healpy.rotator.Rotator.rotate_map_alms¶
-
Rotator.
rotate_map_alms
(self, m, use_pixel_weights=True, lmax=None, mmax=None)¶ Rotate a HEALPix map to a new reference frame in spherical harmonics space
This is generally the best strategy to rotate/change reference frame of maps. If the input map is band-limited, i.e. it can be represented exactly by a spherical harmonics transform under a specific lmax, the map rotation will be invertible.
- Parameters
- mnp.ndarray
Input map, 1 map is considered I, 2 maps:[Q,U], 3 maps:[I,Q,U]
- use_pixel_weightsbool, optional
Use pixel weights in map2alm
- Returns
- m_rotatednp.ndarray
Map in the new reference frame