Influence of systematic error on the magnetic anomaly map in marine magnetic survey

The systematic errors exist in each survey line and with different features in different survey lines, which greatly influence the precision of survey products. The influences of the systematic errors to the interpolation precision have been analyzed, and the influencing rule of the systematic errors on the contour lines on magnetic anomaly map have been discussed. The simulations showed that the position and local direction of the contour line can be changed by the systematic errors. Moreover the position and the shape near the certain survey line area are mainly affected, but have little effects in the other areas. To improve the precision of the magnetic anomaly map, the systematic errors must be strictly controlled and eliminated with effective adjustment methods in marine magnetic survey.