Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.mrao.cam.ac.uk/projects/OAS/pmwiki/uploads/MROIFastTipTilt.MROIFastTipTilt/ftt-kick-off.pdf Дата изменения: Fri Aug 6 17:10:44 2010 Дата индексирования: Sat Mar 1 04:07:21 2014 Кодировка: Поисковые слова: внешние планеты

The MROI Fast Tip-Tilt/ Narrow-field Acquisition System (FTT/NAS) project
The MROI team Cavendish Laboratory

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Goals of today's presentation
Background and context
What's it all about

What:
The FTT/NAS system

How:
Organization

What now:
Near term goals and tasks

Questions

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There are a number of optical/infrared arrays

Keck

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Our vision is to build the world's best
Much better sensitivity Best imaging capability Highest observing efficiency

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Where are we today?

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Where are we today?

Original intent: deliver a 6-element array by 2009
Compromised by funding and management issues

Current plan: deliver a 3-element array by 2012
Install infrastructure for 6 telescopes No technical compromises, just fewer telescopes Use results from this to secure funds for expansion post 2012 Majority of funds from NMT ­ possibility of some STFC support
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The FTT/NAS system
Ensures that the light beam collected by a telescope is sent down the beam relay pipes "in the right direction"
The FTT/NA system monitors the light The active secondary mirror redirects it

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The FTT/NAS contract
Only concerns the first FTT/NA system, which will be delivered in two phases Phase 1: Conceptual design, part of preliminary design & delivery of a "First Light Camera" (FLC) for UT commissioning and integration
April 2010 ­ March 2011 March 2011 ­ June 2011 $490k $120k

Phase 2: Re-work of design & delivery of production unit
June 2011 ­ March 2012 $350k

Currently NMT only has funds to pay for Phase 1
Expect funds for Phase 2 to be available in 2011

Rest of the talk will deal with the Phase 1 contract only
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FTT/NAS system components

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Key challenges (i)
Two primary functions:
Target acquisition (NAS & FLC) Fast tip-tilt correction (FTT)

Must work on 16th magnitude stars (in good seeing) and accommodate changes in seeing Must stay precisely aligned (~1m) for T = 5°C Goal to operate down to ambient temperature of -10 °C, and up to relative humidity of 90%

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Key challenges (ii)
Space and power dissipation constraints Complex software
Data streaming to MRO Interferometer Supervisory System (ISS) Apply ISS-supplied dispersion & off-axis offsets to objective point

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People and roles
John Young Martin Fisher David Sun
Project leader, software, point-of-contact with NMT Deputy project leader, systems engineering, point-of-contact with NMT Mechanical engineering Software (real-time), electronics Controls, software design Software, optical analysis, PhD! Mechanical fabrication Electronics layout and fabrication Optical analysis, system design, contracts Design scrutiny, testing plans

Bodie Seneta

David Buscher Alex Rea

Peter Doherty John Ely

Chris Haniff

Donald Wilson

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Schedule
ACTIVITY (April 2010 to March 2011) Conceptual Design Derived Requirements Camera Evaluation Conceptual Design Conceptual Design Report & Review Preliminary Design Optical Design Preliminary Mechanical Design Electronic Design Test Design and Development Software Design and Development Preliminary Testing Systems Engineering Preliminary Design Report ACTIVITY (April 2011 to June 2011) Optional Extension Integrated Testing First Light Camera Testing First Light Camera Install Preliminary Design Report & Review APRIL MAY JUNE APRIL MAY JUNE JULY AUGUST SEPT OCT NOV DEC JAN FEB MAR

ACTIVITY (July 2011 to March 2012) Final Design Phase Final Design & Production Software Development & Testing Manufacturing & Procurement Integrated Testing Factory Acceptance Delivery, Installation & Site Acceptance

JULY

AUGUST

SEPT

OCT

NOV

DEC

JAN

FEB

MAR

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Meeting structure (i)
We envision two types of meeting: Schedule tracking meetings
Fortnightly, all attend Track progress against schedule
Collate material for monthly reports to NMT

Schedule next technical meetings Set near-term goals and resources to deploy

Technical meetings
Frequency: as needed, relevant people attend Focused discussion of design issues
Supported by discussion material (slides/memo) prepared in advance

Once design decision made, combine discussion material and meeting minutes into design note soon after meeting
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Meeting structure (ii)
These arrangements are deliberately different from those for the delay line activity Designed to help us keep to schedule
Funding squeeze means we cannot accommodate significant delays JSY/MF will track progress both formally (via schedule tracking meetings) and informally If falling behind will aim to re-assign resources or change plan of attack

Also aim to record design decisions as we go along
Want to make this an integral part of our procedures

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Supporting resources
Mailing list mro-ftt@mrao.cam.ac.uk
Archived at http://oberon.ra.phy.cam.ac.uk/lurker/ Note mro-ftt-archive@mrao.cam.ac.uk goes to archive only

Wiki at http://www.mrao.cam.ac.uk/research/OAS/pmwiki/
Used as document repository Upload completed documents (e.g. design notes) to wiki instead of attaching to email See JSY for edit password and/or assistance

Google Calendar
Will show meeting dates and project milestones Please add your planned absences Read-only version on wiki

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Near-term goals (i)
Bodie, Alex:
To coincide with camera loans: Evaluation of Andor and Princeton EMCCD cameras:
Latency, frame rate, real-time driver proof-of-concept

All:
Next 2 weeks: Derived requirements
Technical meetings Analysis

Alex:
Between camera loans: Start simulations to determine latency requirement

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Near-term goals (ii)
All: To start in 1 week: Conceptual Design
JSY/MF will allocate tasks

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Questions
Any questions?

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