Abstract
Accurate measurements of the upper ocean velocity field can now be made using Doppler sonar. Doppler measurements can be made with a wide variety of transducers provided that signal generation and echo processing techniques suitable for Doppler are applied. This paper describes a Doppler sonar controller which was designed to operate a variety of experimental Doppler systems. The controller can generate sequences of eight tones, each with independently prescribed frequency, duration and start time. The received echos are complex heterodyned and low-pass filtered to remove the carrier frequencies. The data is then passed to a computer for subsequent analysis. A simplified method of digital frequency synthesis used in the controller is described. The controller has proven to be exceptionally versatile in both oceanic and laboratory tests.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
