| Coefficients |
| Value | Unit of measurement |
| a00 | = | 45,386.500 | nT |
| a10 | = | 342.120 | nT |
| a01 | = | 69.034 | nT |
| a20 | = | −4.438 | nT |
| a02 | = | 1.457 | nT |
| a11 | = | −1.867 | nT |