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  1. DRP 2-D Pipeline
  2. PIPE2D-930

Problems when creating variance images in psf modelling

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    Details

    • Type: Task
    • Status: Done (View Workflow)
    • Priority: Normal
    • Resolution: Done
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None
    • Story Points:
      3
    • Sprint:
      2DDRP-2021 A11

      Description

      (This ticket is a consequence of an attempt to do finer granulation of PIPE2D-928). 

      I am noticing problems in my creation of variance images. At the moment I am creating ``custom'' variance images which are created from the model images. To get the relation between the values in the  variance and science images I do a simple 2nd order fit and apply this relation to the model image to get the variance image. The mistake I have made is that I am reusing the previous variance image (instead of the original variance image) to create a new variance image. This leads to runaway values in the variance image and eventually to the crash. 
      I have only noticed this now as I have modified the 2nd order fit procedure in order to avoid nonophysical values (which I believe was the origin of strange features in the image ``example_in_focus'' in PIPE2D-615) 

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          Task - A task that needs to be done. PIPE2D-697 Analyze Subaru images and create a 2d PSF solution - fiber illumination constant

          • Normal - Normal priorities
          • In Progress
          relates to

          Task - A task that needs to be done. PIPE2D-931 Speed up creation of variance images in psf modeling algorithm

          • Normal - Normal priorities
          • Done

          Task - A task that needs to be done. PIPE2D-615 Illumination estimate of the pupil should be constant across different spots for single fiber

          • Normal - Normal priorities
          • Done

          Task - A task that needs to be done. PIPE2D-928 Improve psf modelling with fiber illumination constant across spots in the same fiber

          • Normal - Normal priorities
          • Won't Fix

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              • Assignee:
                ncaplar ncaplar
                Reporter:
                ncaplar ncaplar
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                  Updated:
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