Table 1 Performance of the degree 360 Slepian joint satellite and near-surface magnetic anomaly model (S360)

CHAMP satellite vector components

 B _r

25.66; −19.23

(25.66; −17.51)

0.45

(1.56)

5.26

(5.96)

24.31; −20.74

(24.31; −18.74)

0.39

(1.44)

5.04

(5.77)

0.95

(0.98)

1.57

(1.28)

 B _θ

23.03; −16.83

(12.98; −9.84)

0.79

(0.57)

4.31

(4.69)

22.18; −17.60

(16.89; −17.60)

0.17

(−0.17)

3.96

(4.41)

0.91

(0.94)

1.88

(1.77)

 B _φ

12.98; −11.25

(12.98; −9.84)

0.23

(0.26)

3.37

(3.67)

11.29; −9.86

(10.97; −8.75)

0.12

(0.14)

2.99

(3.38)

0.90

(0.92)

1.47

(1.41)

Near-surface total intensities

 ΔT

749.8; −509.2

(749.8; −509.2)

−2.55

(7.82)

102.9

(116.1)

832.4; −455.0

(832.4; −455.0)

−1.99

(3.93)

95.8

(113.6)

0.93

(0.97)

38.1

(28.5)