def _init_beams(self, primary, secondary):
if primary is None:
primary = BeamGaussian(
np.radians(self.calibration.get('primbeam')))
self.primary_beam = primary
if secondary is None:
secondary = BeamGaussian(
np.radians(self.calibration.get('primbeam')), backward=True)
self.secondary_beam = secondary
def __init__(self, fwhm, backward=False, nripples=0):
"""
Parameters
----------
fwhm : float
The Full-Width-Half-Maximum of the beam, in radians.
backward : boolean, optional
If true, the maximum of the beam is at theta=pi.
"""
BeamGaussian.__init__(self, fwhm, backward=backward)
self.nripples = nripples
def __init__(self, fwhm, backward=False, nripples=0):
"""
Parameters
----------
fwhm : float
The Full-Width-Half-Maximum of the beam, in radians.
backward : boolean, optional
If true, the maximum of the beam is at theta=pi.
"""
BeamGaussian.__init__(self, fwhm, backward=backward)
self.nripples = nripples
def _init_synthbeam(self, dtype, synthbeam_peak150_fwhm):
sb = SyntheticBeam()
sb.dtype = np.dtype(dtype)
if not self.ripples:
sb.peak150 = BeamGaussian(synthbeam_peak150_fwhm)
else:
sb.peak150 = BeamGaussianRippled(synthbeam_peak150_fwhm,
nripples=self.nripples)
self.synthbeam = sb
def _direct_convolution_(scene,
position,
area,
nu,
bandwidth,
horn,
primary_beam,
secondary_beam,
synthbeam,
theta_max=30):
rotation = DenseBlockDiagonalOperator(np.eye(3)[None, ...])
aperture = MultiQubicInstrument._get_aperture_integration_operator(
horn)
scene_nopol = QubicScene(scene.nside, kind='I')
projection = MultiQubicInstrument._get_projection_operator(
rotation,
scene_nopol,
nu,
position,
synthbeam,
horn,
primary_beam,
verbose=False)
masked_sky = MultiQubicInstrument._mask(scene, theta_max)
peak_pos = projection.matrix.data.index
pos = MultiQubicInstrument._check_peak(scene,
peak_pos,
peak_pos,
theta_max,
dtype=np.int32)
value = MultiQubicInstrument._check_peak(scene,
projection.matrix.data.value,
peak_pos,
theta_max,
dtype=np.float64)
integ = MultiQubicInstrument._get_detector_integration_operator(
position, area, secondary_beam)
b = BeamGaussian(synthbeam.peak150.fwhm / nu * 150e9)
theta0, phi0, uvec0 = MultiQubicInstrument._index2coord(
scene.nside, pos)
theta, phi, uvec = MultiQubicInstrument._index2coord(
scene.nside, masked_sky)
dot = np.dot(uvec0, uvec.T)
dot[dot > 1] = 1
dtheta = np.arccos(dot) # (#npeaks, #pixels_inside_mask)
maps = b(dtheta, 0)
maps /= np.sum(maps, axis=-1)[..., None]
Map = np.sum((maps * value[..., None]), axis=1)
Map = integ(aperture(Map))
Map *= bandwidth * deriv_and_const(nu, scene.nside)
return MultiQubicInstrument._masked_beam(scene, Map, theta_max)