Reduced Focal Anisoplanatism Error Demonstration at Keck


  • Lead: Chris Neyman
  • Scientific Team: Peter Wizinowich, Rich Dekany, Don Gavel, Brent Ellerbroek(TMT).
  • Software: Kevin Tsubota


This is a proof of concept demonstration identified as a NGAO Detailed Design Risk Reduction task. It also has potential benefit to existing AO systems at Keck and elsewhere. Use Cn2 information to reduced Focal Anisoplanatism Error. We will also consider other types of innovative single LGS reconstructors.

Meeting Minutes & Actions

Action Assigned Comments Due Date
Document intial Simulations Chris from LAOS circa 2006 Done
Check Keck Bayesian vs MVE Brent Essentially the same Done
Initial Round of Simulations Chris Is Cn2 or POLC more important 9/17/2010
Present results in revised units Brent nm rms and Effective FA Done
Cost & Schedule for testing with K2 AO Chris Closed loop MVE only Done
Next Meeting in 4 weeks ALL Exchange emails as needed, before date TBD

Meeting 1 August 20, 2010 Link
Meeting 2 October 1, 2010 Link
Meeting 3 November 5, 2010 Link


Simulation and Analysis

  • Reduced FA with Cn2 measurements
  • NGS TT Sharpening
  • Other

Observing Experiment Plans

Analysis and Reports

Performance of Current Keck Reconstructor


Milestone Date Comments
Requirement Review TBD

Project Management

  • WBS Description (TBD)
  • Schedule (TBD)

-- ChrisNeyman - 20 Aug 2010

Topic attachments
I Attachment History Action Size Date Who Comment
Unknown file format1 Cn2_optimal_LGS_reconstructors_V0.1 r1 manage 72.0 K 2010-08-25 - 00:10 RichardDekany  
Microsoft Word filedoc Cn2_optimal_LGS_reconstructors_V0_1.doc r1 manage 71.5 K 2010-08-25 - 18:13 RichardDekany  
PDFpdf Ellerbroek_JOSAA_1994a.pdf r1 manage 2874.5 K 2010-08-21 - 00:30 ChrisNeyman Ellerbroek JOSA A 1994, Constrained Min. Variance
PDFpdf vanDam_SPIE_2010_ModelingGMTAO.pdf r1 manage 241.6 K 2010-08-21 - 00:37 ChrisNeyman van Dam SPIE 2010
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Topic revision: r14 - 2010-12-01 - ChrisNeyman
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