Table 5: Polarization at quadrature $\langle Q/I \rangle_{90^\circ}$ (phase angle $\alpha =90^\circ $) for model planets with semi-infinite Rayleigh scattering atmosperes (single scattering albedo $\omega $) and with finite Rayleigh scattering layer (optical thickness $b_\tau $) and ground albedo $A_{\rm ground}$. Results are based on Monte Carlo simulations.
Semi-infinite Rayleigh scattering atmospheres  
$\omega $ $\langle Q/I \rangle_{90^\circ}$   $\omega $ $\langle Q/I \rangle_{90^\circ}$
1.0 32%   0.80 67%
0.99 40%   0.60 80%
0.95 50%   0.40 89%
0.90 57%   0.20 95%
Finite Rayleigh scattering atmospheres  
$b_\tau $     $\langle Q/I \rangle_{90^\circ}$  
  $A_{\rm ground}=$ 0.80 0.25 0.0
1.0      35%    53% 64%
0.5   27% 52% 76%
0.25   18% 42% 85%
0.15   12% 32% 90%
0.10   9% 25% 92%
0.05   5% 14% 95%
0.02   2% 7% 97%

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