BGAS        !   Backward Silicon Tracker   Geometry
*           !   Th.Naumann   11/12/2003
*
    2       !  length of subheader                                +1
    031211  !  date of creation (YYMMDD)                          +2
    1       !  # of modules                                       +3
*  disk - segment
    12      !  # of sectors/disk                                  +4
    5.900   !  min sensitive radius r detector                    +5
   12.044   !  max                                                +6
    0.040   !  pad silicon thickness                              +7
    0.030   !  r   silicon thickness                              +8
    0.030   !  u   silicon thickness                              +9
   -1.277   !  phi min (deg) incl overlap                        +10
   23.777   !      max                                           +11
*  z position of u detector, even phi sector, -z side
      6     !  # of z disks                                      +12
   -39.15   !  z disk 1                                          +13
   -42.85   !  z disk 2                                          +14
   -46.85   !  z disk 3                                          +15
   -51.15   !  z disk 4                                          +16
*  z offsets of detector types
    -0.694  !  pad                                               +17
     0.842  !  v                                                 +18
     0.00   !  u                                                 +19
*  z stagger of uneven to even sectors
    -0.18   !  pad                                               +20
    -0.18   !  v                                                 +21
    -0.18   !  u                                                 +22
*
    640     !  # of r strips                                     +23
    640     !  # of u strips                                     +24
      8     !  # of r pads                                       +25
   0.0096   !  r pitch                                           +26
   0.0075   !  u pitch                                           +27
    16      !  pitch subdivision                                 +28
    -4.62   !  u offset of first u strip                         +29
*  BST 3
   -55.95   !  z disk 5                                          +30
   -61.15   !  z disk 6                                          +31
    999.    !                                                    +32
    999.    !                                                    +33