bfieldtools.sphtools.basis_fields

bfieldtools.sphtools.basis_fields(p, lmax, normalization='default', R=1)

Computes magnetic field of each sph coefficient. Ignores the ‘DC’ component l=0.

Parameters

p: Nx3 array

coordinates in which the field is computed

lmax: int

maximum degree l used in the computation

normalization: string

“default”: the fields correspond to magnetic normalized potential. “unit”: the fields are normalized w.r.t integration over the unit sphere. “energy”: each term in inner/outer basis function with respect to

sphere with radius R is normalized to unit energy

R: float

Sphere radius that separates inner/outer components

Returns

B1: N x 3 x N_lmax array

magnetic field at p for each alpha_lm

B2: N x 3 x N_lmax array

magnetic field at p for each beta_lm