![]() The positioning accuracy of this method is generally meters (3~10 m), and higher positioning precision for a large number of seismometers within the sub-meter level is a challenge. There are two traditional methods for locating the position of seismometers, one of which is the first break secondary positioning (FBSP) method. ![]() The results show that the newly proposed method is able to make full use of the acoustic observation data of hundreds of transponders to accurately estimate the SRB correction, which could also significantly improve the positioning accuracy of multiple transponders.ĭuring data acquisition using ocean bottom seismometers (OBS) in shallow water, it is usually necessary to locate a large number of submarine seismometers. The observability analysis is discussed in simulation and testing experiments in the South China Sea. The parameters of the new model are divided into groups and estimated by sequential least squares method, together with all of the transponders. In this paper, the effect of sound ray bending is analyzed based on the sound ray tracing method in shallow water, and a new piecewise incidence angle model is proposed to improve the positioning accuracy of multiple objects in order to estimate the sound ray bending correction. Due to the refraction effect of sound, the technique usually showed poor positioning accuracy in shallow water when the incidence angles are large. The previous single transponder positioning method ignored the similar underwater environments between the transponders. The Global Navigation Satellite System combined with acoustic technique has achieved great economic benefits in positioning of ocean bottom seismometers, with hundreds of underwater transponders attached to seismometers typically being deployed during oil exploration.
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