def bradley_paper_polarized_beams(cstfile):
# This only works on files like /Users/jaguirre/Documents/PAPER/2010_beam/sdipole_05e_eg_ffx_150.txt
data = np.loadtxt(cstfile,skiprows=2)
theta = np.radians(data[:,0])
phi = np.radians(data[:,1])
# Pixellize in linear space
dbi = dbi2pknorm(data[:,2])
dbi_t = dbi2pknorm(data[:,3])
dbi_p = dbi2pknorm(data[:,4])
nside=32
npix = hp.nside2npix(nside)
xx = hpt.healpixellize(dbi,theta,phi,nside)
# These are the power beams for each basis vector
xt = np.sqrt(hpt.healpixellize(dbi_t,theta,phi,nside))
xp = np.sqrt(hpt.healpixellize(dbi_p,theta,phi,nside))
yy = hpt.rotate_healpix_map(xx.copy(),[90,0]) # This is a simple rotation, surely
yt = hpt.rotate_healpix_map(xt.copy(),[90,0])
yp = hpt.rotate_healpix_map(xp.copy(),[90,0])
return {'xx':xx,'yy':yy,'xt':xt,'xp':xp,'yt':yt,'yp':yp}#'data':data}
import healpy as hp import polarized_beams as pb reload(pb) import healpyTools as hpt # Get the PAPER beams from Rich, which only amplitude info bradley_paper_file = '/Users/jaguirre/Documents/PAPER/2010_beam/sdipole_05e_eg_ffx_150.txt' # Get the HERA beams from Rich, which are truly complex bradley_hera_file = '/Users/jaguirre/PyModules/hera-cst/mdl01/HERA_DISH_paper_feed_cyl36_150mhz' hera_rich = pb.bradley_hera_polarized_beams(bradley_hera_file) paper_rich = pb.bradley_paper_polarized_beams(bradley_paper_file) pbxx = paper_rich['xx'] pbxx = hpt.rotate_healpix_map(pbxx,[0,-120]) #hp.mollview(pbxx) #hp.mollview(hpt.rotate_healpix_map(pbxx,[0,-120])) #hp.graticule() #plt.show() npix = pbxx.size nside = hp.npix2nside(npix) lmax = 3*nside-1 alm_pbxx = hp.map2alm(pbxx,lmax=lmax) cl_pbxx = hp.alm2cl(alm_pbxx) l,m= hp.Alm.getlm(lmax) rot = np.exp(-1j*np.radians(45.)*m)
pb.plot_leakage_beams(l_paper_rich,rot=[0,90],mn=-2,mx=0,log=True,figno=1)
# The sqrt of xx times the ideal dipole response isn't a bad
# approximation for either theta or phi (few percent difference)
# But crucially, the ideal dipole is *not* positive definite
pxy = pb.xy_ideal_dipole()
pdxt = np.sqrt(paper_rich['xx'])*pxy['xt']
pdxp = np.sqrt(paper_rich['xx'])*pxy['xp']
pdyt = np.sqrt(paper_rich['yy'])*pxy['yt']
pdyp = np.sqrt(paper_rich['yy'])*pxy['yp']
l_paper_ideal = pb.visibility_leakage_beams(pdxt,pdxp,pdyt,pdyp)
pb.plot_leakage_beams(l_paper_ideal,rot=[0,90],mn=-2,mx=0,log=True,figno=2)
# Let's try same thing, but at the equator
pzy = pb.zy_ideal_dipole()
pdxt_zy = hpt.rotate_healpix_map(np.sqrt(paper_rich['xx']),[0,-90])*pzy['xt']
pdxp_zy = hpt.rotate_healpix_map(np.sqrt(paper_rich['xx']),[0,-90])*pzy['xp']
pdyt_zy = hpt.rotate_healpix_map(np.sqrt(paper_rich['yy']),[0,-90])*pzy['yt']
pdyp_zy = hpt.rotate_healpix_map(np.sqrt(paper_rich['yy']),[0,-90])*pzy['yp']
l_paper_ideal_zy = pb.visibility_leakage_beams(pdxt_zy,pdxp_zy,pdyt_zy,pdyp_zy)
pb.plot_efield_beams(pdxt_zy,pdxp_zy,pdyt_zy,pdyp_zy,figno=3)
pb.plot_leakage_beams(l_paper_ideal_zy,rot=[0,0],mn=-0.05,mx=0.05,log=False,figno=4)
plt.savefig('paper_leakage_beams_best.png')
# Let's see the V leakage not vanish - yeah!
l_hera_rich = pb.visibility_leakage_beams(hera_rich['xt'],hera_rich['xp'],hera_rich['yt'],hera_rich['yp'])
pb.plot_leakage_beams(l_hera_rich,rot=[0,90],mn=-3,mx=0,log=True,figno=5)
# And now let's make up the (zero phase) HERA beams at the equator
hdxt_zy = hpt.rotate_healpix_map(np.sqrt(hera_rich['xx']),[0,-90])*pzy['xt']
hdxp_zy = hpt.rotate_healpix_map(np.sqrt(hera_rich['xx']),[0,-90])*pzy['xp']