Design Team Report: Acquisition and Diagnostics

1
Design Team Report Acquisition and Diagnostics
Christopher Neyman W. M. Keck Observatory
Keck NGAO Team Meeting 10 September 17, 2007
021 Robison Laboratory
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Outline

• Introduction
• Acquisition
• PSF camera
• Atmospheric monitor
• AO calibration, diagnostics, and metrology

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Acquisition and diagnostics overview

• Acquisition cameras to boresight science, TTFA
  and LGS sources
• Diagnostics
• Group of task related to AO quality assurance
  (QA)
• All seek to answer the question Is the data
  good?
• Assumptions temperature, humidity, cleanliness,
  status
• These functions are part of AO enclosure and
  bench
• AO non real-time software
• Assumptions AO telemetry data
• part of AO real-time software
• Overall team plans to
• Focus on requirements and interfaces
• Detailed design in subsequent phases

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Proposed AO diagnostic systems

• PSF camera (WBS 3.2.3.12)
• Science data calibration
• Check on AO performance
• Atmospheric profiler (3.2.310)
• Science data calibration (PSF off-axis)
• Tomography
• Integrated with AO (3.2.3.9)
• Radiometric calibration of instrument and AO
  focal planes
• Astrometric calibration source
• Point source simulator (NGSLGS)
• Turbulence simulator
• Alignment and registration aides
• Metrology
• Instrument and AO flexures, drifts, vibrations
• Observers for parts of AO system
• Example high speed interferometer looking at
  first DM

5
Acquisition camera

• Lead Chris Neyman Team Neyman consult
  DLM (3.4)
• Status
• Planning sheet done, reviewed by team, pending
  approval
• Inputs
• Acquisition time, conditions (full moon, dark
  sky), limiting magnitude (how faint)
• Requirements from science and science operations
  teams
• Interfaces
• Acquisition software (ACAM server, AO sequencer,
  Obs. sequencer)
• AO bench

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Acquisition Camera

• Key tech issues
• IR or visible
• Field of view
• Processing time
• Optical interface
• Deliverables
• Predicted performance of camera
• Design
• Requirements and interfaces
• Costs and risks
• Report

7
PSF Monitor Camera

• Lead Mathew Britton Team Matthew
  Britton
• Status
• Planning sheet done, reviewed by team, pending
  approval
• Inputs
• Performance budgets for photometry and astrometry
• CfAO PSF study team (Flicker, Britton, LeMignant,
  Veran, Jolissaint)
• Interfaces
• AO software
• AO optics, use dNIRI/LOWFS pickoffs or something
  else

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PSF Monitor Camera

• Key tech issues
• Anisoplanatism
• Non common path (need camera in second or first
  relay )
• Sky coverage (running out of NGS 3LOWFS, 1TWFS, 1
  PSF Camera)
• Optical interface
• Deliverables
• Predicted performance of camera
• Design
• Requirements and interfaces
• Costs and risks
• Report

9
Atmospheric Profiler

• Lead Mathew Britton Team Matthew
  Britton
• Status
• Planning sheet done, reviewed by team, pending
  approval
• Inputs
• Performance budgets for photometry and astrometry
• Requirements of tomography algorithm
• Interfaces
• AO software non real-time
• AO data repository
• Telemetry engine

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Atmospheric Profiler

• Key tech issues
• Is state of the art SLODAR or MASS/DIMM
  sufficient?
• Deliverables
• Predicted performance of profiler
• Design
• Requirements and interfaces
• Costs and risks
• Report

11
Diagnostics, Calibration, Metrology

• Lead Chris Neyman Team Chris
  Neyman
• Status Planning sheet done, reviewed by team,
  pending approval
• Inputs
• Wavefront error budget spread sheet
• The instrument definitions and requirements
• Calibration requirements for OSIRIS
• Science, system, and functional requirements
• Interfaces
• Optical bench
• AO optics
• AO software sequencer
• AO software device control

12
Diagnostics, Calibration, Metrology

• Key tech issues
• Are current calibration methods sufficient
• Deliverables
• Predicted performance of calibration systems
• Design or suggested vendor
• Requirements and interfaces
• Costs and risks
• Report