The geomagnetic field is a vector field in space.However,traditional marine magnetic surveys focus on geomagnetic field in-tensity,failing to fully acquire and utilize rich information about the geomagnetic vector field.Given this,this study developed a towed marine geomagnetic vector measurement system.This system was designed to operate in dynamic marine conditions and ultimately ac-quire geomagnetic vector field data within the geographical coordinate system.Through sea trials of the system,grid line and repeat line measurements were obtained.After preprocessing the collected data,the measurement accuracy of repeat lines and crosspoints was bet-ter than 6.7 nT and 6 nT,respectively.The results of the sea test indicate that the measurement system has the preliminary ability to measure the geomagnetic vector field at sea,and it can be applied to geomagnetic field measurement tasks near or far sea,obtaining richer geomagnetic field information.
关键词
海洋地磁测量/矢量场/磁通门传感器/测量系统/海上试验
Key words
marine magnetic survey/vector field/Fluxgate sensor/measurement system/sea trial
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