diff --git a/NPLib/Detectors/Nebula/TNebulaPhysics.cxx b/NPLib/Detectors/Nebula/TNebulaPhysics.cxx
index 78dcb0e9c2fac072a70672ed5ad498ca3cf48e30..6a9202c7a4136d8c325bf277e154d9e73e9e9deb 100644
--- a/NPLib/Detectors/Nebula/TNebulaPhysics.cxx
+++ b/NPLib/Detectors/Nebula/TNebulaPhysics.cxx
@@ -108,7 +108,7 @@ void TNebulaPhysics::ReadXML(NPL::XmlParser xml){
       slwTd[id] = 0;
 
       // DT position cal
-      DTa[id] = 0;//!
+      DTa[id] = 1;//!
       DTb[id] = 0;//!
 
 
@@ -235,8 +235,6 @@ void TNebulaPhysics::PreTreat() {
 void TNebulaPhysics::ReadAnalysisConfig() {
 }
 
-
-
 ///////////////////////////////////////////////////////////////////////////
 void TNebulaPhysics::Clear() {
   DetectorNumber.clear();
@@ -248,8 +246,6 @@ void TNebulaPhysics::Clear() {
   IsVeto.clear();
 }
 
-
-
 ///////////////////////////////////////////////////////////////////////////
 void TNebulaPhysics::ReadConfiguration(NPL::InputParser parser) {
   vector<NPL::InputBlock*> blocks = parser.GetAllBlocksWithToken("NEBULA");