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3.4.2.5 Quack
mode                =    ’quack’        #  Flagging mode (list/manual/clip/shadow/quack/  
                                        #   elevation/tfcrop/rflag/extend/unflag/summary)  
...  
     quackinterval  =        0.0        #  Quack n seconds from scan beginning or end  
     quackmode      =      ’beg’        #  Quack mode. ’beg’ ==> beginning of scan.’endb’ ==> end of  
                                        #   scan. ’end’ ==> all but end of scan. ’tail’ ==> all but  
                                        #   beginning of scan  
     quackincrement =      False        #  Flag incrementally in time?

quack is used to remove data at scan boundaries. quackinterval specifies the time in seconds to be flagged, and quackmode can be ’beg’ to flag the quackinterval at the beginning of each selected scan, ’endb’ at the end of scan. ’tail’ flags all but the beginning of scan and ’end’ all but the end of scan. The quackincrement is either True or False, depending if one wishes to flag the quackinterval from the first unflagged data in the scan, or from the scan boundaries independent of data being already flagged or not.


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