Similar to conventional ocean bottom seismometers and ocean bottom cables, the attitude and position of vertical cables deployed on the seafloor should be calibrated. However, due to the effect of ocean currents, the cable attitude is not stationary. Therefore, a new method for the dynamic repositioning of vertical cables is required. The dynamic repositioning of the hydrophones on vertical cables plays an important role in accurately describing the structure of the stratum and establishing an accurate velocity model. To realize the dynamic positioning of marine vertical cables, the shot lines are divided according to time, the first break time objective equation is established and the receiver position in each time period is obtained using the inversion methods outlined in this work. By analysing the trace spacing, first break time, shot point coordinate accuracy, temporal resolution, shot line spacing and other factors after repositioning, it is found that the first break time pickup accuracy and shot line spacing are the main factors that affect the repositioning accuracy. Furthermore, the resolution is limited by the timing of a single shot line. Additionally, the trace spacing after repositioning is consistent with the actual situation, which verifies the correctness and feasibility of this method.

中文翻译：

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海洋地震垂直缆动力定位方法及精度分析

与传统的海底地震仪和海底电缆类似，部署在海底的垂直电缆的姿态和位置需要进行校准。然而，由于洋流的影响，电缆姿态并不是静止的。因此，需要一种新的方法来动态重新定位垂直电缆。垂直电缆上水听器的动态重新定位对于准确描述地层结构和建立精确的速度模型具有重要作用。为了实现海洋垂直电缆的动态定位，根据时间划分炮线，建立首断时间目标方程，并利用本文提出的反演方法获得每个时间段的接收机位置。通过对重定位后轨迹间距、初断时间、炮点坐标精度、时间分辨率、炮线间距等因素进行分析，发现首断时间拾取精度和炮线间距是影响重定位精度的主要因素。此外，分辨率还受到单次发射线时间的限制。另外，重新定位后的走线间距与实际情况相符，验证了该方法的正确性和可行性。