Verification of the geomagnetic field models using historical satellite measurements obtained in 1964 and 1970

Earth, Planets and Space

Table 4 Comparison of SV (Z) predictions based on IGRF, M-1,2 and N-1,2 models with observatory data. All values are given in nT/year

Obs, SV		IGRF		M-1,2		N-1,2
Obs, SV		SV	ΔSV	SV	ΔSV	SV	ΔSV
MMB	− 23.40	− 28.53	5.13	− 55.54	32.14	− 25.89	2.49
TKT	− 22.85	− 25.76	2.91	1.31	24.16	− 17.96	4.89
CLF	14.25	17.84	3.59	− 26.83	41.08	14.77	0.52
FRD	− 60.42	− 67.54	7.12	− 14.96	45.46	− 48.04	12.38
VIC	− 20.39	− 23.62	3.23	− 56.96	36.57	− 14.09	6.3
GNA	5.19	− 2.39	7.58	− 64.63	69.82	4.22	0.97
PAF	13.69	4.09	9.60	26.94	13.25	16.72	3.03
HER	95.07	85.40	9.67	44.34	50.73	122.33	27.26
PIL	1.42	− 4.99	6.41	210.70	209.28	13.30	11.88