Table 2 Choice of regularization parameters in CHAOS-7
From: The CHAOS-7 geomagnetic field model and observed changes in the South Atlantic Anomaly
Regularization parameter | Value |
|---|---|
\(\lambda _{i3} (n_{\text{low}},m > 0)\) | 1 (nT \(\hbox {days}^{-3})^{-2}\) |
\(\lambda _{i3} (n_{\text{low}},m=0)\) | 10 (nT \(\hbox {days}^{-3})^{-2}\) |
\(\lambda _{i3}(n_{\text{high}}, m > 0)\) | 0.005 (nT \(\hbox {days}^{-3})^{-2}\) |
\(\lambda _{i3}(n_{\text{high}}, m = 0)\) | 0.05 (nT \(\hbox {days}^{-3})^{-2}\) |
\(\lambda _{i2e}\) | 100 (nT \(\hbox {days}^{-2})^{-2}\) |
\(\lambda _{\text{sm}}\) | 900 000 (nT \(\hbox {days}^{-1})^{-2}\) |
\(\lambda _{\text{cs}}\) | 441 ((eu/nT) \(\hbox {days}^{-1})^{-2}\) |
\(\lambda _{\text{cu}}\) | 4410 (arcsec \(\hbox {days}^{-1})^{-2}\) |
\(\lambda _{\text{cb}}\) | 4.41 (eu \(\hbox {days}^{-1})^{-2}\) |