matvis.coordinates.spherical_basis_vector_rotation_matrix

matvis.coordinates.spherical_basis_vector_rotation_matrix(theta, phi, rotation_matrix, beta, alpha)

Get the rotation matrix for vectors in theta/phi basis to a new reference frame.

Parameters:

• theta (array_like) – Colatitude and longitude in the original frame.

• phi (array_like) – Colatitude and longitude in the original frame.

• rotation_matrix (ndarray, shape (3,3,...)) – Bulk 3D rotation carrying original frame → new frame.

• beta (array_like) – Colatitude and longitude in the new (rotated) frame.

• alpha (array_like) – Colatitude and longitude in the new (rotated) frame.

Returns:

bmat –

2×2 rotation matrices in the spherical basis:

[[ cos X, sin X], [-sin X, cos X]],

where X is the angle between the two basis sets.

Return type:

ndarray, shape (2,2,…)