【摘要】 为了获得海底地震仪(ocean bottom seismograph,OBS)在海洋地球物理勘探中更真实准确的数据处理剖面,必须消除导航、定位时间、定位精度对OBS数据采集和处理的影响。通过分析时间定位精度对OBS数据处理的影响及计时误差来源,开发了精密枪控计时器以提高时间定位精度和消除常规计时误差,计时精度达到0.01ms,实现了高精度导航定位、炮点定位、时间定位和计时,保证OBS地震数据采集的准确性和精度。经稳定性测试,生产试验后的数据分析表明,该设备时间精确、定位性能完全满足OBS多分量地震勘探要求并可应用于其他需要高精度计时的海洋地球物理勘探领域。更多还原

【Abstract】 In order to obtain raw and accurate data processing section of ocean bottom seismograph(OBS) in marine geophysical exploration,negative effects of positional time and positional accuracy in acquisition and processing must be eliminated.Through analyzing the effects of the accuracy of positional time in OBS data processing and analyzing the timing error sources,we developed a gun controlling chronograph to improve positional precision and to eliminate conventional timing error;the accuracy can reach 0.01 ms,to realize high accuracy of navigation shotpoint time positioning and timing and to ensure the accuracy in OBS data acquisition.The results of stability testing and production testing show the time fixing capacity of chronograph can meet the demands of OBS multi-component acquisition perfectly,as well as in other marine geophysical prospecting areas that need high accuracy timing.更多还原