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  1. Data Management
  2. DM-14150

Diagnose behaviour of cModel initial fits with varying numbers of components

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    Details

    • Type: Story
    • Status: Won't Fix
    • Resolution: Done
    • Fix Version/s: None
    • Component/s: Data Release Production
    • Labels:
      None
    • Story Points:
      3
    • Epic Link:
    • Sprint:
      DRP S18-5, DRP S18-6
    • Team:
      Data Release Production

      Description

      I measured more diagnostics for differences in cModel performance with 2 vs 3 (default) vs 6 components in the initial fit. Performance-wise in HSC-deep r-band coadds, 2 components takes 6% less time than 3, while 6 takes 60% longer. Some galaxies have large differences in the quality of the initial fit, with slightly better fits on average with more components. However, the differences in the final fits are very modest, so there is little justification for using 6 components, and 2 might even be fine.

      A large number of relevant plots/tables can be generated by the notebook created in DM-14118 (lsst-dev:/home/dtaranu/src/mine/taranu_lsst/cModelConfigs.ipynb).

        Attachments

          Issue Links

          blocks

          Epic - Created by Jira Software - do not edit or delete. Issue type for a big user story that needs to be broken down. DM-14015 Investigate CModel Performance in S18

          • Done
          is blocked by

          Story - Created by Jira Software - do not edit or delete. Issue type for a user story. DM-14152 Investigate the spatial distribution of failed cModel fits

          • Done

          Story - Created by Jira Software - do not edit or delete. Issue type for a user story. DM-14168 Compare running times of cModel fits to individual objects with different parameters

          • Done
          is parent task of

          Story - Created by Jira Software - do not edit or delete. Issue type for a user story. DM-14172 Optimize cModel config parameters

          • Done
          SS-depends on

          Story - Created by Jira Software - do not edit or delete. Issue type for a user story. DM-14118 Create Jupyter notebook summarizing cModel config results

          • Done

            Activity

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            dtaranu Dan Taranu added a comment -

            This is superseded by DM-14172.

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            dtaranu Dan Taranu added a comment - This is superseded by DM-14172 .

              People

              Assignee:
              dtaranu Dan Taranu
              Reporter:
              dtaranu Dan Taranu
              Reviewers:
              Yusra AlSayyad
              Watchers:
              Dan Taranu, Yusra AlSayyad
              Votes:
              0 Vote for this issue
              Watchers:
              2 Start watching this issue

                Dates

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                Updated:
                Resolved:
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