Imaging of long‐range reverberation from ocean basin topography
作者:
FredT. Erskine,
GaryM. Bernstein,
EdwardR. Franchi,
BuddB. Adams,
期刊:
Marine Geodesy
(Taylor Available online 1986)
卷期:
Volume 10,
issue 1
页码: 69-78
ISSN:0149-0419
年代: 1986
DOI:10.1080/01490418609388012
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
A technique is currently under development a the Naval Research Laboratory for imaging of backscatterec acoustic returns from ocean basin topography. The method is straightforward. An explosive sound source is detonated near the center of an ocean basin and the round‐trip travel time from source to reflectors and return is measured. Distance to back‐scattering topography is assumed to be proportional to round‐trip time, with a proportionality constant equal to half the sound speed. A multielement receiving array is used to determine the azimuthal directions to topographic features. Reverberation data are output to an imaging system to study the spatial distribution of sea bottom reverberation. The images are in the form of two‐dimensional maps of backscattered acoustic energy. Typical maps are larger than 2,000 km x 2,000 km (or area coverage greater than 4 x 106km2). After correction of maps from individual shot detonations for range‐dependent propagation losses, we average ("integrate") maps together on a pixel by pixel basis for a clear picture of major basin reverberators.
点击下载:
PDF (491KB)
返 回