Table 3 Residual statistics (unweighted) for Model A
From: Co-estimation of geomagnetic field and in-orbit fluxgate magnetometer calibration parameters
Dataset | Component | N | mean (nT) | \(\sigma\) (nT) | rms (nT) |
|---|---|---|---|---|---|
CHAMP | \(B_r\) | 219 794 | 0.09 | 2.13 | 2.13 |
\(B_{\theta }\) | 219 794 | 0.25 | 3.56 | 3.57 | |
\(B_{\phi }\) | 219 794 | − 0.11 | 3.02 | 3.02 | |
\(F_{\text {nonpolar}}\) | 233 951 | − 0.09 | 2.42 | 2.42 | |
\(F_{\text {polar}}\) | 238 742 | 1.15 | 13.05 | 13.10 | |
Swarm A | \(B_r\) | 130 482 | − 0.04 | 1.77 | 1.77 |
\(B_{\theta }\) | 130 482 | 0.24 | 4.15 | 4.16 | |
\(B_{\phi }\) | 130 482 | − 0.09 | 3.02 | 3.02 | |
\(F_{\text {nonpolar}}\) | 130 501 | − 0.46 | 2.82 | 2.86 | |
\(F_{\text {polar}}\) | 147 576 | 0.89 | 11.05 | 11.08 | |
Swarm B | \(B_r\) | 142 447 | − 0.12 | 2.43 | 2.43 |
\(B_{\theta }\) | 142 447 | − 0.71 | 4.77 | 4.82 | |
\(B_{\phi }\) | 142 447 | 0.05 | 3.04 | 3.04 | |
\(F_{\text {nonpolar}}\) | 142 546 | 0.06 | 3.18 | 3.18 | |
\(F_{\text {polar}}\) | 151 356 | 1.11 | 9.95 | 10.01 | |
Cryosat FGM1 | \(B_r\) | 116 222 | − 0.06 | 5.06 | 5.06 |
\(B_{\theta }\) | 116 222 | − 0.15 | 6.83 | 6.83 | |
\(B_{\phi }\) | 116 222 | − 0.05 | 4.95 | 4.95 | |
\(F_{\text {nonpolar}}\) | 116 222 | 0.76 | 5.33 | 5.39 | |
\(F_{\text {polar}}\) | 87 369 | 0.88 | 8.88 | 8.92 | |
Cryosat FGM2 | \(B_r\) | 116 354 | 0.05 | 6.88 | 6.88 |
\(B_{\theta }\) | 116 354 | 0.05 | 6.61 | 6.61 | |
\(B_{\phi }\) | 116 354 | − 0.03 | 5.00 | 5.00 | |
\(F_{\text {nonpolar}}\) | 116 354 | 1.24 | 5.62 | 5.76 | |
\(F_{\text {polar}}\) | 87 252 | − 0.60 | 8.97 | 8.99 | |
Cryosat FGM3 | \(B_r\) | 116 206 | 0.05 | 5.18 | 5.18 |
\(B_{\theta }\) | 116 206 | 0.00 | 6.28 | 6.28 | |
\(B_{\phi }\) | 116 206 | − 0.08 | 5.38 | 5.38 | |
\(F_{\text {nonpolar}}\) | 116 206 | 1.33 | 5.06 | 5.23 | |
\(F_{\text {polar}}\) | 87 107 | 1.01 | 9.02 | 9.08 | |
DMSP F-16 | \(B_r\) | 506 292 | 0.20 | 18.09 | 18.09 |
\(B_{\theta }\) | 506 292 | − 1.07 | 26.28 | 26.30 | |
\(B_{\phi }\) | 506 292 | − 0.18 | 24.24 | 24.24 | |
\(F_{\text {nonpolar}}\) | 506 292 | 0.47 | 11.62 | 11.63 | |
\(F_{\text {polar}}\) | 103 100 | 6.20 | 20.15 | 21.08 | |
DMSP F-17 | \(B_r\) | 509 820 | 0.20 | 9.52 | 9.53 |
\(B_{\theta }\) | 509 820 | − 0.44 | 11.39 | 11.40 | |
\(B_{\phi }\) | 509 820 | 0.03 | 8.93 | 8.93 | |
\(F_{\text {nonpolar}}\) | 509 820 | 0.34 | 7.88 | 7.89 | |
\(F_{\text {polar}}\) | 104 601 | − 6.55 | 16.32 | 17.58 | |
DMSP F-18 | \(B_r\) | 427 126 | − 0.12 | 24.62 | 24.62 |
\(B_{\theta }\) | 427 126 | − 0.22 | 12.42 | 12.43 | |
\(B_{\phi }\) | 427 126 | 0.05 | 9.29 | 9.29 | |
\(F_{\text {nonpolar}}\) | 427 126 | − 0.13 | 8.95 | 8.96 | |
\(F_{\text {polar}}\) | 85 318 | − 6.84 | 19.96 | 21.10 |
Dataset | Component | N | mean (nT/year) | \(\sigma\) (nT/year) | rms (nT/year) |
|---|---|---|---|---|---|
Observatories | \({\dot{B}}_{r,\text {nonpolar}}\) | 415 003 | 0.33 | 5.89 | 5.90 |
\({\dot{B}}_{\theta ,\text {nonpolar}}\) | 415 003 | −0.31 | 7.80 | 7.80 | |
\({\dot{B}}_{\phi ,\text {nonpolar}}\) | 413 869 | 0.00 | 7.31 | 7.31 | |
\({\dot{B}}_{r,\text {polar}}\) | 181 023 | 0.23 | 29.06 | 29.06 | |
\({\dot{B}}_{\theta ,\text {polar}}\) | 181 023 | 0.07 | 26.93 | 26.93 | |
\({\dot{B}}_{\phi ,\text {polar}}\) | 181 023 | −0.01 | 18.32 | 18.32 |