TCfA Technical report no. 3/2017

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Observations of Toruń 32-m radio telescope secondary mirror using large-zoom camera: sag, thermal and temporal effects


We describe measurements of the long-term stability of the 32-meter radio telescope (RT-32) secondary mirror suspension, present observations from the observing campaign carried out in 2017.  The observations are being carried out real-time, non-stop in association with the current weather and telescope motion.

In this report we mainly focus on the vertical motion of the secondary mirror.  We briefly discuss (i) the gravitational sag models in relation to pointing precision, (ii) characterize thermal effects and (iii) long term time stability of the mirror suspension.