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Equilibrium Calculation
1) Treat the CDC as a dipole magnetic field
2) Trace the cusp field line from minimum |B| point.
3) Place a dipole antiparallel on the cusp field line, and calculate the vector sum: BT= a Bd + Bt96
4) Integrate |BT2| over some volume (sphere=2 Re)
5) Numerically evaluate d/dx( |BT2|), d/dy & d/dz
6) Repeat steps 3-5 for many values of a
7) Find the value of a for which the derivative=0
8) Change radius and repeat steps 3-7.
9) Change T96 parameters (Dst,Vsw,Bz) & repeat