diff --git a/DroneSimulator/RealMode.cs b/DroneSimulator/RealMode.cs
index 862d57b..39079e8 100644
--- a/DroneSimulator/RealMode.cs
+++ b/DroneSimulator/RealMode.cs
@@ -212,6 +212,7 @@ namespace DroneSimulator
       public static float Noise;
       public static float Lateness;
       public static bool RealSimulation;
+      public static float Temperature = 25.0f;
 
       private uint last = 0;
 
@@ -226,7 +227,8 @@ namespace DroneSimulator
 
       public void Update(float value, uint time)
       {
-        value = Pressure - value * 12.15f;
+        //value = Pressure - value * 12.15f;
+        value = Pressure * MathF.Exp(-0.02896f * 9.81f * value / (8.314f * (Temperature + 273.15f)));
 
         if (!Enable)
         {