Improving Earth’s Magnetic Field Measurements by Numerical Corrections of Thermal Drifts and Man-Made Disturbances

Figure 2

(a) The triaxial sensor head (1) at PLM station is placed in an unheated hut made of PVC (3) and is surrounded by nonmagnetic white bricks to increase the thermal mass. The hut is painted with special sun-reflecting paint. (b) The sensor at KEL variation station is located 6 m underground.

(a)

(b)