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Acoustic backscatter from acoustic profiling instrumentation is commonly used as a proxy for suspended sediment concentrations. Past calibration procedures have used suspended beads or natural sediment to relate system output to sediment concentration. A new approach seeks to separate the instrumentation system constant from parameters that are dependent on the particles in the water column. Protocols...
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...
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