drift chamber plane number in lepsana
-------------------------------------
       plane     z           plane# 
NDC
1      Y'(Y1)  -867          17 (* Y'=Y1)
2      Y (Y2)  -853          18 
3      U'(U1)  -839          19 
4      U (U2)  -825          20 
5      V'(V1)  -811          21 
6      V (V2)  -797          22   | 
				  | 
DC1                               |
7      X''(X3) -517.960022   16	  | 
8      V (V)   -490.247986    5	  | 
9      U'(U2)  -462.536011    4	  | 
10     U (U1)  -452.144012    3	  V 
11     X'(X2)  -424.432007    2	  +z
12     X (X1)  -414.040009    1

DC2
13     V (V)    808.538452   10
14     U'(U2)   843.179504    9
15     U (U1)   860.500000    8
16     X'(X2)   895.140991    7
17     X (X1)   912.461548    6

DC3
18     V (V)   1208.538452   15
19     U'(U2)  1243.179443   14
20     U (U1)  1260.500000   13
21     X'(X2)  1295.140991   12
22     X (X1)  1312.461548   11