斯特芬•茅斯：科学家们采用非常灵敏的磁力计来测量地磁场的方向、强度及方位。
Stefan Maus: They're equipped with very sensitive magnetometers that measure the direction and strength of the magnetic field and that altitude.
偶极，四极。方位角对称。静磁，带电量守恒及磁力。
Dipoles, Quadrupoles. Azimuthal Symmetry. Magnetostatics, Charge Conservation and Magnetic Force.
下井仪器的方位由一个三轴加速度计和三个磁力计测量。
The tool orientation is made by a triaxial accelerometer and three magnetometers.
下井仪器的方位由一个三轴加速度计和三个磁力计测量。
The tool orientation is made by a triaxial accelerometer and three magnetometers.
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