gauss_beam

zdm.beams.gauss_beam(thresh=0.001, nbins=10, freq=1400000000.0, D=64, sigma=None)

initialises a Gaussian beam D in m, freq in MHz e.g. Parkes HWHM is 7 arcmin at 1.4 GHz #thresh 1e-3 means -6.7 is range in lnb, 3.74 range in sigma