Table 1 Selection criteria, and model corrections applied for the GVO and SOLA datasets used in this study
From: Applications for CryoSat-2 satellite magnetic data in studies of Earth’s core field variations
Data set # 1 | Data set # 2 | |
|---|---|---|
Used in | GVO application | SOLA application |
Satellite | CHAMP, CryoSat-2, Swarm | Ørsted, CHAMP, CryoSat-2, Swarm |
Data type | Vector data sums and differences | Radial component of vector data |
Subsampling | 15 s (16 s CryoSat-2) | 5 s (4 s CryoSat-2) |
Kp | \(<3^o\) | \(<2^o\) |
\(\vert dRC/dt\vert\) | \(<3\,\hbox {nT}/\hbox {h}\) | \(<2\,\hbox {nT}/\hbox {h}\) |
Em | \(\le 0.8\,\hbox {mV}/\hbox {m}\) | \(\le 0.8\,\hbox {mV}/\hbox {m}\) |
IMF \(B_Z\) | \(>0\) nT | \(>0\) nT |
IMF \(\vert B_Y \vert\) | \(<10\) nT | \(<6\) nT |
Solar angle | \(<-10^{\circ }\) | \(<-10^{\circ }\) |
Outliers removed | \(<500\) nT from CHAOS | \(<500\) nT from CHAOS |
LCS-1 | Lithospheric field for \(n \in [14,120]\) subtracted | |
CHAOS-7.2 | Magnetospheric (plus induced) fields subtracted | |
CIY4 | Ionospheric (plus induced) fields subtracted | |