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| 18:00UT: Up and running again, the Az-glitches are still there. | 18:00UT: Up and running again, the Az-glitches are still there. tau225~0.5 and very variable with clouds. |
Daily Reports
Bilal Ladjelate, Thomas Rose, Laurence Perotto, Stavroula Katsioli, Marco De Petris, Carsten Kramer arrive at the telescope for the 3rd NIKA2 week of the summer semester.
Oct 29th, Tuesday
16:00UT Thomas & Bilal start. Bilal gives a training session to the first-time users. One issue was noticed by AS/BL: tracking glitches in Azimuth by up to +/-6". These persist throughout. Glitches are a bit reduced in height when scanning slower.
21:00UT Lawrence & Stavroula take over night shift. No other issues: NIKA2, IMBfits, piic all working well. Variable weather between 0.4 and >0.8.
Oct 30th, Wednesday
05:00UT Marco & Carsten take over the morning shift. tau~0.4 (225GHz) mostly and rather stable. 091-19 continued. Pointing on nearby 0716+714. Focus on 0316+413.
around 8:00UT tau_225GHZ decreased down to 0.3. Still on the Project 091-19.
at 9:00UT Robert highligthed a problem on AZ movements during the tracking. An oscillation with an amplitude around 6 arcsec is present, not negligible for a 11" beam. A possible reason could be the high velocity in the scans, currently 60"/s, as expected for 40<EL<60 deg. We reduce the velocity to 40"/s. We still see the glitches, only reduced to an amplitude of about 4". We continue with 091-19 using 40"/s. A few alarms: antMD bad trace.
12:00UT: stopped. Reboot of vac1. Reset of encoders. Reboot of all mrt-lx* and vme machines became necessary.
18:00UT: Up and running again, the Az-glitches are still there. tau225~0.5 and very variable with clouds.