@frame_transform_graph.transform(coord.StaticMatrixTransform, Sagittarius, coord.Galactic)
def sgr_to_galactic():
 return matrix_transpose(SGR_MATRIX)

@ frame_transform_graph . transform ( coord . StaticMatrixTransform , Sagittarius , coord . Galactic ) def sgr_to_galactic ( ) : return matrix_transpose ( SGR_MATRIX )
compute the transformation matrix from heliocentric sgr coordinates to spherical galactic .