Index: trunk/Mars/hawc/runranger.sh
===================================================================
--- trunk/Mars/hawc/runranger.sh	(revision 19813)
+++ trunk/Mars/hawc/runranger.sh	(revision 19814)
@@ -16,5 +16,5 @@
 # Impact on ground (We can not use GroundR here, see --no-indirection)
 #TRUEVAR="GroundR"
-#TRUEVAR="GroundPhi"
+#TRUEVAR="atan2(Y,X)"
 #TRUEVAR="X"
 #TRUEVAR="Y"
@@ -76,5 +76,5 @@
 # Be careful, this is true MC information
 #GroundR   = GroundR
-#GroundPhi = GroundPhi
+#GroundPhi = atan2(Y, X)
 #GroundX   = X
 #GroundY   = Y