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| | Abstract | | The new reflection seismic methods, using both seafloor based sound source and the Vertical Cable Seismic, have been studied for the exploration of the ocean bottom hydrothermal deposits. On September 2011, the practical aspects of the methods were tested successfully at Izena Cauldron, Okinawa Area. The data acquisition system worked fine in the experiments, but there were several problems especially to determine the position of the source and VCS. In order to define the position of those components effectively and precisely, iterative calculations using the arrival time of the direct wave were performed, and the method is explained in this paper. From the results of the comparison of the several calculations, we could verify the effectiveness of this method. Although this iterative calculation method is practical, still we need to get more accurate position data to compare with this calculation and to estimate the accuracy. |
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