
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• 2000

• Proceedings of the KSEEG Conference
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• 2000.04b
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• pp.194-196
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• 2000

• Proceedings of the KSEEG Conference
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• 2000.04b
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• pp.197-198
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• 2000

• Geophysics and Geophysical Exploration
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• v.25 no.1
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• pp.26-37
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• 2022

Recently, multiple methods using small aircraft for geophysical exploration have been suggested as a result of the development of information and communication technology. In this study, we introduce the hybrid unmanned aircraft electromagnetic system of the Korea Institute of Geosciences and Mineral resources, which is under development. Additionally, data processing and interpretation methods are suggested via the analysis of datasets obtained using the system under development to verify the system. Because the system uses a three-component receiver hanging from a drone, the effects of rotation on the obtained data are significant and were therefore corrected using a rotation matrix. During the survey, the heights of the source and the receiver and their offsets vary in real time and the measured data are contaminated with noise. The noise makes it difficult to interpret the data using the conventional method. Therefore, we developed a recurrent neural network (RNN) model to enable rapid predictions of the apparent resistivity using magnetic field data. Field data noise is included in the training datasets of the RNN model to improve its performance on noise-contaminated field data. Compared with the results of the electrical resistivity survey, the trained RNN model predicted similar apparent resistivities for the test field dataset.

• Geophysics and Geophysical Exploration
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• v.25 no.1
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• pp.14-25
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• 2022

The passive surface wave method measures seismic signals from ambient noises or vibrations of natural phenomena without using an artificial source. Since passive sources are usually in lower frequencies than artificial ones being able to ensure the information on deeper geological structures, the passive surface wave method can investigate deeper geological structures. In the passive method, frequency dispersion curves are obtained after data acquisition, and the dispersion curves are analyzed by assuming 1D-layered earth, which is like the method of active surface wave survey. However, when computing dispersion curves, the passive method first obtains and analyzes coherence curves of received signals from a set of receivers based on spatial autocorrelation. In this review, we explain how passive surface wave methods measure signals, and make data processing and interpretation, before analyzing field application cases.

• Proceedings of the KSEG Conference
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• 2004.03a
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• pp.15001-15097
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• 2004

원격탐사란 직접적인 접촉 없이 대상물의 전자파 반사 특성을 파장별로 측정하여, 이를 처리, 해석함으로써 대상물에 대한 속성, 상태, 위치 및 형태에 대한 정보를 얻고자 하는 기술이다. 특히 획득된 자료가 영상(image)으로서 표현될 수 있으며, 영상을 매체로 하여 처리되고 해석된다는 점이 원격탐사 기술의 특징이다. 1972년에 미국의 항공우주국(NASA)이 지구자원 기술위성(Earth Resources Technology Satellite)을 성공적으로 발사함으로써 세계 최초의 위성 관측에 의한 원격탐사가 시작된 이래. 원격탐사 기술은 지도제작. 자원탐사, 지질조사, 지구환경, 해양 및 기상 등 다양한 분야에서 활발하게 활용되고 있다. 현재 우리나라를 비롯하여 미국, 캐나다, 프랑스, 일본, 인도 등 세계 각국이 각자 지구관측용 원격탐사 위성을 보유하고 있다. (중략)

• The Journal of Engineering Geology
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• v.3 no.2
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• pp.101-114
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• 1993

GIS technique was applied to identify the regional hydrologic units for groundwater exploitation and recharge analysis in a study area. The technique was very effective to identify the potential areas for groundwater exploitation, and for groundwater management & land use planning. GIS database of environmental resources was complied from a variety of sources and scales as the foundation for analysis, including digitizing and scanning of hardcopy maps. A DEM(Digital Elevation Model) was used to dassify slopes, and identify problematic drainage system. Quantitative analysis of environmental resources helps us to develop the scoring system of GIS model, which evaluates each resource in relation to the others and reflects the relative importance of each resource. ARC4NFO was used to construct digital database, and the cartographic simulation techniques were applied in order to create new maps.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2003.04a
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• pp.15-20
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• 2003

한국항공우주연구원은 공공기술연구회 산하 한국지질자원연구원, 한국해양연구원, 한국건설기술연구원과 협력하여 2002년 4월 17일에 본격적인 원격탐사 연구 및 공공지원 업무의 주축을 담당하게 될 공공원격탐사센터를 설립하였다. 별도의 독립조직이 아니라 원격탐사위성인 아리랑위성을 개발, 운영하고 있는 한국항공우주연구원을 중심으로, 한국해양연구원, 한국지질자원연구원, 한국건설기술연구원등 관련기관이 해양분야, 지상분야, 건설분야 등 각 전문분야 별로 협동연구 체계를 구축, 실질적인 국가원격탐사센터 역할을 수행할 것이다. 이와 같이 설립된 공공원격탐사센터에 대한 홍보, 위성자료의 공공활용 지원 및 원격탐사 Tutorial 등을 사용자들이 쉽게 접속하여 이용할 수 있도록 공공원격탐사센터 홈페이지를 구축하여 Open 하게 되었다. 공공원격탐사센터 본부인 한국항공우주연구원을 비롯하여 전문센터별로도 홈페이지를 구축하여 서로 연결되도록 하였다. 2003년도에는 이와 같이 open 된 홈페이지에 위성자료 통합 DB를 구축하여 서비스할 예정이다.