CAUTION Telescope is becoming unstable Agenda l Unstable
CAUTION Telescope is becoming unstable
Agenda l Unstable operation due to – Age of mechanics and electronics – Increased work load for new instruments l What to expect in coming years – Modification of telescope in summer 2010 – Commissioning of HSC in summer 2011 – Replacement for the space of AO 36?
Old mechanisms and electronics l l Troubles on POpt AGSH Probe X axis Problem on acquisition of star on Ns. IR AG – Image rotator? l l Pointing error due to azimuth rail? Instability of Time Code Generator Old hardware for TWSs etc
Work load from STN 3 l l Less reliable connection from home for night support Change of URLs –. sum. naoj. org –. subaru. nao. ac. jp – @subaru. naoj. org l l Lost documents Transferring data from STARS
Work load from HSC l l l Unexpected increase of work load from around June 2008 Detailed technical questions to overcome limits in weight, size, and cost Required to manage tasks that will be done by engineers in Hilo and Mitaka, with coordinating with those done by the contractor
What to expect in FY 2009 -2011 l Modification of telescope in summer 2010 – a couple of months of down time l Commissioning of HSC in summer 2011 – a few months of down time l Schedule and work items are still under study – Earlier work on top unit exchanger?
What to expect in FY 2009 -2011 l Replacement for the space of AO 36? – Electronics and optics for AO 36 will be removed from the telescope in a couple of years – The AO layer above Cassegrain focus is a good place for e. g. • Better AG l Any suggestions for replacement subsystems are welcome!
Summary - our apologize, but. . . l Please expect more down time in the coming years despite the hard working engineers and technicians due to – Troubles – Longer lead time from additional work loads l l Work items in coming years are to be studied Ideas to replace AO 36 are welcome
- Slides: 10