Since we have now been correctly accounting for the ~0.99 AA gain used in the DARM calibration model (see LHO aLOG 32907), I have updated the control room DTT templates with the correct calibration. This is done similarly to LHO aLOG 32542. The math needs to be updated to account for the improved understanding (see calibration subway map diagram): DELTAL_EXT W * [Derr/C_foton + A*Dctrl*delay] ---------- = ---------------------------------- PCAL_RX_PD m * f^2 * AA_a/(AA_a gain) * AA_d m DELTAL_EXT * [C_foton/C_real] / [W * AA_a * AA_d * OMCpoles * OMCtoCALCSdelay * lightTimeDelay * unknownSensingDelay] --- = ----------------------------------------------------------------------------------------------------------------------- m sign * PCAL_RX_PD / [f^2 * AA_a/(AA_a gain) * AA_d] Then the Pcal to DARM calibration is: [C_foton/C_real] * f^2 --------------------------------------------------------------------------------------------------------- [W * sign * (AA_a gain) * uncompensatedOMCpoles * OMCtoCALCSdelay * lightTimeDelay * unknownSensingDelay] For the broad band Pcal to DARM measurement, since the calibration is applied separately to PCAL_RX_PD, we only need: [C_foton/C_real] --------------------------------------------------------------------------------------------------------- [W * sign * (AA_a gain) * uncompensatedOMCpoles * OMCtoCALCSdelay * lightTimeDelay * unknownSensingDelay] I have made a new control room calibration folder containing these scripts and calibration transfer function products, using the latest DARM reference model: /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O2/H1/Scripts/ControlRoomCalib/H1_pcal2darm_correction.m /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O2/H1/Scripts/ControlRoomCalib/pcal2darm_calib.txt /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O2/H1/Scripts/ControlRoomCalib/caldeltal_calib.txt The latest DTT measurements have been updated to include these transfer function products: /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O2/H1/Measurements/SensingFunctionTFs/2017-01-03_H1_PCAL2DARMTF_4to1200Hz_8min.xml /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O2/H1/Measurements/SensingFunctionTFs/2017-01-03_H1_PCAL2DARMTF_BB_5to1000Hz.xml