def eta(self):
"Grid of positive frequency fourier-modes"
dnu = self.frequencies[1] - self.frequencies[0]
eta = fftfreq(int(len(self.frequencies) / self.n_obs),
d=dnu,
b=2 * np.pi)
return eta[eta > self.eta_min]
def ugrid_raw0(self):
"""
The 1D grid of u (fourier dual of l) at nu0. Used as the grid on a side of a 2D grid of the sky.
"""
return fftfreq(self.spatial_dist.ncells,
d=self.spatial_dist.resolution[0],
b=2 * np.pi)
def eta(self):
return -fftfreq(len(self.f0),
d=(self.f0[1] - self.f0[0]) * self.beam_model.nu0.value
)[1:len(self.f0) / 2][::-1] / self.beam_model.nu0.unit
def ugrid_raw0(self):
return fftfreq(self.ncells, d=self.resolution[0], b=2 * np.pi)
def uv_grid(self):
"""The grid of uv along one side"""
return fftfreq(N=self.n_cells, d=self.cell_size, b=2 * np.pi)