pyDARM is now capable of pushing CAL-CS calibration parameters to the front end directly at the push of a button (read: with a cli command). This functionality is part of the new calibration framework that the Calibration group has been working on (first mentioned in alog 67061). The functionality provided by the pydarm export tool, when used in conjunction with pyDARM's measure, report, and status tools, is meant to significantly reduce the time between calibration measurements and the corresponding updated IFO calibration, especially when the processed calibration measurements are relatively well-understood. 

pydarm export pushes the following to the front end:

- DARM loop transfer functions evaluated at calibration line frequencies to compute TDCFs (κT, κP, κU, and κC), fCC, fs, and Q. These are pushed as EPICS records. A list of the EPICS records used during O3 can be found in Table 1 of T1700106. A full list of channels pushed now can be found in this document from LHO 66043. 

- CAL-CS Foton filters for the inverse sensing function in H1CALCS.txt:

  
Filterbank
Purpose
  
H1CAL-CS_DARM_ERR
1/HC, inverse detuned SRC optical spring, coupled cavity pole, and high frequency roll-off
  
H1CAL-CS_DARM_ANALOG_ETMX_L1
1/HAU
  
H1CAL-CS_DARM_ANALOG_ETMX_L2
1/HAP
  
H1CAL-CS_DARM_ANALOG_ETMX_L3
1/HAT


The full command to use this new feature (from a test branch today or from the main pydarm branch soon) is python -m pydarm export.