diff --git a/src/sim/AtmosphericModel.h b/src/sim/AtmosphericModel.h
index 8d3a7a9..6ce5d0b 100644
--- a/src/sim/AtmosphericModel.h
+++ b/src/sim/AtmosphericModel.h
@@ -11,6 +11,8 @@ public:
    virtual ~AtmosphericModel();
 
    virtual double getDensity(double altitude) = 0;
+   virtual double getPressure(double altitude) = 0;
+   virtual double getTemperature(double altitude) = 0;
 };
 
 } // namespace sim