Transcript PowerPoint

Design Team Report:
AO Operational Tools
(aka Acquisition and Diagnostics)
Christopher Neyman
W. M. Keck Observatory
(for the Operational tools team)
Keck NGAO Team Meeting #11
November 5, 2007
Videoconference
Outline
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Introduction
Acquisition
PSF camera
Atmospheric monitor
AO calibration, diagnostics, and metrology
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AO operational tools
• 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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Acquisition camera
• Lead, Team: Chris Neyman
• Status:
– Conceptual design of the acquisition cameras including consideration of
the location and optical interface
– Neyman finished sensitivity (photon) budget for the acquisition cameras
– Favor IR detector for LOWFS/deployable IFU
– Separate LGS acquisition
• Integrate with LGS WFS in expedient way
• To do:
– Finalize acquisition processing steps (flow chart level)
• Need to coordinate with operations teams (David LeMignant)
– Finalize optical/mechanical interfaces
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PSF Monitor Camera
• Lead, Team: Mathew Britton
• Status:
– Draft requirements
– Identified preferred location for camera
– First cut at sensitivity and sky coverage: no show stoppers
• To do:
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Focus on analysis of feasibility of technique
Delay other conceptual design work
Assumption, it is a small risk to add camera to design later
More of Mathew’s hours in November
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Atmospheric Profiler
• Lead, Team: Mathew Britton
• Status:
– Draft requirements assuming current MASS/DIMM acceptable
• To do:
– Verify expected performance is sufficient
– More of Mathew’s hours in November
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Proposed AO diagnostic systems
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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
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Diagnostics, Calibration, Metrology
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Lead, Team: Chris Neyman
Status: Documented requirements for radiometric calibration
sources, AO point source simulators, and atmospheric phase
screens
To Do:
– Outline needed accuracy from wavefront error budget
– Complete interfaces with AO non RTC and RTC control systems
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