NGAO System Design Phase Update

1
NGAO System Design PhaseUpdate

• Peter Wizinowich, Rich Dekany, Don Gavel, Claire
  Max, Sean Adkins
• for NGAO Team
• SSC Meeting
• February 20, 2008

2
Presentation Sequence

• Management
• Science Case Requirements
• System Design
• Summary

3
Management
10/1/06
4/21/08
PDR
System Design Started
System Design Review
now
4
Project Update

• Report 6 submitted to Directors on 2/4/08.
• http//www.oir.caltech.edu/twiki_oir/bin/view.cgi/
  Keck/NGAO/SystemDesignPhasePlanning
• Emphasis during this report period has been on
• Subsystem design (Sept. Feb.)
• Including updates to the functional requirements
• Systems Engineering Management Plan (Jan. Mar.)
• Other major completed activities
• Project replan science case requirements
• NSF TSIP funding awarded for preliminary design
  phase
• 2M of 2.7M preliminary design budget
• MOU for telescope time complete. Contract being
  drafted.
• No news yet on ATI proposal

5
System Design Milestones
MILESTONE DATE STATUS
1 SD SEMP Approved 10/9/06 Complete
2 SD phase contracts in place 10/27/06 Complete
3 Science Requirements Summary v1.0 Release 10/27/06 Complete
4 System Requirements Document (SRD) v1.0 Release 12/8/06 Complete
5 Performance Budgets Summary v1.0 Release 6/15/07 Complete
6 SRD v2.0 Release 5/22/07 Nearly complete
7 Trade Studies Complete 6/22/07 Complete
8 SRD v3.0 Release 9/7/07 Not started
9 System Design Manual (SDM) v1.0 Release 9/21/07 Complete
10 Technical Risk Analysis V1.0 Release 9/21/07 Complete
11 Cost Review Complete 12/7/07 In process
12 SDM v2.0 Release 2/12/08 In process
13 System Design ReviewPackage Distributed 3/4/08 New date 3/18/08
14 System Design Review 3/31/08 New date 4/21/08
15 SDR Report Project Planning Presentation at SSC meeting 4/14/08 New date 4/30/08
Requirements ? Performance Budgets Trade
Studies ? System Architecture Functional
Requirements ? Subsystem Design Functional
Requirements ? Management Plan (post-SDR)
6
Schedule Budget

• Schedule 73 of System Design Phase work
  complete through Jan.
• 48 of remaining work is system design. Wrapping
  up at conceptual level.
• Budget 89 of SD Phase budget (1170k) spent
  through Jan.

7
System Design Review

• Date April 21, 2008.
• Reviewers
• Brent Ellerbroek (TMT)
• Bob Fugate (formerly of SOR)
• Andrea Ghez (UCLA)
• Norbert Hubin (ESO, Chair)
• Nick Scoville (Caltech)
• Gary Sanders (TMT)
• Review will follow WMKO guidelines
• SDR package distributed with 2 weeks for reviewer
  comments
• Reviewer response distributed prior to review
  final agenda set
• SDR will focus on issues identified by reviewers
• Charter draft materials can be found at
  http//www.oir.caltech.edu/twiki_oir/bin/view/Keck
  /NGAO/SystemDesignReview

8
Science Case Requirements
9
Progress on Defining Science Requirements

• Release 2 of the Science Case Requirements
  Document is complete
• Release 2 of System Requirements Document is
  almost complete
• Observatory requirements further developed
• Remaining tasks identified and assigned
• David Le Mignant Liz McGrath supporting this
  effort

10
Updated Science Requirements Summary
11
Each Science Driver has a Requirements Table

• Summarizes requirements discussed in text and
  figures
• Formatted for input into System Requirements
  Document and into the Contour Database of
  Functional Requirements
• Example part of the Requirements Table for
  High-Redshift Galaxies

12
Progress on Science Cases

• Key Science Drivers new analysis and content
• Galaxy Assembly and Star Formation History
  analysis of cooling requirements to decrease
  background
• Nearby Active Galactic Nuclei discussion of
  required spatial resolution
• General Relativity Effects at the Galactic Center
• Extrasolar Planets around Low-Mass Stars
  definition of 3 target sets with distinct
  requirements
• Multiplicity of Minor Planets optimum
  wavelengths and sampling
• Science Drivers new analysis and content
• QSO Host Galaxies
• Gravitational Lensing (by galaxies and clusters)
• Characterization of Gas Giant and Ice Giant
  Planets their Moons
• Backup Science (be sure we can do good NGS
  science when laser cant be used)

13
NGAO System Design
14
AO Opto-Mechanical Design
NGS WFS
Visible Imager
Rotator
DM2
DM1
to OSIRIS
NIR Imager
LGS WFS
Deployable IFS
15
AO Wavefront Sensor Design
LGS pickoff WFS
Tip-Tilt Sensor
16
System Configurations
Science Cases drive the AO system configurations
(i.e., required hardware control)
17
System Configurations
18
Summary

• Management
• Replan for remainder of system design phase
  completed
• Good progress on Systems Engineering Management
  Plan
• On track for System Design Review
• NSF TSIP funding for preliminary design!
• Technical
• Subsystem design phase completed
• Functional requirements completed

Team remains committed excited about NGAO!