根据“地震及前兆数字观测技术规范”电磁部分的要求，在地磁台站建筑施工过程中，需用质子旋进磁力仪在现场对建筑物及周围磁场背景进行监测。
According to the require of the technique criterion, in the building process of geomagnetic station, it have to use rotation magnetometer to monitor the background of structure and site.
使用高灵敏度的G856、dtz2型核子旋进式磁力仪，对乌鲁木齐地磁台199个测点的磁场梯度进行了复测。
The magnetic field gradient is surveyed again at 199 sites in Urumqi geomagnetic station using high sensitivity nuclear procession magnetometers of Type G856 and DTZ 2.
利用物理摆原理导出了自动安平水准仪磁致误差的理论函数模型，建立了地磁场中的观测方程。
Based on the theory of horizontal pendulum, the theoretical function model of magnetic error of self adjusting level is deriveted, and observation equation in geomagnetic field is set up.
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