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Standard-target calibration of an acoustic backscatter system

January 1, 2010

The standard-target method used to calibrate scientific echo sounders and other scientific sonars by a single, solid elastic sphere is being adapted to acoustic backscatter (ABS) systems. Its first application, to the AQUAscat 1000, is described. The on-axis sensitivity and directional properties of transducer beams at three operating frequencies, nominally 1, 2.5, and 4 MHz, have been determined using a 10-mm-diameter sphere of tungsten carbide with 6% cobalt binder. Preliminary results are reported for the 1-MHz transducer. Their application to measurements of suspended sediment made in situ with the same device is described. This will enable the data to be expressed directly in physical units of volume backscattering.

Publication Year 2010
Title Standard-target calibration of an acoustic backscatter system
DOI 10.1109/OCEANS.2010.5664362
Authors Kenneth G. Foote, Marinna A. Martini
Publication Type Conference Paper
Publication Subtype Conference Paper
Series Title Oceans Conference Record
Index ID 70190328
Record Source USGS Publications Warehouse
USGS Organization Woods Hole Coastal and Marine Science Center