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Earth, Planets and Space

Table 2 Mean and root mean square misfits between parent model estimate and input data

From: The BGS magnetic field candidate models for the 12th generation IGRF

  

Mean (nT)

 

Root mean square (nT)

 

Source

Number of data

X

Y

Z

F

X

Y

Z

F

CHAMP

1,332,591

0.10

−0.19

0.05

-

25.20

27.64

12.25

-

Swarm A

455,091

−0.10

−0.10

0.44

-

34.34

40.15

13.23

-

Swarm B

426,324

−0.45

−0.09

0.17

-

35.06

40.55

12.73

-

Swarm C

407,166

−0.26

−0.18

−0.21

-

34.92

40.49

13.18

-

Observatories

290,532

0.04

−0.00

0.01

-

3.90

3.26

3.24

-

Ørsted

281,967

-

-

-

0.75

-

-

-

7.65

CHAMP

20,740

-

-

-

−2.36

-

-

-

10.34

Swarm A

749

-

-

-

−4.42

-

-

-

14.41

Swarm B

2,544

-

-

-

−4.96

-

-

-

18.07

Swarm C

1,196

-

-

-

−2.91

-

-

-

14.64

Observatories

63,830

-

-

-

−0.07

-

-

-

18.89

  1. Satellite F misfits are calculated with respect to scalar input data. Observatory F misfits are at high geomagnetic dipole latitude and are calculated with respect to vector data projected onto an a priori model. All observatory vector misfits are at mid and low geomagnetic dipole latitudes. Mid and low latitudes are defined as being between ±50°, with high latitudes outside this range. The number of data quoted counts each component separately.
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