Nutator Telecon Meeting, 25 May 2005

Present: Beasley, Rafal, Mangum, Wootten, Rick, Nick

Action Items:
Vertex resonance frequencies -- Rafal to look up.
Mistubishi design -- Rafal to contact Ukita.
Document upgrade and retitile, send to JP -- Wootten
Optics confirmation: Wootten to check with GB folks.
                     Wilson to check with ESO.
                     Haupt to check with ESO contract folks (tikra?)
                     Could check with NAOJ through Kawabe.

Frequencies of resonance--Vertex to be looked up by Rafal.  

Requirement for variable throw.  
Prototype--multiples of 48 ms, throws up to +/_1'.5.  
  Shortcomings in performance, and in location.
  What was cost of this one?  AI Rafal to come up with costs.
  Can it be upgraded?  Possibly.  Transition times probably OK, not in Al's document.
  If it were at prime focus, would be like Apex, uses space inside hexapod for
    counterbalancing.
  Where it can be?  Could be at prime focus.  It goes on the Mitsubishi antenna.  Don't
    know resonance profile, space available.
  Will be used on Vertex antenna for production testing so has two-antenna constraints.
  Beasley--Franz 
     Christoph verification of optical design.External contract.  Could be quite
        soon.  tikra contract.
     Talk to Wilson and see if capable person is there.
     Norrod or other in GB.  
     Could do this at NAOJ?  If we cannot do ourselves.  
     Add blanking time, chop direction. Resonance frequency. to science req document.
Marc send question to Ukita.  
Frequency--might spec 5 or 10 Hz.  in multiples of 48 ms.  Currently you just tell it
  how many multiples of 48 ms you want.  Can also do three position switching.
80% duty cycle.  
Provide existing design and look at what can be changed slightly to produce a better
  design.
Upgrade document, send to Japan.  Retitle Science requirements.

Draw back together in about a month, make a decision.  Have in budget $816K Y2K.  
+/- 1.5' to give margin.  Use prototype specs.
In call, let us know tradeoffs.  Put larger ones as goals.  
AI--me to send out minutes.