DocumentCode :
1051259
Title :
A versatile sonar system for ocean research and fisheries applications
Author :
Acker, William C. ; Wirtz, Alan R.
Author_Institution :
Univ. of Washington, Seattle, WA, USA
Volume :
6
Issue :
3
fYear :
1981
fDate :
7/1/1981 12:00:00 AM
Firstpage :
107
Lastpage :
109
Abstract :
An echo sounder has been developed with features ideally suited to oceanographic and fisheries research. Instruments commonly used for such research are inaccurate, limited in dynamic range, unstable, and generally inflexible. An effort has been made to overcome these deficiencies with the sonar system discussed here. The echo sounder to be described has a time-varied-gain receiver ( 
or 
) accurate to within 
dB over a 100-dB range. The equivalent dynamic range is 140 dB (the ratio of the maximum signal at minimum gain to the equivalent input noise at maximum gain in a 4-kHz bandwidth). The temperature stability is dB from 
to 
C at any range. Operating parameters, including frequency, can be easily altered to accommodate a variety of needs.
or ) accurate to within dB over a 100-dB range. The equivalent dynamic range is 140 dB (the ratio of the maximum signal at minimum gain to the equivalent input noise at maximum gain in a 4-kHz bandwidth). The temperature stability is dB from to C at any range. Operating parameters, including frequency, can be easily altered to accommodate a variety of needs.Keywords :
Aquatic animals; Sea measurements; Sonar; Acoustic noise; Aquaculture; Bandwidth; Dynamic range; Instruments; Ocean temperature; Signal to noise ratio; Sonar applications; Stability; Temperature distribution;
fLanguage :
English
Journal_Title :
Oceanic Engineering, IEEE Journal of
Publisher :
ieee
ISSN :
0364-9059
Type :
jour
DOI :
10.1109/JOE.1981.1145490
Filename :
1145490
Link To Document :
