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The Pearson correlation coefficients among the three sensors calculated from Figure 5.
| PCC | Magnetometer | 1st-Order Gradiometer | 2nd-Order Gradiometer |
|---|---|---|---|
| Magnetometer | 1 | 0.91624 | 0.97076 |
| 1st-Order Gradiometer | 0.91624 | 1 | 0.89323 |
| 2nd-Order Gradiometer | 0.97076 | 0.89323 | 1 |
