The easiest and cheapest way to get the magnetic field of a vessel is to measure the vertical component of the field while the vessel moves over an array of vertical magnetic sensors located in a horizontal line (perpendicular to the bow-stem direction)at a particular depth. In order to obtain the vectorial field of the vessel (three-component field) , the method have used mathematical technique based on the potential theory,applying it to the data of the vertical field. The technique is easy to be implemented as a software in micro-computer. It has the advantage of producing exact results (it is not a mathematical modeling) in few seconds of processing,and of saving money and avoiding efforts,since it processes the data that can be measured by a small number of magnetometers and produces data of an infinite number of them 10-cated everywhere oriented in any spatial direction.%获得舰船磁场的最简单、经济的方法是,当舰船通过其下方某一深度(正交于舰首方向)的垂向磁传感器阵列平面的时候,测量舰船垂向磁场分量.采用数学方法处理垂向磁场数据,推算出舰船的矢量磁场(3个方向的磁场).该方法非常容易在计算机上实现,它具有在数秒内获得精确结果的优点,并且既省钱又省力.同时仅需要少量磁传感器,便能得到任何方向的磁场.
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