Grating System
   TILT STAGE
Tilt resolution – 1.4 arcsec
Tilt Position repeatability  1.4
arcsec
Tilt position  stability   <<1.4
arcsec
   TRANSPORT STAGE
Position repeatability +/-0.030 in
x,y in
Position repeatability +/-0.0005
in z
Position stability -+/- 10 arcsec