Transcript Aquisition Diagnostics

Design Team Report:
Acquisition and Diagnostics
Christopher Neyman
W. M. Keck Observatory
Keck NGAO Team Meeting #10
September 17, 2007
021 Robison Laboratory
Outline
•
•
•
•
•
Introduction
Acquisition
PSF camera
Atmospheric monitor
AO calibration, diagnostics, and metrology
2
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
3
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 (NGS+LGS)
– 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
4
Acquisition camera
• Lead: Chris Neyman
• Status:
Team: Neyman + consult DLM (3.4)
– 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
5
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
6
PSF Monitor Camera
• Lead: Mathew Britton
• Status:
Team: Matthew Britton
– 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
7
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
8
Atmospheric Profiler
• Lead: Mathew Britton
• Status:
Team: Matthew Britton
– 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”
9
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
10
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
11
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
12