U Task Index
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ucase -- Convert a file to upper case
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uchcoord -- Update plate scale, shift, and rotation of WFPC2 images.
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uchscale -- Update plate scales of WFPC2 (and WFPC) images.
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ucrpix -- Update reference pixel, based on coordinates at one point.
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uniqfile -- Give a file a unique name prior to archiving.
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uniqid -- Create a unique character string identifier.
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uniqname -- Create a unique file name for archiving.
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uniqtab -- Give all the files in an STSDAS table unique names.
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unique -- Delete redundant elements from a list
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unlearn -- Restore the default parameters for a task or package
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unprotect -- Remove delete protection from a file
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unstep -- Consolidate several groups in an image into one group.
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unwrap -- Remove the 'wrap' from data that has exceeded the internal counter.
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update -- Update a task's parameters (flush to disk)
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upimgrdf -- convert a list of IRAF image files to RDF compatible format
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upqpoerdf -- convert a list of QPOE files to RDF compatible format
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upreffile -- Update calibration reference files names in image headers
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urand -- Uniform random number generator
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userpars -- Pset with parameters for user-defined function.
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using_detect -- describes the tasks available in the detect package
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using_spectral -- for more information about the spectral package
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using_timcor -- description of ROSAT timing correction tasks
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using_xplot -- guide to plotting tasks available to display Xray data
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utc -- ROSAT spacecraft clock to universal time data point description
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