... for sinking the immerse tunnel elements based on underwater acoustic positioning technique and the simulation results show that the algorithm has a good precision in positioning the tunnel elements. distance sensor positioning method automatic total station tunnel element transceiver immerse...

... show that the element spacing should be less than 0.5λ to break the diffraction limit with the planar array only made of dipole transceivers in the near field and the optimal element spacing is 0.15λ. With increasing frequency the field magnitude increases and the spatial resolution decreases...

... the performance of USBL (Ultra Short Baseline) systems is quite effective, it subjects to various potential sources of error including alignment, travel times, and angle measurements (Philip, 2003a). With regard to the alignment error, it usually occurs when the USBL transceiver cannot be assembled...

..., Endurance 6 hours Operation mode UROV / AUV Propulsion 2 horizontal 100 Watt thrusters with tilt system, 1 vertical 100 Watt thruster Communication instrument 2 G bps optical communication device , Radio LAN, ARGOS transmitter, acoustic and magnetic transceiver*. (HDTV, 100 baseT) Navigation instrument MEMS...

... sampler transceiver mini grabber kaiko probe secondary cable interface rov on-board equipment ocean sediment probe thruster grabber vehicle deepest depth launcher sampler Paper No. 2006- Last (family) name of first author The Two-stage ROV to the Oceans Deepest Depth Hiroshi Yoshida...

... (Munk and Wunsch, 1979). The conventional ocean acoustic tomography system is limited for the research use because the system has no means to deliver observed data horn the open sea to the land. mean vorticity kuroshio extension transceiver tomography hydrophone array ocean acoustic...