【摘要】 海洋二维地震勘探水下设备的定位,方向角是最基础的参数,目前使用的电子罗盘的磁偏角,须经校正才能获得实际的方向角,磁偏角仪可为此提供实时校正参数。论述了磁偏角测量的原理,分析了二维地震导航运算过程中剩余测量角度闭合差产生的原因,最后介绍了磁偏角仪在目前的应用。更多还原

【Abstract】 Directional angle is the most basic parameter in subsea equipment navigation during offshore 2D seismic survey.So far, the magnetic declination of electronic compass should be calibrated to get the real directional angle.Declinometer can provide real time calibration parameters.In this article,the principle of magnetic declination measurement is discussed,and the reasons for closure error in residual measurement angle during navigation arithmetic process for 2-D offshore seismic survey.Finally,a brief introduction is given to the current application of declinometer.更多还原