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  1. Data Management
  2. DM-6931

Clarify requirements on per-snap processing

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    • Team:
      Data Release Production

      Description

      The DPDD does not currently list any measurements that result from measurements on individual snaps or differences between snaps. However, I have heard plenty of informal discussion about such quantities. We need to clarify what we will measure on snaps (if anything), and codify this in the DPDD.

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            rhl Robert Lupton added a comment -

            We made it possible for the camera to merge the two 15s snaps into one 30s integration (saving 10% of elapse time, and potentially defeating the readnoise in u and significantly decreasing the crosstalk).

            If we do this, what happens to the diffFlux and diffFluxErr measurements in the DPDD?

            (Jim: yes, we'll need to do ISR on each of the snaps, or a modified ISR on the difference (e.g. no need for bias subtraction))

            Show
            rhl Robert Lupton added a comment - We made it possible for the camera to merge the two 15s snaps into one 30s integration (saving 10% of elapse time, and potentially defeating the readnoise in u and significantly decreasing the crosstalk). If we do this, what happens to the diffFlux and diffFluxErr measurements in the DPDD? (Jim: yes, we'll need to do ISR on each of the snaps, or a modified ISR on the difference (e.g. no need for bias subtraction))
            Hide
            tjenness Tim Jenness added a comment -

            Yes, there was an approved LCR last year on defining "Alternate Visit" to mean one 30 second exposure.

            Show
            tjenness Tim Jenness added a comment - Yes, there was an approved LCR last year on defining "Alternate Visit" to mean one 30 second exposure.
            Show
            gpdf Gregory Dubois-Felsmann added a comment - ( LCR-687 (Alternate Standard Visit) )
            Hide
            lguy Leanne Guy added a comment -

            Jim Bosch what is the status of this ticket? 

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            lguy Leanne Guy added a comment - Jim Bosch what is the status of this ticket? 
            Hide
            jbosch Jim Bosch added a comment -

            I've done nothing with this ticket recently.  I suspect it's being pre-empted by PST-level discussions about moving away from Standard Visits.  It might make sense to just close this, as I don't think it makes sense to take SST-level action in the foreseeable future.

            Show
            jbosch Jim Bosch added a comment - I've done nothing with this ticket recently.  I suspect it's being pre-empted by PST-level discussions about moving away from Standard Visits.  It might make sense to just close this, as I don't think it makes sense to take SST-level action in the foreseeable future.

              People

              • Assignee:
                jbosch Jim Bosch
                Reporter:
                jbosch Jim Bosch
                Watchers:
                Gregory Dubois-Felsmann, Jim Bosch, John Swinbank, Leanne Guy, Robert Lupton, Tim Jenness, Zeljko Ivezic
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                  Updated:
                  Resolved:

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