<Keck NGAO Team Meeting #3>

9:50a - 2:30p PST

Wednesday, December 13, 2006

Tele/Videoconference

Dial-in Number: 977-280-4645 Passcode: 540030 Videoconference IP: 128.171.99.70 (Hualalai CR)

Goals:

• Review Progress on Performance Budgets
• Review Recent Trade Studies

Agenda:

• 9:50 am Welcome
• 10:00 am Management Report (Wizinowich) Management Report
  • Review study overall progress, progress against milestones, and summary financial situation
• 10:25 am Science Team Report (Max) [Verbal Report]
• 10:45 am Systems Engineering Report (Dekany) Systems Engineering Report (.ppt)
  • Review the status of all performance and efficiency budgets; identify areas needing additional science input.
• 11:10 am Trade Study Report: MOAO & MCAO (Gavel) Report (pdf) supplement (ppt)
  • From the WBS Dictionary: This trade study is intended to build our expertise with Multi Object and Multi Conjugate AO. The existing MOAO and MCAO design studies should be reviewed. The product should be a summary of the issues related to these two approaches, including an understanding of the potential risks, technical challenges, limitations, advantages and room for improvement with each of these approaches.
• 11:40 am Trade Study Report: Rayleigh Rejection Strategies (Velur) Rayleigh_rejection.ppt
  • From the WBS Dictionary: Evaluate the impact of unwanted Rayleigh backscatter to NGAO system performance. Consider the relative performance, cost, risk & schedule of various strategies for mitigation of LGS Rayleigh backscatter. Techniques include background subtraction, modulation & optimizing projection location. This issue is closely coupled to laser pulse format, with pulsed lasers generally providing more options for Rayleigh mitigation than CW lasers. Complete when NGAO baseline architecture selected.
• 12:00 pm Trade Study Report: Stand-alone T/T vs. DM on T/T Stage (Bauman) tip-tilt_platform_design_study_presentation.ppt
  • From the WBS Dictionary: Consider the performance, cost, risk, reliability, and maintainability of a stand-alone tip/tilt mirror vs. mounting an otherwise necessary mirror (e.g. a DM) on a fast tip/tilt stage. Note that high BW correction is difficult with a large or heavy mirror. Complete when tip/tilt approach selected.
• 12:20 pm Break
• 12:40 pm Update on Instrument Trade Studies (Adkins)
  • Science Instrument Reuse Cost/Benefit. From the WBS Dictionary: Consider the cost/benefit of reuse of existing Keck AO instruments, particularly OSIRIS and NIRC2, versus the benefit of design freedom for an all-new instrument suite. Instrument-Reuse-NIRC2-121206.ppt
  • Instrument Balance. From the WBS Dictionary: Consider the relative merit of installing NGAO on Keck I vs Keck II. This must take into account the long-term instrumentation strategy for Keck, available laser infrastructure, and impact on operations. Complete when architecture and location requirements documented.
• 1:00 pm Upcoming tasks and milestones (Wizinowich) .ppt
• 1:20 pm Discussion: Issues pertaining to ongoing and upcoming work (All)
• 2:30 pm Adjourn