海洋磁力测量过程中的误差分配规律分析
Error Source and Error Compensation Method in Marine Magnetic Survey
摘要:
影响海洋磁力测量的误差可以分为实时测量误差和非实时测量误差，实时测量误差包括GPS、磁力仪系统产生的测量误差。非实时测量误差包括海洋磁力测量实施过程中的误差、拖鱼定位误差和正常场校正误差，还包括固有的地磁日变改正、船磁改正、拖鱼位置归算误差的影响以及数据整理、处理过程产生的误差。海洋磁力测量准确度以主、联络测线相交点的测量值差的均方根值作为衡量依据，各种误差最终影响均方根的值，在不同精度的海上磁力测量中对这些误差进行比较分析，建立了海洋磁力测量误差数据处理模型，发现误差影响的分配规律变化。
Abstract:
The errors affecting the marine magnetic force measurement can be divided into real-time meas-urement errors and non-real-time measurement errors. The real-time measurement errors include measurement errors generated by GPS and magnetometer systems. Non-real-time measurement errors include errors in the implementation of marine magnetic measurements, dragging fish positioning errors, and normal field correction errors, as well as intrinsic daily changes in geomagnetic field, ship magnetic corrections, influences of dragging fish position reduction errors, and data collation and error generated by the process. Marine magnetic measurement accuracy is based on the root mean square value of the measured value difference between the intersections of the main and contact survey lines. Errors ultimately affect the RMS value. These errors are compared in marine magnetic surveys of different precisions. Based on the analysis, a data pro-cessing model of ocean magnetic measurement error was established, and the distribution rule of the influence of error was found.
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