/users/VISsvn/HealthCheck/SR3
Several notifications :
1. Several (maybe coupling matrix) improvement were seemed in L -> IDAMP_T and _Y (Fig.1.)
2. Peak shape change in T->IDAMP_T in 60 mHz (Fig.2.)
3. The difference in H{1,2,3}->ACC_H{1,2,3} (Fig.4 - Fig.6.) around 1 Hz may come from the tuning of ACC response
4. Small peak change in 0.25 Hx F0->F0 and F1->F1(Fig.7. and Fig.8.)
5. IM T->T, peak height around 1 Hz changed (Fig.11.)
6. IM H1->H1, several discrepancy from previous measurement, some gain change? (Fig.16.)
7. TM P->P and P->L, about 10 dB discrepancy from previous measurement, (Fig.23)
8. TM Y->Y increased the gain from previous measurement(?) (Fig.24)
So the several improvement of coupling in IP is significant.
2. I checked the transfer function of geophone for previous one and current one(Fig.1.)
As shown in Fig.1., th shape around 1 Hz changed, so the reason of comment 3. would come from this issue
I checked the TFs measured in air. They look healthy except for IP. There were some differences from the reference.
- IP: L-T coupling became small, but a strange dip around 40mHz appeared in the L and T TFs.
- TM: A large recoil or coupling appeared at 0.5Hz in L-L TF. The gains of P-P and Y-Y TFs became large. The pitch mode was dominant in the H1/2/3/4-L TFs.
