基于梯度数据的远海日变处理方法

A Diurnal Correction Method for Far Sea Magnetic Survey Based on Gradient Data

岸台日变站控制范围有限,海底日变站布放和回收困难、安全无法保证,远海区开展磁力测量面临着日变改正的技术瓶颈。研究海洋磁力梯度测量原理及梯度数据特点,首次提出同步测点的概念,建立了一套严密计算模型,可为每条测线重构日变改正。

Because of coast diurnal station beyond control area and seabed diurnal station difficult to place and recover with low security guaranty,marine magnetic survey far beyond the sea is faced with a challenge of diurnal correction problem. The principle of marine magnetic gradient survey and its data characteristics are researched,and a new concept termed as simultaneous survey point is first presented,and a set of precise mathematic model are accordingly produced to calculate diurnal correction alone every survey line.