时差对海洋磁力测量地磁日变改正的影响分析

摘要

为研究时差对磁测的影响,基于站间同步地磁日变曲线的特征,尝试采用同步比对法和相关分析法计算两站的时差.结论表明:同步比对法和相关分析法能反映站间真实的时差,当测区范围较小时(至少是在本文实例的两个地磁日变站之间),时差对地磁日变改正的影响很小,海洋磁力测量地磁日变改正时可以忽略其影响.%Based on the characteristic of synchronous curve of geomagnetic diurnal variation, synchronous comparison method and correlation analysis method have been adopted to calculate time difference. Furthermore, influence caused by the time difference has been analyzed by the synchronous observed data. The conclusions show that time difference can be effectively obtained by synchronous comparison, when the survey area is less enough-less than the area discussed in this paper, influence caused by the time difference can be neglected.