this is a dtt session from last night showing the performance of the ITMX ISI

  The ISI is running a level 3 controller with TCrappy blend filters (40mHz on stage 1 translation)

  Sensor correction and feed forward are NOT running yet

  The units are kind of in nm/sec/rthz except that I haven't inverted the L4C and GS13 response (T240s are flat down to 10mhz)

  Left column is X, Y and Z amplitude spectra, Right column is rX, rY and rZ

  Center column is transfer function from the ground

  The GS13 plot is in nm/rtHZ and the GS13 noise plot is for a single instrument, so there are factors of 2-ish floating around

  and the GS13 is an in loop measurment