The bump of noise in DARM around 30 Hz is mostly a forest of peaks. One of them (33.43 Hz) is actually a calibration line. For the others, I looked at coherence with corner suspension optical levers and witness sensors. Some of the peaks shos enough coherence to indicate that maybe the peak is due to motion of that suspension
Frequency Suspension 25.19 26.53 BS / PR3 27.04 BS / PR3 / SR3 27.42 27.50 27.72 28.22 29.50 PR3 / SR3 29.97 PR3 32.31 33.33 33.43 35.22 PR2 35.71 39.80 PR3 SR3
Here's a full table of coherence
25.19 | 26.53 | 27.04 | 27.42 | 27.50 | 27.72 | 28.22 | 29.50 | 29.97 | 32.31 | 33.33 | 33.43 | 35.22 | 35.71 | 39.80 | |
H1:SUS-BS_M3_OPLEV_PIT_OUT_DQ | 0.019 | 0.231 | 0.290 | 0.008 | 0.009 | 0.001 | 0.003 | 0.164 | 0.003 | 0.028 | 0.008 | 0.039 | 0.123 | 0.020 | 0.024 |
H1:SUS-BS_M3_OPLEV_YAW_OUT_DQ | 0.004 | 0.201 | 0.304 | 0.007 | 0.003 | 0.003 | 0.040 | 0.138 | 0.022 | 0.018 | 0.008 | 0.012 | 0.182 | 0.047 | 0.118 |
H1:SUS-PRM_M3_WIT_P_DQ | 0.003 | 0.013 | 0.020 | 0.003 | 0.024 | 0.001 | 0.013 | 0.121 | 0.042 | 0.005 | 0.001 | 0.001 | 0.040 | 0.107 | 0.001 |
H1:SUS-PRM_M3_WIT_Y_DQ | 0.003 | 0.017 | 0.002 | 0.008 | 0.014 | 0.021 | 0.049 | 0.001 | 0.008 | 0.016 | 0.033 | 0.021 | 0.009 | 0.007 | 0.006 |
H1:SUS-PR2_M3_WIT_P_DQ | 0.001 | 0.002 | 0.032 | 0.002 | 0.021 | 0.031 | 0.023 | 0.013 | 0.041 | 0.023 | 0.013 | 0.011 | 0.010 | 0.013 | 0.043 |
H1:SUS-PR2_M3_WIT_Y_DQ | 0.004 | 0.014 | 0.054 | 0.006 | 0.035 | 0.023 | 0.005 | 0.045 | 0.074 | 0.002 | 0.005 | 0.004 | 0.020 | 0.093 | 0.005 |
H1:SUS-PR3_M3_OPLEV_PIT_OUT_DQ | 0.023 | 0.257 | 0.297 | 0.003 | 0.033 | 0.007 | 0.005 | 0.166 | 0.017 | 0.031 | 0.001 | 0.004 | 0.188 | 0.007 | 0.165 |
H1:SUS-PR3_M3_OPLEV_YAW_OUT_DQ | 0.002 | 0.258 | 0.297 | 0.003 | 0.059 | 0.005 | 0.002 | 0.163 | 0.005 | 0.016 | 0.004 | 0.002 | 0.171 | 0.038 | 0.109 |
H1:SUS-PR3_M3_WIT_P_DQ | 0.026 | 0.051 | 0.005 | 0.022 | 0.017 | 0.035 | 0.025 | 0.065 | 0.365 | 0.005 | 0.001 | 0.028 | 0.070 | 0.039 | 0.021 |
H1:SUS-PR3_M3_WIT_Y_DQ | 0.064 | 0.072 | 0.030 | 0.000 | 0.020 | 0.001 | 0.000 | 0.052 | 0.772 | 0.036 | 0.079 | 0.042 | 0.001 | 0.353 | 0.005 |
H1:SUS-SRM_M3_WIT_P_DQ | 0.028 | 0.049 | 0.034 | 0.002 | 0.001 | 0.008 | 0.024 | 0.049 | 0.006 | 0.009 | 0.011 | 0.028 | 0.016 | 0.001 | 0.034 |
H1:SUS-SRM_M3_WIT_Y_DQ | 0.006 | 0.029 | 0.015 | 0.059 | 0.011 | 0.020 | 0.022 | 0.015 | 0.006 | 0.029 | 0.046 | 0.007 | 0.003 | 0.001 | 0.020 |
H1:SUS-SR2_M3_WIT_P_DQ | 0.004 | 0.002 | 0.008 | 0.006 | 0.014 | 0.005 | 0.054 | 0.013 | 0.540 | 0.008 | 0.001 | 0.014 | 0.012 | 0.121 | 0.008 |
H1:SUS-SR2_M3_WIT_Y_DQ | 0.013 | 0.008 | 0.039 | 0.029 | 0.028 | 0.010 | 0.010 | 0.003 | 0.521 | 0.004 | 0.008 | 0.003 | 0.068 | 0.153 | 0.008 |
H1:SUS-SR3_M3_OPLEV_PIT_OUT_DQ | 0.014 | 0.165 | 0.287 | 0.006 | 0.030 | 0.001 | 0.001 | 0.169 | 0.012 | 0.009 | 0.012 | 0.012 | 0.145 | 0.008 | 0.079 |
H1:SUS-SR3_M3_OPLEV_YAW_OUT_DQ | 0.029 | 0.133 | 0.290 | 0.007 | 0.040 | 0.003 | 0.001 | 0.173 | 0.013 | 0.010 | 0.008 | 0.005 | 0.020 | 0.006 | 0.175 |
H1:SUS-SR3_M3_WIT_P_DQ | 0.007 | 0.002 | 0.002 | 0.013 | 0.011 | 0.017 | 0.015 | 0.046 | 0.005 | 0.026 | 0.007 | 0.028 | 0.008 | 0.068 | 0.011 |
H1:SUS-SR3_M3_WIT_Y_DQ | 0.092 | 0.005 | 0.023 | 0.014 | 0.000 | 0.010 | 0.021 | 0.022 | 0.003 | 0.000 | 0.007 | 0.009 | 0.008 | 0.013 | 0.022 |
H1:SUS-MC1_M3_WIT_P_DQ | 0.031 | 0.032 | 0.016 | 0.005 | 0.012 | 0.025 | 0.003 | 0.020 | 0.658 | 0.003 | 0.006 | 0.001 | 0.042 | 0.125 | 0.015 |
H1:SUS-MC1_M3_WIT_Y_DQ | 0.004 | 0.000 | 0.009 | 0.013 | 0.014 | 0.004 | 0.057 | 0.111 | 0.124 | 0.017 | 0.020 | 0.012 | 0.047 | 0.034 | 0.041 |
H1:SUS-MC2_M3_WIT_P_DQ | 0.012 | 0.044 | 0.016 | 0.005 | 0.004 | 0.016 | 0.011 | 0.008 | 0.061 | 0.002 | 0.015 | 0.028 | 0.039 | 0.005 | 0.036 |
H1:SUS-MC2_M3_WIT_Y_DQ | 0.005 | 0.009 | 0.003 | 0.006 | 0.024 | 0.012 | 0.002 | 0.012 | 0.082 | 0.032 | 0.058 | 0.034 | 0.037 | 0.029 | 0.041 |
H1:SUS-MC3_M3_WIT_P_DQ | 0.010 | 0.014 | 0.039 | 0.015 | 0.025 | 0.043 | 0.032 | 0.008 | 0.015 | 0.003 | 0.003 | 0.009 | 0.008 | 0.018 | 0.003 |
H1:SUS-MC3_M3_WIT_Y_DQ | 0.003 | 0.047 | 0.044 | 0.009 | 0.043 | 0.024 | 0.004 | 0.095 | 0.006 | 0.049 | 0.004 | 0.027 | 0.015 | 0.008 | 0.001 |