Table 1. Correction matrix and inter-axis angles of the FGM

Parameter	FGM Center	FGM -Y	FGM +Y
A [nT/V]	[ −37,374.091,111.15−240.52−469.2841,090.521,101.71−304.2391.2537,797.42 ]	[ −37,054.66891−158.4550.6440,829.1912.79110.49188.35−37,865.37 ]	[ −41,251.321,364.30−231.92−181.7338,014.02−82.58−326.49−62.4837,958.65 ]
αx [°]	178.40	178.73	177.92
βx [°]	88.45	88.75	87.95
γx [°]	90.41	89.76	90.35
αy [°]	90.71	89.92	90.25
βy [°]	1.82	0.08	0.28
γy [°]	91.67	89.98	89.88
αz [°]	90.47	90.17	90.45
βz [°]	90.12	89.73	89.89
γz [°]	0.48	179.68	0.47
θxy [°]	87.73	88.83	87.69
θxz [°]	89.95	90.07	89.89
θyz [°]	91.78	89.75	89.76

FGM, fluxgate magnetometer.