Several problems:
1) Failure of compressor #3 at the start of the night. Humberto restarted it and we started observing withou problems. However, at 12:30am, it failed again and this time the electronic team decided to change the compressor. It took 30 minutes
2) Multiple hexapod failures. I counted a total of 21 failures totasl. Does not seem to be a pattern of when these failures happen. It takes at least 3 minutes to recover from a failure (sometimes more like 5 min), so this is a little bit more than 1 hour lost because of the hexapod failures. Times of failures were:
21:19
21:38
21:48
22:41
22:49
23:08
23:12
23:16
23:36
23:51
23:57
00:25
01:09
02:07
02:20
02:30
02:54
03:03
03:30
03:51
03:57
3) SISPI Guis in observer3 froze several times during the night, more times than usual. In particular the Alarm History GUI hanged almost continually. This complicated the night since no sound was produced when there was a hexapod failure and it was harder to detect that a failure had happened. We had to be continuously looking at the Observer Console or ICS for errors. Communication problem somewhere?
| Total Times | Time Observed | Time Engineering | Time lost technical | Time lost weather | Time lost other | Total Program Time |
|---|---|---|---|---|---|---|
| 2023-11-29 | 7.0 | 0.0 | 1.5 | 0.0 | 0.0 | 8.5 |
Links
[1] mailto:Alistair.walker@noirlab.edu
[2] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/43047/delete?destination=print/node/21125
[3] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/43047/edit?destination=print/node/21125
[4] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/add/node/21125?destination=print/node/21125
Enginnering night to get calibrations for new filter N1008. Photometric conditions. Good seeing. We obtained:
1) sequences of spectrophotometric stars in each CCD of the camera. Stars observed were LTT1788 and LTT 3218
2) star flats with filters g, r, i and N1008
3) DECal scan: maintenance before the start of the night. With Hernan, we refilled the cooling liquid tank. It had been several months since the last time we did a scan, so I was happy to see the software was working all right. Unfortunately, there was no time to complete the scan since we finished rather late the previous tasks.