From 073fe4643e0616694a3d390da6d7dcfd3af120f3 Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Thu, 9 Jan 2020 21:23:18 +0100
Subject: Calculate Rayleigh coefficients using Nishita and Hillaire

i.e. plugging the values for n and N given in [1, Sec. 3.3] into eqs. (1) resp. (3) given by [2].

[1]: Hillaire. “Physically Based Sky, Atmosphere and Cloud Rendering in Frostbite”
[2]: Nishita et. al. “Display of the Earth Taking into Account Atmospheric Scattering”
---
 planets.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/planets.py b/planets.py
index 50f6bd0..4570019 100644
--- a/planets.py
+++ b/planets.py
@@ -5,7 +5,7 @@ earth = {
     'rayleigh_atmos_height': 7994,
     'mie_atmos_height'     : 1200,
 
-    'rayleigh_beta': (5.196e-6, 12.142e-6, 29.645e-6),
+    'rayleigh_beta': (5.4717e-6, 12.7853e-6, 31.2142e-6),
     'mie_beta'     : (21e-6),
     'mie_g'        : 0.75
 }
-- 
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