Chirp SBP 원시 자료 기록을 위한 취득시스템 구축 및 현장 적용
Chirp SBP Data Acquisition System Construction for Raw Data and Its Field Applications
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초록
Chirp SBP(Sub-Bottom Profiler)는 해양에서 엔지니어링 탐사, 해양환경 연구 및 자원 탐사 등 다양한 분야와 연구에 활용되고 있는 고해상 탄성파탐사이다. Chirp SBP는 일반적으로 자료취득시스템에서 제공하는 위상 정보를 포함하지 않는 엔벨로프 형태의 자료만을 활용하고 있다. 이 연구에서는 극성 및 위상 정보를 포함한 Chirp SBP의 원시 자료를 기록할 수 있는 새로운 자료취득시스템을 구축하였다. 이 시스템의 비교 검증을 위하여 기존의 상용 시스템을 이용하여 동시에 자료를 취득하였다. Chirp SBP 음원의 스윕 파형지문을 추정하여 취득 자료와 상관한 후, 너울 효과 제거와 곱풀기 등의 자료처리과정을 통해 위상 정보를 포함한 Chirp SBP의 단면도와 엔벨로프 형태의 단면도를 제작하였다. 기존의 단면도와 비교 분석한 결과, 지층의 연속성과 해상도가 더 우수한 것으로 확인되었다.
Abstract
Chirp SBP(Sub-Bottom Profiler) is a marine high-resolution seismic system applied in a variety of marine geological and geophysical fields. Commercial Chirp SBP data acquisition systems provide the seismic data of the envelope type without polarity and phase information. In this study, we constructed the new data acquisition system that records the raw data preserving the polarity and phase information. Field data were acquired simultaneously using the newly constructed system and the conventional Chirp SBP system. For Chirp SBP signature estimation, various sweep signatures were generated and compared. After the correlation of seismic data with the estimated sweep signature, swell effect correction and deconvolution were applied. The Chirp SBP section preserving polarity and phase information was generated and the envelope section was produced also for the comparison purpose. The final Chirp SBP section with the polarity and phase information shows better continuity of the sedimentary layers and higher resolution.
참고문헌 (23)
- Bull, J.M., "Reflection coefficient calculation from marine high resolution seismic reflection (Chirp) data and application to archaeological case study", Marine Geophysical Researches, 20, pp.1~11 (1998)
- Chang, J. K., "Seabed Classification using the K-L(Karhunen-Loève) transform of chirp acoustic profiling data: An effective approach to geoacoustic modeling", The Sea, 3(3), pp.158~164 (1998)
- Chang, J.K, "Geoacoustic modeling for analysis of attenuation characteristics using chirp acoustic profiling data", Geophysics and Geophysical Exploration, 2(4), pp.202~208 (1999)
- Farnbach, J.S., "The complex envelope in seismic signal analysis", Bulletin of the Seismological Society of America, 65(4), pp.951~962 (1975)
- Gutowski, M., "Chirp sub-bottom profiler source signature design and field testing", Marine Geophysical Researches, 23, pp.481~492 (2002)
- Henkart, P., "Chirp sub-bottom profiler processing - A review", pp.35~38 (2006), Sea Technology magazine
- Kim, C. S., "Comparison the resolution with respect to the frequency of the Chirp SBP for detection of buried objects in the seabed", Proceedings of the Korea Society of Marine Engineers Conference Spring Annual Meeting, Gyeongju, Korea, pp.173~174 (2008)
- Kim, G. Y., "Physical properties of mudbelt sediments in the southeastern inner shelf of Korea", The Sea, 4(4), pp.338~348 (1999)
- 김영준, "Chirp SBP 자료 해상도 향상을 위한 전산처리연구", 지구물리와 물리탐사, 14(4), pp.289~297 (2011), 한국지구물리.물리탐사학회
- LeBlanc, L. R., "Marine sediment classification using the chirp sonar", J. Acoustical Society of America, 91(1), pp.107~115 (1992)
- LeBlanc, L.R., "The evolution of the chirp sonar high resolution sub-bottom sonar", 162nd Meeting: Acoustical Society of America, San Diego, California, pp.2338~ (2011)
- Lee, G. H., "Shallow gas in the central part of the Korea Strait shelf mud off the southeastern coast of Korea", Continental Shelf Research, 25, pp.2036~2052 (2005)
- Lee, H.Y., "Suppression of swell effect in 3.5 kHz subbottom profiler data", The Sea, 7(3), pp.95~99 (2002)
- Morang, A., "Monitoring the coastal environment; Part Ⅲ: geophysical and research methods", J. of Coastal Research, 13(4), pp.1064~1085 (1997)
- Panda, S., "Sediment classification based on impedance and attenuation estimation", J. Acoustical Society of America, 96(5), pp.3022~3035 (1994)
- Plets, R.M.K, "3D reconstruction of a shallow archaeological site from high-resolution acoustic imagery: The Grace Dieu", Applied Acoustics, 69, pp.399~411 (2008)
- Quinn, R., "Imaging wooden artefacts using chirp sources", Archaeological Prospection, 4, pp.25~35 (1997)
- Quinn, R., "The Mary Rose Site -geophysical evidence for palaeo-scour marks", The International J. of Nautical Archaeology, 26(1), pp.3~16 (1997)
- Quinn, R., "Optimal processing of marine high-resolution seismic reflection (Chirp) data", Marine Geophysical Researches, 20, pp.13~20 (1998)
- Schock, S.G, "Chirp subbottom profiler for quantitative sediment analysis", Geophysics, 54(4), pp.445~450 (1989)
- 신성렬, "SBP탐사를 이용한 사석분포 Mapping", 한국자원공학회지, 43(3), pp.194~205 (2006), 한국자원공학회
- 신성렬, "인공어초지역에 대한 사이드스캔소나와 SBP 탐사 자료처리", 지구물리와 물리탐사, 12(2), pp.192~198 (2009), 한국지구물리.물리탐사학회
- Yilmaz, O., "Seismic data analysis Vol. 1", Society of Exploration Geophysicists, Tulsa, OK, 219~222 (2001)