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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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