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  1. Data Management
  2. DM-21868

Debug and fix the decorrelation afterburner in ip_diffim

    Details

    • Type: Bug
    • Status: In Progress
    • Resolution: Unresolved
    • Fix Version/s: None
    • Component/s: ip_diffim
    • Labels:
      None
    • Story Points:
      0
    • Epic Link:
    • Sprint:
      AP S20-2 (January), AP S20-3 (February), AP S20-4 (March), AP S20-5 (April), AP S20-6 (May), AP F20-1 (June), AP F20-2 (July), AP F20-5 (October)
    • Team:
      Alert Production

      Description

      The decorrelation afterburner either performs very little under- or very large overcorrection after changing the order of the images in DM-21809 in the science convolution case. Perhaps this is true in general, just was not apparent in the "normal" template convolution case given the negligible noise in the template.

      Hints:

      • Check whether there is an assumption regarding the normalization of the AL solution PSF.
      • Check the Fourier space operations in the implementation. There may be padding and low-/high frequency region swapping issues.

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            Hide
            ebellm Eric Bellm added a comment -

            Gabor Kovacs You may want to dig through https://jira.lsstcorp.org/browse/DM-6580 to see if there is any relevance.

            Show
            ebellm Eric Bellm added a comment - Gabor Kovacs You may want to dig through https://jira.lsstcorp.org/browse/DM-6580 to see if there is any relevance.
            Hide
            swinbank John Swinbank added a comment -

            Set SPs on this ticket to 0, as all work is being performed on its children.

            Show
            swinbank John Swinbank added a comment - Set SPs on this ticket to 0, as all work is being performed on its children.

              People

              • Assignee:
                gkovacs Gabor Kovacs
                Reporter:
                gkovacs Gabor Kovacs
                Watchers:
                Colin Slater, Eric Bellm, Gabor Kovacs, John Swinbank
              • Votes:
                0 Vote for this issue
                Watchers:
                4 Start watching this issue

                Dates

                • Created:
                  Updated:

                  Summary Panel