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MultiDrizzle News
MultiDrizzle
in STScI_Python V2.9 Release
MultiDrizzle Version 3.3.5 has been included the release
of STScI_Python Version 2.9 on 13 November 2009. This version
includes all the fixes from the alpha
release provided earlier.
Please report any bugs
encountered while running this code to help@stsci.edu.
Improved
Distortion solution for ACS
Multidrizzle Version 3.2.1
using PyDrizzle 6.3.0
implements
the full distortion correction solution as calibrated by the ACS team
and
documented most recently in the ISR ACS
2007-08.
This includes applying a time-dependent distortion solution for ACS/WFC
data.
Initial testing indicates alignment between images taken in different
visits
with an RMS of about 0.05 pixels after applying this full solution to
ACS/WFC
data. More details on how to turn on this time-dependent
correction
can be found under Instrument-specific
behavior.
Resetting DQ
bits [Added: 5 June 2009]
MultiDrizzle processing in the pipeline automatically flags
cosmic-rays/defects in the DQ array of each input image using the 4096
DQ value. However, reprocessing with MultiDrizzle may want to
either ignore that value or completely re-compute what pixels need to
be flagged as bad by MultiDrizzle. The user can
reset bits in an input image DQ array so that MultiDrizzle can
reset them during improved reprocessing using these instructions, which
will be added to the next version of the Handbook.
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