S1_S2

miepython.core.S1_S2(m, x, mu, norm='albedo', n_pole=0)[source]

Calculate the scattering amplitude functions for spheres.

The amplitude functions have been normalized so that when integrated over all 4*pi solid angles, the integral will be qext*pi*x**2.

The normalization is controlled by norm and should be one of [‘albedo’, ‘one’, ‘4pi’, ‘qext’, ‘qsca’, ‘bohren’, or ‘wiscombe’] The normalization describes the integral of the scattering phase function over all 4𝜋 steradians.

The units are weird, sr**(-0.5)

Parameters:

  • m – the complex index of refraction of the sphere

  • x – the size parameter of the sphere

  • mu – the angles, cos(theta), to calculate scattering amplitudes

  • norm – (optional) string describing scattering function normalization

  • n_pole – return n_pole term from series (default=0 means include all terms)

Returns:

S1, S2 – the scattering amplitudes at each angle mu [sr**(-0.5)]