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양상태 해수면 음파산란 측정

Title
양상태 해수면 음파산란 측정
Other Titles
Measurements of Bistatic Sea Surface Scattering Signals
Author
나정열
Keywords
양상태 해수면 산란; 잔향음; 파수 스펙트럼; 자기상관함수; 해수면 거칠기; Biststic sea surface scattering; Reverberation; Wave-number spectrum; Autocorrelation; Sea surface roughness
Issue Date
2001-05
Publisher
한국음향학회
Citation
한국음향학회지, v. 20, no. 4, page. 81-86
Abstract
126-kHz양상태 해수면 음파산란 측정을 강원도 삼척시 연안에서 수행하였다. 수평입사각을38%, 52%로 고정시킨 상태에서 트랜스듀서와 청음기의 거리를 변화시키면서 산란각의 변화에 따른 전방산란 신호의 변화를 관찰하였다. 해저면 산란신호와는 달리 해수면 산란신호는 해수면 유동성에 의해서 도달시간 변이와 진폭의 변이를 나타내었으며 신호간의 상관관계도 불규칙적인 경향을 나타내었다. 전방산란강도를 계산하여 Kirchhoff approximation (KA)과 small slope approximation (SSA)을 비교한 결과 두 모델 모두 실측치와 잘 일치하였다. 126-kHz bistatic sea surface scattering measurements were conducted in the shallow waters off the east coasts of Korea. The range from source to receiver was altered to change the scattering angle at the grazing angles of 38% and 52% . Unlike bottom scattering signal, the arrival time and the amplitude of sea surface scattering signals were varied due to the fluctuation of sea surface. The measured forward scattering strengths were compared to model predictions of Kirchhoff approximation and small slope approximation. In overall, the tendency of the scattering strengths showed reasonable agreement among the experimental data, Kirchhoff approximation, and small slope approximation.
URI
https://scienceon.kisti.re.kr/srch/selectPORSrchArticle.do?cn=JAKO200111921140350https://repository.hanyang.ac.kr/handle/20.500.11754/158454
Appears in Collections:
COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > MARINE SCIENCE AND CONVERGENCE ENGINEERING(해양융합공학과) > Articles
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