Title :
Development of a shipboard acoustic Doppler current profiler
Author :
Kuroda, Yoshifumi ; Kai, Gentaro ; Okuno, Kiyonori
Author_Institution :
Japan Marine Sci. & Technol. Center, Yokosuka, Japan
fDate :
31 Oct-2 Nov 1988
Abstract :
A shipboard long range acoustic Doppler current profiler (ADCP) was developed that can measure vertical profiles of ocean currents and acoustic backscattering strength in 32 layers up to a depth of 400 m and track the sea bottom up to a depth of 1000 m. The profiler incorporates a 70-kHz, phased-array acoustic transducer module, and an advanced signal processing method based on the autocorrelation function is used to derive the mean Doppler shift frequency from the received acoustic signal. To confirm the performance of the ADCP, the transducer and transmitter-receiver unit were tested in the open sea. Comparison between the ADCP and Aanderaa current meters (RCM) was also carried out. Results showed that the system can measure the ocean current velocity and the scattering strength up to a depth of 400 m
Keywords :
acoustic equipment; oceanographic equipment; sonar; 70 kHz; ADCP; acoustic backscattering strength; autocorrelation function; long range; ocean bottom profiler; ocean current velocity; ocean dynamics; phased-array acoustic transducer module; sea bottom; seafloor; shipboard acoustic Doppler current profiler; signal processing method; sonar; underwater sound; vertical profiles; Acoustic measurements; Acoustic signal processing; Acoustic transducers; Autocorrelation; Backscatter; Current measurement; Doppler shift; Frequency; Oceans; Sea measurements;
Conference_Titel :
OCEANS '88. A Partnership of Marine Interests. Proceedings
Conference_Location :
Baltimore, MD
DOI :
10.1109/OCEANS.1988.23527
