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  1. Data Management
  2. DM-29187

LATISS UTC/TAI problems were fixed on 2021-02-12

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    Details

    • Type: Story
    • Status: Done
    • Resolution: Done
    • Fix Version/s: None
    • Component/s: obs_lsst
    • Labels:
      None
    • Story Points:
      0.5
    • Team:
      Architecture
    • Urgent?:
      No

      Description

      The obs_lsst LATISS metadata translator assumes that data after RASTART_IS_BAD is off by 37s, but in fact this was fixed on 2021-02-12. Please fix the metadata translator.

      I'd do it myself, but I don't understand the comment

      # RASTART/DECSTART/RAEND/DECEND used wrong telescope location before this
      # 2020-02-01T00:00 we fixed the telescope location, but RASTART is still
      # in mount coordinates, so off by pointing model.
      RASTART_IS_BAD = Time("2020-05-01T00:00", format="isot", scale="utc")
      

      and would prefer you to clarify that the problem being fixed is not this one.

      There is a more serious problem too, namely that the correction of c. 0.154167 is applied multiple times. The RAEND in the header is 130.211695172908, but:

      exposure.getMetadata().get("RAEND"), butler.get("raw_md", dataId).get("RAEND")
      (130.82836183957568, 130.36586183957567)
      

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              Assignee:
              tjenness Tim Jenness
              Reporter:
              rhl Robert Lupton
              Reviewers:
              Robert Lupton
              Watchers:
              Michael Reuter, Robert Lupton, Tim Jenness
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                Dates

                Created:
                Updated:
                Resolved:

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