diff --git a/corsika/detail/media/GladstoneDaleRefractiveIndex.inl b/corsika/detail/media/GladstoneDaleRefractiveIndex.inl
index d0a13a98198ab7e8582026b9d3ccb4e3f27135d5..e86cbd00e35407e71918a7b90de0a1b433f46daf 100644
--- a/corsika/detail/media/GladstoneDaleRefractiveIndex.inl
+++ b/corsika/detail/media/GladstoneDaleRefractiveIndex.inl
@@ -18,9 +18,7 @@ namespace corsika {
                                                                        Point const point, Args&&... args)
       : T(std::forward<Args>(args)...)
       , seaLevelRefractiveIndex_(seaLevelRefractiveIndex)
-      , earthSurface_(point)
-      , seaLevelDensity_(this->getMassDensity(earthSurface_)) {}
-//      , ratio_((1. - seaLevelRefractiveIndex_) / (seaLevelDensity_ * cube(1_m) / 1_kg)) {}
+      , seaLevelDensity_(this->getMassDensity(point)) {}
 
   template <typename T>
   inline double GladstoneDaleRefractiveIndex<T>::getRefractiveIndex(Point const& point) const {
diff --git a/corsika/media/GladstoneDaleRefractiveIndex.hpp b/corsika/media/GladstoneDaleRefractiveIndex.hpp
index 49a1b504c813cda72dc61a157f69b9b136a62d58..a530f3850d9922ef652aebf6faa928cb57b24582 100644
--- a/corsika/media/GladstoneDaleRefractiveIndex.hpp
+++ b/corsika/media/GladstoneDaleRefractiveIndex.hpp
@@ -22,9 +22,7 @@ namespace corsika {
   class GladstoneDaleRefractiveIndex final : public T {
 
     double const seaLevelRefractiveIndex_; ///< The constant refractive index at sea level.
-    Point const earthSurface_; ///< A point at earth's surface.
     MassDensityType const seaLevelDensity_; ///< The constant mass density at sea level.
-//    MassDensityType ratio_; ///< (1 - seaLevelRefractiveIndex_) / seaLevelDensity_.
 
   public:
     /**