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GEMINI OBSERVATORY...

MCAO Operational Concepts Definition Document...

Compiled By Brent Ellerbroek Contributors Corinne Boyer, Mark Chun, C line d'Orgeville, Brent Ellerbroek, and Francois Rigaut April 2001 Version 2.0 Issued by Brent Ellerbroek Date Approved By Group Manager Group Manager (if req.) Systems Engineer...

MCAO Operational Concepts Definition Document, 07/11/01...

Page 1 of 19...

Revision Control...

03-22-01 BRENT Removed references to Hokupa'a South throughout Included comment on pulsed vs. CW laser issues. Specified SALSA / laser shutter interface as using the GIS Revised BTO description and figure 1 extensively New layout for pointing and centering mirrors Beam dump on telescope top end ring included in baseline Relay optics no longer have zoom capability LLT is fixed, not deployable Included LLT dust cover and BTO pre-alignment cameras Mentioned periscope optics Revised AOM description and figure 2 Included Diagnostic WFS Included more detail on source simulator requirements Removed NGS WFS reference source Made LGS WFS reference sources optional Revised control loop block diagram Use of OIWFS for tip/tilt/focus adjustments Partitioned NGS/LGS control algorithm Revised SALSA description Clarified that SALSA / laser shutter interface is through the GIS Revised daytime calibration description Use of the diagnostic WFS LGS WFS reference sources listed as an option Revised nighttime calibration description Control and use of BTO pointing and centering mirrors No LLT deployment No beam dump on the dome Revised science operations description Included preparatory guide star observations Removed possible use of BTO beam dump shutter Dithering and Nodding DM and tip/tilt loops to remain closed during small dithers, and frozen during large nods Shutdown procedures Clarified that laser shutter is commanded via the GIS Removed telescope operator as a potential cloud sensor Eliminated potential use of beam dump shutter Speculated on satellite predictive avoidance MCAO Operational Concepts Definition Document, 07/11/01 Page 2 of 19...

Described procedures for startup after shutdown Included BTO commissioning tasks previously performed by Hokupa'a 85-South LGS Clarified terminology in Strehl error budget (numbers still need to be updated) 04-04-01 BRENT Updated Strehl error budget to be consistent with CoDR FPRD (still need new numbers for AOM error budgeting and new simulation results) 04-24-01 BRENT Incorporated various clarifications as recommended by Richard...

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PDF (131KB) documentation webdocs rev mcao pdr appdx c ocdd

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