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NTIS 바로가기암석학회지 = The journal of the petrological society of korea, v.22 no.1, 2013년, pp.35 - 47
이덕수 (주식회사지앤 기업부설 연구소) , 최승찬 (Kiel 대학교) , 오창환 (전북대학교 지구환경과학과) , 서민호 (주식회사지앤 기업부설 연구소) , 유인창 (경북대학교 지질학과)
The Baegdusan Volcano which erupted violently at 1000 AD is still have possibility of eruption. Therefore, it is necessary to monitor regularly the possibility of eruption. However, it is very difficult to install regular monitoring system or to get regularly monitored data due to geopolitic problem...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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그레이스 위성의 주된 임무는 무엇인가? | 그레이스 인공위성 프로젝트는 1997년 5월 NASA ESSP(Earth System Science Pathfinder)프로젝트의하나로 시작되었고, 그레이스 인공위성은 Tom과 Jerry 두 개의 쌍둥이 위성으로 구성되며, 두 위성간의 속도변화를 측정하여 중력장변화를 결정하게 된다. 그레이스 위성의 주된 임무는 지구의 중력장 모델을결정하고, 지구 중력장의 시·공간적 변화를 탐지하는 것이다. 그레이스 인공위성은 과거 수십 년간 관측한 중력 데이터 보다 더 많은 양의 중력데이터를월별로 약 400 km의 공간 해상도에서 2-3 mm에 달하는 고정밀도의 중력장 시계열변화 분석이 가능하다 (Tapley et al, 2004; Huang, 2010). | |
H-L SST 방식은 어떤 방식인가? | 위성이 이론상의 궤도를 돌 때에 지구 내부의 물질의 차이에 따라서 이론적인 궤도를 이탈하여 지구 내부의 물질이 평균 밀도보다 높은 곳에서는 지구 쪽으로 끌리고 물질이 낮은 곳에서는 그 반대쪽으로 끌리는 현상이 일어나게 될 때에, 그 힘을 측정하고 이를 역산하여서 지구 중력장을 계산해 내는 자료를 지상으로 송신하게 된다. 즉 H-L SST 방식은 위성을 자유낙하체로 간주하고, 위성의 위치를 GPS로 정확하게 결정함으로써 절대 중력 측정을 실시하는 방식이다. 이런 원리는 그레이스 내부에 탑재된 Accelerometer도 같은 원리로 되어있다. | |
백두산의 화산 분출 역사를 4개의 시기로 구분한다면? | 백두산의 화산 분출 역사는 분출 연령, 분출 형태 그리고 마그마 성분의 변화를 바탕으로 4개의 시기로 구분된다. 첫 번째 시기는 현무암 용암대지를 형성한 시기이며, 이는 현무암 순상암체를 형성한 두 번째 시기로 이어지며, 세 번째 시기에는 조면암질 복합 화산이 형성되고, 최종적으로 화산쇄설암을 형성한 격렬한 분출이 있었다(Wei et al., 2007). |
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