It seems when the telescope is pointing to an extreme position (HA>4) the CCD temperature reader goes wrong and shows temperatures much above normal (>100 or just out of range for the display, assumed > 200). Once the telescope is taken back to a zenith position, temperature shows normal values again (~60).
We ran out of nitrogen when re-filling the dewar at midnight. Our friends from the 1.5m telescope help us to set up a new tank.
Total Times | Time Observed | Time Engineering | Time lost technical | Time lost weather | Time lost other | Total Program Time |
---|---|---|---|---|---|---|
2014-01-12 | 8.0 | 0.0 | 0.0 | 0.0 | 0.0 | 8 |
Links
[1] mailto:dnidever@umich.edu
[2] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/1307/delete?destination=print/content/enr-ctio-09-m-2014-01-12
[3] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/1307/edit?destination=print/content/enr-ctio-09-m-2014-01-12
[4] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/add/node/4871?destination=print/content/enr-ctio-09-m-2014-01-12
Smooth and productive night.
Dewar filled at 6:45am