2023-12-11 Calibration Products Meeting

Attendees:

• Christopher Waters 
• Eli Rykoff 
• Daniel Weatherill 
• Robert Lupton 
• Agnès Ferté 

Notes:

• Christopher Waters 
  
  • Noise estimates in amp-offsets
    •  Variance in the fit.
  • Replacement calibrations defined.
  • Ticket management
  • Updated boxes.
  • Tech note / documentation.
• Agnès Ferté 
  • In Oxford this week.
  • Mostly in kind contribution work this week
  • Updated ISR task.
    • Updated tests.
    • What needs to happen to get this going.
    • Prevent inconsistency.
  • obs_fiberspectrograph git permissions.
• Andrés Alejandro Plazas Malagón 
  • Working on DM-41681
    • Astier large lag subtraction code.
    • Testing with Alex and Yousuke.
  • Other work with ISR ordering.
• Daniel Weatherill 
  • Working on T&S control software
    • For calibration observation tasking.
  • "Blocks" are the new concept.
    • Blocks might be the same as events.
    • State machine?
    • How does this relate to SAL checkpoints?
    • Define calibration blocks as a replacement of the camera style runs.
  • This will replace the existing scripts, with a set of choose-able snippets of code.
  • Technote coming out.
• Eli Rykoff 
  • New boxes on calibration path.
    • CTI and linearity ordering is an example of something that is out of place.
    • Overscan results needed for CTI.
    • Presentation from last week:
      • https://princeton.zoom.us/rec/share/ovBQAJBxJFafoUlZxil5rfYtpvbZG23XB3bdt_MCB8TJjXEhkJl0L5zIQzW8efBi.6TQQzv3YfwO7CRHn
    • Crosstalk source accounts for some of the differences with DECam.
  • Overscan refactor.
    • Split serial and parallel overscan to allow for crosstalk correction in the parallel overscan.
    • Masking of the parallel overscan is linked to the saturation level.
    • Solve existing bug fixes.
  • Saturation masking is applied prior to overscan, which is only fine when the overscan/bias level is small.
  • Per-amp configurations are needed for overscans, so that needs to be solved before we can move to the new ISR Task.
  • Testing new ISR Task.
    • How do we compare against the existing results if the ordering of the steps changes.
    • Run on new full focal plane data (although we should be able to down select to find images to test).
    • This is in addition to ci_cpp testing.
    • Can we imsim data to check things?
    • Can we work from the comcam simulations?
    • Do we need a new ci_cpp that does the new ISR task?
      • Can we switch cleanly to the new code.
• Robert Lupton 
  • Litho-black
    • Is this applied consistently across all ITL chips?
    • Check the flats.
  • Sky spectrograph:
    • Use masking to generate a spectrum with R~10 of the sky with LATISS.
    • This can be used as an input to constructing SED appropriate flats.