Transforming geographic to geomagnetic coordinates
Figure B1 shows the geographic and geomagnetic coordinate systems. The position vector, r_{m}, in the
geomagnetic coordinate system is related to the position vector, r_{g}, in the geographic coordinate system
by a transformation:
The transformation describes a latitudinal plus a longitudinal rotation: A rotation of the
coordinate axes by an angle, , from the geographic
pole along the Greenwich meridian (0
We express the Cartesian components (x, y, z) of the general position vector, r, in terms of spherical polar coordinates
Substituting equation (B.2) for and equation (B.3) for r
and
For example, using = 11.5 |

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