Index: trunk/Mars/msim/MAtmosphere.h
===================================================================
--- trunk/Mars/msim/MAtmosphere.h	(revision 19765)
+++ trunk/Mars/msim/MAtmosphere.h	(revision 19766)
@@ -98,7 +98,16 @@
         Init(h);//, "ozone.txt", "aerosols.txt");
     }
-    MAtmosphere(Double_t obs=-1, const char *name1=0, const char *name2=0) : fAbsCoeffOzone(0), fAbsCoeffAerosols(0)
+    MAtmosphere(Double_t obs=0, const char *name1=0, const char *name2=0) : fAbsCoeffOzone(0), fAbsCoeffAerosols(0)
     {
         MAtmRayleigh::Init(obs);
+
+        if (name1)
+            InitOzone(name1);
+        if (name2)
+            InitAerosols(name2);
+    }
+    MAtmosphere(const char *name1, const char *name2) : fAbsCoeffOzone(0), fAbsCoeffAerosols(0)
+    {
+        MAtmRayleigh::Init(0);
 
         if (name1)