The "noisemon pringle" actuator noise measurement from LLO alog 19853 has been calibrated to meters, and extended to the L1 and L2 stages of all test masses.

Total noise from these stages is estimated to be ~1e-20 m/rtHz around 30 Hz.  This includes driver noise, DAC noise, and glitches (to the extent they were present during the measurement).

A hierarchical noise budget PDF is attached. Here's how things look for ITMX L2:

From this plot you can see the following:

• Length control signal projections from the DAC drive and from the noisemon readback match well. (This is a calibration consistency check.)
• The pringle noise seems to closely approach DARM below 20 Hz, but this is due to contamination from ASC pitch signals (which has been present in DARM also).  Noisemon pitch and yaw are projected (using the length TF) to show the subtraction. The bottom of the roll bandstop suggests the true noise floor is consistent with the slope of the curve above 30 Hz.
• The DAC noise model from G1401399 is plotted for comparison. The model matches at high frequency but apparently underpredicts the noise below 200 Hz (though some of this band is subtraction-limited).

The calibration of these signals is approximate, based on the coil driver and suspension models -- not the precise measurements people have been taking during the past week. There may be some discrepancies especially in the L1 (UIM) stage.  The ETMY L1 plot definitely shouldn't be trusted, because its noisemons appear to be broken (see attached plot).

Scripts have been checked in to the NoiseBudget SVN.