Schematic illustration of underwater two-way acoustic positioning in a GNSS-A system. (IMAGE)

Aerospace Information Research Institute, Chinese Academy of Sciences

Schematic illustration of underwater two-way acoustic positioning in a GNSS-A system.

Caption

Schematic illustration of underwater two-way acoustic positioning in a GNSS-A system. GNSS determines the position of the sea-surface platform, and the transducer position is obtained after lever-arm correction and coordinate transformation. The platform transmits an acoustic signal at S(ti+), the seafloor transponder responds to the signal, and the returned signal is received at S(ti-). β denotes the local incidence angle along the acoustic ray, and z denotes the zenith angle at reception.

Credit

Satellite Navigation

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License

CC BY

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