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DM-11090: Identify regression in HSC astrometric matching success rate between w_2017_17 and w_2017_25 #85

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merged 1 commit into from
Jul 21, 2017
Merged

DM-11090: Identify regression in HSC astrometric matching success rate between w_2017_17 and w_2017_25 #85

merged 1 commit into from
Jul 21, 2017

Commits on Jul 14, 2017

  1. config/hsc/processCcd.py: update maxOffsetPix 

    The expansion of the bbox search radius for reference objects to
bbox + maxOffsetPix (added in DM-9750) caused a significant regression
in the astrometric matching.  It seems this is due to an issue with how
matchOptimisticB is handling large numbers of reference stars.  The
default in obs_subaru of maxOffsetPix = 750 resulted in a significant
number of CCDs failing in processCcd (identified in DM-11020).  Here we
set that default to maxOffsetPix = 250 which effectively results in the
same number of CCDs in the RC dataset passing single frame processing
and equivalent quality based on a comparison of QA plots for the pre-
regression and post-fix runs.
    @laurenam
    laurenam committed Jul 14, 2017
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