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  1. Data Management
  2. DM-16429

Ensure WCS (and other Exposure components) are retrieved properly when loaded individually

    Details

    • Type: Story
    • Status: Done
    • Resolution: Done
    • Fix Version/s: None
    • Component/s: obs_base
    • Labels:
      None
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    • Story Points:
      1
    • Sprint:
      AP S19-4
    • Team:
      Alert Production

      Description

      It looks like <exposure>_wcs datasets are coming from the header (which may be an approximation) instead of the true WCS in the FITS binary tables.  Fix this, and add support for more components if it's easy to do so.

      Note that using the header was once thought to be necessary to do this efficiently, but in fact there's always been a trick to get anything out of the binary tables efficiently (due originally to Paul Price, I think): load a 1-pixel subimage of the exposure, and pull the component out of that.

      However, since DM-15500 we've had an ExposureFitsReader class that provides direct and efficient access to all of those components without that trick, and that's what we should use here.

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              • Assignee:
                Parejkoj John Parejko
                Reporter:
                jbosch Jim Bosch
                Reviewers:
                Kian-Tat Lim
                Watchers:
                Hsin-Fang Chiang, Jim Bosch, John Parejko, John Swinbank, Kian-Tat Lim, Tim Jenness
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                  Updated:
                  Resolved:

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