With fancy analysis tools approaching usability I looked some more into noise projections from PIT,YAW motion of the MC mirrors to MC length.
Injection channels are: C1:IOO-MC1-PIT_EXC. Actual injection signal is recorded in C1:IOO-MC1-PIT_OUT and similar.
Source channels for the projection are C1:IOO-WFS1_I_PIT_OUT_DQ and similar.
Response channel is C1:OAF-MCL_IN_IN1 or C1:IOO-MC_F_DQ.
MC auto-alignment was off.
1. Fixed sine injection @ 0.5Hz
Every injection lasted 4mins.
| Start time |
DOF |
Amplitude [counts_pk] |
rough SNR in ASD BW 0.04Hz |
| 16:09 |
MC1PIT |
25 |
- |
| 16:14 |
MC1YAW |
40 |
12 |
| 16:21 |
MC2PIT |
35 |
5 |
| 16:26 |
MC2YAW |
35 |
5 |
| 16:34 |
MC3PIT |
45 |
5 |
| 16:39 |
MC3YAW |
45 |
- |
2. Filtered white noise injection
Generated white noise from 0.5Hz-20Hz, then filtered that in the C1:IOO-MC1-PIT and similar filters by the following TF, (Notch 1Hz, Q=3, 40dB & 2 zeros @ 1.1Hz)
All injections lasted 4mins. I left the filters in the first filter bank but disabled them.
| Start time |
DOF |
Amp. @ 0.5Hz [counts_pk (?)] |
| 17:01 |
MC1PIT |
250 |
| 17:10 |
MC1YAW |
400 |
| 17:16 |
MC2PIT |
400 |
| 17:21 |
MC2YAW |
400 |
| 17:26 |
MC3PIT |
500 |
| 17:31 |
MC3YAW |
500 |
|