### OBSDATE ###
20110312

### LOGDATE ###
110313

### OBSERVERS ###
BAW, YK

### WEATHER ###
Waxing cresent moon, ~60% humidity, there was a heavy rainfall only a few hours earlier.

### LOCATION ###
SUSI

### PROGRAM ###
Train SUSI to get fringes on a star after a recent auto-collimation.

### SIDEROSTATS ###
 n3  s1   

### TARGETS ###
hr2326

### PROBLEMS ###
Star pupil on the fringe box is still off center.

Found fringes at ~120um. After a long search though, from -2000um to 2000um. Initial search was at speed of 8um/s but later reduced to 5um. Snoff/snon numbers were set to ~1/2. The actual fringe had SNR>8.

We then lost the fringes first due to cloud, and later due to a lag in the North tip/tilt servo. The acquisition system cannot keep the star in the PAVO North tip/tilt box. We think power cycling the siderostats helped.

This time found the fringes again but at ~110um. SNR>6. The fringes cannot be locked in place for a very long time. Opcon's OPD error seemed to be tracking well with <1um and rarely went beyond it. But at the end, when we slew the cart back to zeroset, it had an error of ~90um.

With the fringes not staying locked for >2s, we can't tell if MUSCA is already at WLF position. We assumed it is since no its Zaber stage did not move since last alignment. We saved data anyway hoping it will be there. :) MUSCA is registering 150K/250K photons per 1ms/step x 1024 steps scan.

Just for the record, MUSCA zaber stage is now controlled by a nameless machine at 203.15.65.204.

Before PAVO and MUSCA were able to finish saving data, S1 failed. It has been failing reliably at some random interval after being in used for some time. We are unsure what was the cause.

Finally we gave up and 'endnight'.