An extended surface target for high-frequency multibeam echo sounder calibration
2017; Acoustical Society of America; Volume: 141; Issue: 4 Linguagem: Inglês
10.1121/1.4980006
ISSN1520-9024
AutoresJohn Heaton, Glen Rice, Thomas C. Weber,
Tópico(s)Seismic Waves and Analysis
ResumoAn extended calibration target has been developed for calibrating the intensity output of a multibeam echo sounder (MBES). The target was constructed of chain links arranged similar to a curtain, providing an extended surface target with a mean scattering strength of −17.8 dB at 200 kHz. The target was used to calibrate a 200 kHz MBES, and the MBES was subsequently used to collect seafloor backscatter over sand and gravel seafloors. Field results were compared with calibrated split-beam echo sounder measurements at an incidence angle of 45°. The results suggest that the chain target is a viable MBES calibration tool.
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