def test_cmb_map_bandpass():
nside = 32
# pretend for testing that the Dust is CMB
model = pysm3.CMBMap(map_IQU="pysm_2/lensed_cmb.fits", nside=nside)
freq = 100 * u.GHz
expected_map = pysm3.read_map(
"pysm_2/lensed_cmb.fits", field=0, nside=nside, unit=u.uK_CMB
).to(u.uK_RJ, equivalencies=u.cmb_equivalencies(freq))
print(
"expected_scaling",
(1 * u.K_CMB).to_value(u.K_RJ, equivalencies=u.cmb_equivalencies(freq)),
)
freqs = np.array([98, 99, 100, 101, 102]) * u.GHz
weights = np.ones(len(freqs))
# just checking that the result is reasonably close
# to the delta frequency at the center frequency
assert_quantity_allclose(
expected_map, model.get_emission(freqs, weights)[0], rtol=1e-3
)
def test_cmb_map():
nside = 32
# pretend for testing that the Dust is CMB
model = pysm3.CMBMap(map_IQU="pysm_2/lensed_cmb.fits", nside=nside)
freq = 100 * u.GHz
expected_map = pysm3.read_map(
"pysm_2/lensed_cmb.fits", field=(0, 1), nside=nside, unit=u.uK_CMB
).to(u.uK_RJ, equivalencies=u.cmb_equivalencies(freq))
simulated_map = model.get_emission(freq)
for pol in [0, 1]:
assert_quantity_allclose(expected_map[pol], simulated_map[pol], rtol=1e-5)
def get_sky(self, coverage):
setting = []
iscmb = False
for k in self.skyconfig:
if k == 'cmb':
iscmb = True
maps = self.get_cmb(coverage)
rndstr = random_string(10)
hp.write_map('/tmp/' + rndstr, maps)
cmbmap = pysm3.CMBMap(self.nside, map_IQU='/tmp/' + rndstr)
os.remove('/tmp/' + rndstr)
#setting.append(skyconfig[k])
elif k == 'dust':
pass
else:
setting.append(self.skyconfig[k])
sky = pysm3.Sky(nside=self.nside, preset_strings=setting)
if iscmb:
sky.add_component(cmbmap)
return sky
def make_cmb_sims(params):
""" Write cmb maps on disk
Parameters
----------
params: module contating all the simulation parameters
"""
nmc_cmb = params.nmc_cmb
nside = params.nside
smooth = params.gaussian_smooth
ch_name = [
'SO_SAT_27', 'SO_SAT_39', 'SO_SAT_93', 'SO_SAT_145', 'SO_SAT_225',
'SO_SAT_280'
]
freqs = sonc.Simons_Observatory_V3_SA_bands()
beams = sonc.Simons_Observatory_V3_SA_beams()
band_int = params.band_int
parallel = params.parallel
root_dir = params.out_dir
out_dir = f'{root_dir}/cmb/'
file_str = params.file_string
seed_cmb = params.seed_cmb
cmb_ps_file = params.cmb_ps_file
rank = 0
size = 1
if params.parallel:
from mpi4py import MPI
comm = MPI.COMM_WORLD
rank = comm.Get_rank()
size = comm.Get_size()
if not os.path.exists(out_dir) and rank == 0:
os.makedirs(out_dir)
if cmb_ps_file:
print(cmb_ps_file)
cl_cmb = hp.read_cl(cmb_ps_file)
else:
cmb_ps_scalar_file = os.path.join(os.path.dirname(__file__),
'datautils/Cls_Planck2018_r0.fits')
cl_cmb_scalar = hp.read_cl(cmb_ps_scalar_file)
cmb_ps_tensor_r1_file = os.path.join(
os.path.dirname(__file__),
'datautils/Cls_Planck2018_tensor_r1.fits')
cmb_r = params.cmb_r
cl_cmb_tensor = hp.read_cl(cmb_ps_tensor_r1_file) * cmb_r
cl_cmb = cl_cmb_scalar + cl_cmb_tensor
nmc_cmb = math.ceil(nmc_cmb / size) * size
if nmc_cmb != params.nmc_cmb:
print_rnk0(f'WARNING: setting nmc_cmb = {nmc_cmb}', rank)
perrank = nmc_cmb // size
for nmc in range(rank * perrank, (rank + 1) * perrank):
if seed_cmb:
np.random.seed(seed_cmb + nmc)
nmc_str = str(nmc).zfill(4)
if not os.path.exists(out_dir + nmc_str):
os.makedirs(out_dir + nmc_str)
cmb_temp = hp.synfast(cl_cmb, nside, new=True, verbose=False)
file_name = f'cmb_{nmc_str}_{file_str}.fits'
file_tot_path = f'{out_dir}{nmc_str}/{file_name}'
hp.write_map(file_tot_path, cmb_temp, overwrite=True, dtype=np.float32)
os.environ["PYSM_LOCAL_DATA"] = f'{out_dir}'
sky = pysm3.Sky(nside=nside,
component_objects=[
pysm3.CMBMap(nside,
map_IQU=f'{nmc_str}/{file_name}')
])
for nch, chnl in enumerate(ch_name):
freq = freqs[nch]
fwhm = beams[nch]
cmb_map = sky.get_emission(freq * u.GHz)
cmb_map = cmb_map.to(u.uK_CMB,
equivalencies=u.cmb_equivalencies(freq *
u.GHz))
if smooth:
cmb_map_smt = hp.smoothing(cmb_map,
fwhm=np.radians(fwhm / 60.),
verbose=False)
else:
cmb_map_smt = cmb_map
file_name = f'{chnl}_cmb_{nmc_str}_{file_str}.fits'
file_tot_path = f'{out_dir}{nmc_str}/{file_name}'
hp.write_map(file_tot_path,
cmb_map_smt,
overwrite=True,
dtype=np.float32)
def __init__(self, skyconfig, d, instrument, out_dir, out_prefix, lmax=None):
"""
Parameters:
skyconfig : a skyconfig dictionary to pass to (as expected by) `PySM`
d : input dictionary, from which the following Parameters are read
instrument : a `PySM` instrument describing the instrument
out_dir : default path where the sky maps will be saved
out_prefix : default word for the output files
For more details about `PySM` see the `PySM` documentation at the floowing link:
https://pysm-public.readthedocs.io/en/latest/index.html
"""
self.skyconfig = skyconfig
self.nside = d['nside']
self.npix = 12 * self.nside ** 2
self.dictionary = d
self.Nfin = int(self.dictionary['nf_sub'])
self.Nfout = int(self.dictionary['nf_recon'])
self.filter_nu = int(self.dictionary['filter_nu'] / 1e9)
self.filter_relative_bandwidth = self.dictionary['filter_relative_bandwidth']
self.instrument = instrument
self.output_directory = out_dir
self.output_prefix = out_prefix
self.input_cmb_maps = None
self.input_cmb_spectra = None
if lmax is None:
self.lmax = 3 * d['nside']
else:
self.lmax = lmax
iscmb = False
preset_strings = []
for k in skyconfig.keys():
if k == 'cmb':
iscmb = True
keyword = skyconfig[k]
if isinstance(keyword, dict):
# the CMB part is defined via a dictionary
# This can be either a set of maps, a set of CAMB spectra, or whatever
# In the second case it might also contain the seed (None means rerun it each time)
# In the third case we recompute some CAMB spectra and generate the maps
keys = keyword.keys()
if 'IQUMaps' in keys:
# this is the case where we have IQU maps
mymaps = keyword['IQUMaps']
self.input_cmb_maps = mymaps
self.input_cmb_spectra = None
elif 'CAMBSpectra' in keys:
# this is the case where we have CAMB Spectra
# Note that they are in l(l+1) CL/2pi so we have to change that for synfast
totDL = keyword['CAMBSpectra']
ell = keyword['ell']
mycls = qc.Dl2Cl_without_monopole(ell, totDL)
# set the seed if needed
if 'seed' in keys:
np.random.seed(keyword['seed'])
mymaps = hp.synfast(mycls.T, self.nside, verbose=False, new=True)
self.input_cmb_maps = mymaps
self.input_cmb_spectra = totDL
else:
raise ValueError(
'Bad Dictionary given for PySM in the CMB part - see QubicSkySim.py for details')
else:
# The CMB part is not defined via a dictionary but only by the seed for synfast
# No map nor CAMB spectra was given, so we recompute them.
# The assumed cosmology is the default one given in the get_CAMB_Dl() function
# from camb_interface library.
if keyword is not None:
np.random.seed(keyword)
ell, totDL, unlensedCL = qc.get_camb_Dl(lmax=self.lmax)
mycls = qc.Dl2Cl_without_monopole(ell, totDL)
mymaps = hp.synfast(mycls.T, self.nside, verbose=False, new=True)
self.input_cmb_maps = mymaps
self.input_cmb_spectra = totDL
# Write a temporary file with the maps so the PySM can read them
rndstr = random_string(10)
hp.write_map('/tmp/' + rndstr, mymaps)
cmbmap = pysm.CMBMap(self.nside, map_IQU='/tmp/' + rndstr)
os.remove('/tmp/' + rndstr)
else:
# we add the other predefined components
preset_strings.append(skyconfig[k])
self.sky = pysm.Sky(nside=self.nside, preset_strings=preset_strings)
if iscmb:
self.sky.add_component(cmbmap)
def generate_cmb(self):
instr = self.instrument
nmc_cmb = self.params.nmc_cmb
nside = self.params.nside
npix = hp.nside2npix(nside)
smooth = self.params.gaussian_smooth
parallel = self.params.parallel_mc
root_dir = self.sim.base_path
output_directory = root_dir / "cmb"
file_str = self.params.output_string
channels = instr.keys()
n_channels = len(channels)
seed_cmb = self.params.seed_cmb
cmb_ps_file = self.params.cmb_ps_file
col_units = [self.params.units, self.params.units, self.params.units]
saved_maps = []
if parallel:
comm = lbs.MPI_COMM_WORLD
rank = comm.Get_rank()
size = comm.Get_size()
else:
comm = None
rank, size = 0, 1
if rank == 0:
output_directory.mkdir(parents=True, exist_ok=True)
if cmb_ps_file:
cl_cmb = hp.read_cl(cmb_ps_file)
else:
datautils_dir = Path(__file__).parent.parent / "datautils"
cl_cmb_scalar = hp.read_cl(datautils_dir /
"Cls_Planck2018_for_PTEP_2020_r0.fits")
cl_cmb_tensor = (hp.read_cl(
datautils_dir / "Cls_Planck2018_for_PTEP_2020_tensor_r1.fits")
* self.params.cmb_r)
cl_cmb = cl_cmb_scalar + cl_cmb_tensor
nmc_cmb = math.ceil(nmc_cmb / size) * size
if nmc_cmb != self.params.nmc_cmb:
log.info(f"setting nmc_cmb = {nmc_cmb}", rank)
perrank = nmc_cmb // size
if not self.params.save:
cmb_map_matrix = np.zeros((n_channels, 3, npix))
else:
cmb_map_matrix = None
os.environ["PYSM_LOCAL_DATA"] = str(output_directory)
for nmc in range(rank * perrank, (rank + 1) * perrank):
if seed_cmb:
np.random.seed(seed_cmb + nmc)
nmc_str = f"{nmc:04d}"
nmc_output_directory = output_directory / nmc_str
if rank == 0:
nmc_output_directory.mkdir(parents=True, exist_ok=True)
cmb_temp = hp.synfast(cl_cmb, nside, new=True, verbose=False)
file_name = f"cmb_{nmc_str}_{file_str}.fits"
cur_map_path = nmc_output_directory / file_name
lbs.write_healpix_map_to_file(cur_map_path,
cmb_temp,
column_units=col_units)
saved_maps.append(
MbsSavedMapInfo(path=cur_map_path, component="cmb",
mc_num=nmc))
sky = pysm3.Sky(
nside=nside,
component_objects=[
pysm3.CMBMap(nside, map_IQU=Path(nmc_str) / file_name)
],
)
for Nchnl, chnl in enumerate(channels):
freq = instr[chnl].bandcenter_ghz
if self.params.bandpass_int:
band = instr[chnl].bandwidth_ghz
fmin = freq - band / 2.0
fmax = freq + band / 2.0
fsteps = np.int(np.ceil(fmax - fmin) + 1)
bandpass_frequencies = np.linspace(fmin, fmax,
fsteps) * u.GHz
weights = np.ones(len(bandpass_frequencies))
cmb_map = sky.get_emission(bandpass_frequencies, weights)
cmb_map = cmb_map * pysm3.bandpass_unit_conversion(
bandpass_frequencies, weights, self.pysm_units)
else:
cmb_map = sky.get_emission(freq * u.GHz)
cmb_map = cmb_map.to(self.pysm_units,
equivalencies=u.cmb_equivalencies(
freq * u.GHz))
fwhm_arcmin = instr[chnl].fwhm_arcmin
if smooth:
cmb_map_smt = hp.smoothing(cmb_map,
fwhm=np.radians(fwhm_arcmin /
60.0),
verbose=False)
else:
cmb_map_smt = cmb_map
if self.params.save:
file_name = f"{chnl}_cmb_{nmc_str}_{file_str}.fits"
cur_map_path = nmc_output_directory / file_name
lbs.write_healpix_map_to_file(cur_map_path,
cmb_map_smt,
column_units=col_units)
saved_maps.append(
MbsSavedMapInfo(path=cur_map_path, component="cmb"))
else:
cmb_map_matrix[Nchnl] = cmb_map_smt
return (cmb_map_matrix, saved_maps)