sphtfunc – Spherical harmonic transforms

From map to spherical harmonics

anafast(map1[, map2, nspec, lmax, mmax, ...])	Computes the power spectrum of a Healpix map, or the cross-spectrum between two maps if map2 is given.
map2alm(maps[, lmax, mmax, iter, pol, ...])	Computes the alm of a Healpix map.
map2alm_spin(maps, spin[, lmax, mmax])	Computes the spinned alm of a 2 Healpix maps.
map2alm_lsq(maps, lmax, mmax[, pol, tol, ...])	Runs an iterative map analysis up to (lmax, mmax) and returns the result including its quality.

From spherical harmonics to map

synfast(cls, nside[, lmax, mmax, alm, pol, ...])	Create a map(s) from cl(s).
alm2map(alms, nside[, lmax, mmax, pixwin, ...])	Computes a Healpix map given the alm.
alm2map_der1(alm, nside[, lmax, mmax])	Computes a Healpix map and its first derivatives given the alm.
alm2map_spin(alms, nside, spin, lmax[, mmax])	Computes maps from a set of 2 spinned alm

Spherical harmonic transform tools

smoothing(map_in[, fwhm, sigma, ...])	Smooth a map with a Gaussian symmetric beam.
smoothalm(alms[, fwhm, sigma, beam_window, ...])	Smooth alm with a Gaussian symmetric beam function.
alm2cl(alms1[, alms2, lmax, mmax, lmax_out, ...])	Computes (cross-)spectra from alm(s).
synalm(cls[, lmax, mmax, new, verbose])	Generate a set of alm given cl.
almxfl(alm, fl[, mmax, inplace])	Multiply alm by a function of l.
pixwin(nside[, pol, lmax])	Return the pixel window function for the given nside.
Alm()	This class provides some static methods for alm index computation.
resize_alm(alm, lmax, mmax, lmax_out, mmax_out)	Returns a resized copy of the input a_lm, either truncated or padded with zeros.

Other tools

gauss_beam(fwhm[, lmax, pol])	Gaussian beam window function
beam2bl(beam, theta, lmax)	Computes a transfer (or window) function b(l) in spherical harmonic space from its circular beam profile b(theta) in real space.
bl2beam(bl, theta)	Computes a circular beam profile b(theta) in real space from its transfer (or window) function b(l) in spherical harmonic space.