We experienced two problems during the night:
1. Three images (1131268, 1131309 and 1131378) had the same problem experienced on the night of Sep5/6 (image 1130918) where data from CCDs N4,N5,N6,N7 and S4, S5, S6 and S7 are not transmitted. The resulting FITS files are "complete in a digital sense" (quoting Marco's words) but do not have stored data from the aforementioned CCDs. We decided not to restart the system, expecting that the next image readouts correctly in each case — which happened effectively.
2. An "interlock SISPI (HEXAPOD)" alarm was fired at 3:20 local time. Claudio had to restart SISPI. Similarly to the beginning of the night, Claudio ran the command "focus aos init_pid aos5" in the architect console after restarting the system. Images where out of focus right after resuming observing (image 1131321); we took a few 30-sec exposures in the r band (images 322-325) and the focus improved.
| Total Times | Time Observed | Time Engineering | Time lost technical | Time lost weather | Time lost other | Total Program Time |
|---|---|---|---|---|---|---|
| 2022-09-06 | 9.75 | 0.0 | 0.25 | 0.0 | 0.0 | 10 |
Links
[1] mailto:kathy.vivas@noirlab.edu
[2] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/41476/delete?destination=print/content/enr-ctio-blanco-4-m-2022-09-06
[3] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/41476/edit?destination=print/content/enr-ctio-blanco-4-m-2022-09-06
[4] mailto:dbrout@physics.upenn.edu
[5] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/41477/delete?destination=print/content/enr-ctio-blanco-4-m-2022-09-06
[6] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/41477/edit?destination=print/content/enr-ctio-blanco-4-m-2022-09-06
[7] mailto:alfredo.zenteno@noirlab.edu
[8] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/41478/delete?destination=print/content/enr-ctio-blanco-4-m-2022-09-06
[9] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/41478/edit?destination=print/content/enr-ctio-blanco-4-m-2022-09-06
[10] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/add/node/19368?destination=print/content/enr-ctio-blanco-4-m-2022-09-06
Before starting observing in the evening, Manuel and Rodrigo ran the command provided by Alistair (focus aos init_pid aos5) in the architect console.
As a comment: we tested observing satellite trails at the beginning of the night, in an attempt to test DECam for measuring brightness of some of the new satellite constellations being launched recently — as part of site protection initiatives. We succesfully captured trails of Starlink-1356, Oneweb-0311 and Oneweb-0290.