海底电缆地震采集系统──初至波二次定位成果的质量评价

Seismic data acquisition system using ocean bottom cable:quality evaluation of first-break secondary positioning result

海底电缆产波水下二次定位技术解决了检波器在水下实时定位问题，但存在着无解点和易受干扰等不足。为此，我们引进了海底电缆初至波定位技术。本文简述了初至波定位技术的原理，并对声波水下定位系统和初至波定位系统进行了比较，最后得出了对初至波定位成果资料的质量评价原则，即：野值是否过多，整体偏差性趋势是否明显，点位间隔要合理，与其它定位成果作比较。

Although underwater acoustic secondary positioning technique relating to ocean bottom cable has solved the underwater real-time positioning problem of hydrophones, yet there are still some deficiencies such as no solution point and easy disturbance by other factors. First-break positioning technique for ocean bottom cable is then introduced to remove above deficiencies. First-break positioning technique is described briefly in its principle, and then it is compared with underwater acoustic positioning technique,Finally, quality evaluation criteria for first-break positioning result are given, which include no or few wild values, no obvious whole deviation, reasonable point interval and comparison with other positioning result.