Skip to main content

Table 3 Parameters of the correlation functions \(C_2(\tau )\) and \(C_2(\tau )+C_1(\tau )\) fitted to \(C_{q_{1d}^0}(\tau )\)

From: COV-OBS.x2: 180 years of geomagnetic field evolution from ground-based and satellite observations

Parameter

\(\sigma _2^2\) (nT\(^2\))

\(1/\alpha _2\) (year)

\(2\pi /\beta _2\) (year)

\(\sigma _1^2\) (nT\(^2\))

\(1/\alpha _1\) (year)

\(\chi _C\) (nT\(^2\))

\(C_2\)

\(23.3 \pm 1.2\)

\(41 \pm 4\)

\(10.51 \pm 0.03\)

4.93

\(C_2 + C_1\)

\(19.6 \pm 0.8\)

\(56 \pm 5\)

\(10.51 \pm 0.02\)

\(16.7 \pm 1.3\)

\(5.9 \pm 0.7\)

3.08