1. 望遠鏡の運用状況 友野大悟

2. CAUTION Telescope is becoming unstable

3. 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 AO36?

4. Old mechanisms and electronics l Troubles on POpt AGSH Probe X axis l Problem on acquisition of star on NsIR AG –Image rotator? l Pointing error due to azimuth rail? l Instability of Time Code Generator l Old hardware for TWSs l etc

5. Work load from STN3 l Less reliable connection from home for night support l Change of URLs –.sum.naoj.org –.subaru.nao.ac.jp –@subaru.naoj.org l Lost documents l Transferring data from STARS

6. Work load from HSC l Unexpected increase of work load from around June 2008 l Detailed technical questions to overcome limits in weight, size, and cost l Required to manage tasks that will be done by engineers in Hilo and Mitaka, with coordinating with those done by the contractor

7. What to expect in FY2009-2011 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?

8. What to expect in FY2009-2011 l Replacement for the space of AO36? –Electronics and optics for AO36 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!

9. 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 Work items in coming years are to be studied l Ideas to replace AO36 are welcome