Amplitude and spectral characteristics of low grazing angle backscattering
作者:
Paul D. Koenigs,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1986)
卷期:
Volume 80,
issue S1
页码: 128-128
ISSN:0001-4966
年代: 1986
DOI:10.1121/1.2023654
出版商: Acoustical Society of America
数据来源: AIP
摘要:
Acoustic backscattering from the sea surface at grazing angles in the region of 5 deg is affected by shadowing. Under these conditions the equations presented by Basset al.[IEEE Trans. Antennas Propag.AP‐16(5) (Sept. 1968)] may be combined to form a single equation. The agreement between experimental data near 1 kHz and the unified equation is good. The frequency shift of the backscattered acoustic energy is dependent on wave height and period through the horizontal orbital particle velocity. The frequency spread of backscattered energy is still dependent on the same particle velocity but is diminished because the wave troughs are preferentially insonified. The experimentally determined values of backscattering strength compare favorably with other reported low‐frequency, low grazing angle data.
点击下载:
PDF
(67KB)
返 回