Example #1
0
def bulk_scatter(wavelength, temp, dist, diameters, canting_width=None):
    csec_units = 'mm**2'

    scatt = scattering.scatterer(wavelength, temp, 'water',
            diameters=diameters, shape='oblate')
    if canting_width is not None:
        scatt.angle_width = canting_width
    scatt.set_scattering_model('tmatrix')

    z = to_dBz(scatt.get_reflectivity_factor(dist, polar='h'))
    zdr = (z - to_dBz(scatt.get_reflectivity_factor(dist,
        polar='v'))).rescale('dB')
    atten = (scatt.get_attenuation(dist, polar='h').rescale('1/km') * exp_to_dB)
    diff_atten = (atten -
            scatt.get_attenuation(dist, polar='v').rescale('1/km') * exp_to_dB)
    kdp = ((scatt.get_propagation_wavenumber(dist, polar='h') -
            scatt.get_propagation_wavenumber(dist, polar='v')) * pq.rad).rescale(
                    'deg/km')
    delta = (scatt.get_backscatter_differential_phase(dist) * pq.rad).rescale('deg')

    return ScatterResults(z, zdr, atten, diff_atten, kdp, delta)
        delta_d = -angle(-scatt.S_bkwd[0,0].conj() * scatt.S_bkwd[1,1],
                deg=True).squeeze()
        ax[0,2].plot(d_plot, delta_d, temp_color, label=plot_label)

        diff_sig_b = to_dB(scatt.sigma_bh / scatt.sigma_bv).squeeze()
        ax[1,0].plot(d_plot, diff_sig_b, temp_color, label=plot_label)

        diff_sig_e = to_dB(scatt.sigma_eh / scatt.sigma_ev).squeeze()
        ax[1,1].plot(d_plot, diff_sig_e, temp_color, label=plot_label)

        diff_phase = (scatt.S_frwd[0, 0] -
                scatt.S_frwd[1, 1]).real.squeeze().rescale('mm')
        ax[1,2].plot(d_plot, diff_phase, temp_color, label=plot_label)

        z = to_dBz(scatt.get_reflectivity_factor(dist, polar='h'))
        zdr = (z - to_dBz(scatt.get_reflectivity_factor(dist,
            polar='v'))).rescale('dB')
        atten = (scatt.get_attenuation(dist, polar='h').rescale('1/km') * exp_to_dB)
        diff_atten = (atten -
                scatt.get_attenuation(dist, polar='v').rescale('1/km') * exp_to_dB)
        kdp = ((scatt.get_propagation_wavenumber(dist, polar='h') -
                scatt.get_propagation_wavenumber(dist, polar='v')) * pq.rad).rescale(
                        'deg/km')
        delta = (scatt.get_backscatter_differential_phase(dist) * pq.rad).rescale('deg')
    #    temp_color = plt.get_cmap('RdBu')(plt.Normalize(0,30)(t))
        scatter_kwargs = dict(c=temp_color, edgecolor='none', alpha=0.4)
        ax2[0,0].scatter(qr, z, **scatter_kwargs)
        ax2[0,1].scatter(qr, atten, **scatter_kwargs)
        ax2[0,2].scatter(qr, delta, **scatter_kwargs)
        ax2[1,0].scatter(qr, zdr, **scatter_kwargs)