API Reference

Main functions

grasp2alm.grasp2alm(filepath, nside[, ...])	Convert a GRASP file to a spherical harmonic coefficients of beam map.
grasp2alm.grasp2alm_lsq(filepath, nside, ...)	Convert a GRASP file to a spherical harmonic coefficients of beam map by using healpy.map2alm_lsq.

Classes

grasp2alm.BeamCut(filepath)	Class to hold the data from a beam cut file of GRASP.
grasp2alm.BeamGrid(filepath)	Class to hold the data from a beam grid file of GRASP.
grasp2alm.BeamPolar(nphi, ntheta, ...)	Represents beams of Stokes parameters.
grasp2alm.BeamMap(map)	Represents a beam map.
grasp2alm.BeamGauss(fwhm_deg[, amplitude])	Class to generate a gaussian beam.

Methods

grasp2alm.BeamCut.to_polar([copol_axis])	Converts beam in "cut" format to Stokes parameters on a polar grid.
grasp2alm.BeamCut.plot([pol, color_resol, ...])	Plot the beam pattern.
grasp2alm.BeamGrid.to_polar([copol_axis])	Converts beam in polar grid format into Stokes parameters on a polar grid.
grasp2alm.BeamGrid.plot([pol, color_resol, ...])	Plot the beam pattern.
grasp2alm.BeamPolar.stokes_rotate()	Rotates \(Q\) and \(U\) Stokes parameters from the co-cross basis to the polar basis.
grasp2alm.BeamPolar.to_map(nside[, nstokes, ...])	Convert the BeamPolar to a BeamMap.
grasp2alm.BeamPolar.plot([stokes, ...])	Plot the beam profile.
grasp2alm.BeamMap.to_alm([lmax, mmax, iter, ...])	Converts the beam map to spherical harmonic coefficients.
grasp2alm.BeamMap.to_alm_lsq(lmax, mmax[, ...])	Converts the beam map to spherical harmonic coefficients by using healpy.map2alm_lsq().
grasp2alm.BeamGauss.gaussian_beam(theta)	Calculates the value of a Gaussian beam at a given angle.
grasp2alm.BeamGauss.get_alm(lmax, mmax[, ...])	Return an array of spherical harmonics \(a_{\ell m}\) that represents a Gaussian beam
grasp2alm.BeamGauss.get_profile(nside)	Provide the beam map profile at a given nside.