+ //Technical parameters of detector
+const Float_t AliITSmoduleSSD::kStereo = 0.0175; //Stereo Angle 17.5 mrad
+const Float_t AliITSmoduleSSD::kTan = 0.0175;
+const Int_t AliITSmoduleSSD::kNStrips = 768; //Number of strips on each side
+const Float_t AliITSmoduleSSD::kPitch = 0.095; //Distance strip - strip (mm)
+const Float_t AliITSmoduleSSD::kX = 72.96; //X size (mm)
+const Float_t AliITSmoduleSSD::kY = 0.3; //Y size (mm)
+const Float_t AliITSmoduleSSD::kZ = 40; //Thickness (mm)
+
+ // <------------------------------
+
+ //______________________________________________________________
+ //
+ // Parameters for simulation
+ //______________________________________________________________
+
+const Float_t AliITSmoduleSSD::kSigmaP = 0.003; //Gaussian sigm
+const Float_t AliITSmoduleSSD::kSigmaN = 0.002;
+const Int_t AliITSmoduleSSD::kSteps = 10; //Number of steps
+const Int_t AliITSmoduleSSD::kTresholdP = 1500;
+const Int_t AliITSmoduleSSD::kTresholdN = 2500;
+
+