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Revision as of 15:59, 28 December 2009 by Mthornle (Created page with '== Help for clearcal:== <pre> Help on clearcal task: Re-initializes the calibration for a visibility data set Clearcal reinitializes the calibration columns in a measure…')
Help for clearcal:
Help on clearcal task: Re-initializes the calibration for a visibility data set Clearcal reinitializes the calibration columns in a measurement set. Specificially, it will set the MODEL_DATA column to unity in total intensity and zero in polarization, and it will set the CORRECTED_DATA column to the original (observed) DATA in the DATA column. Use the field and spw parameters to select which data to initialize. If the dataset does not yet have the scratch columns, they will be created and initilized for the whole dataset (field and spw ill be ignored). Keyword arguments: vis -- Name of input visibility file default: none; example: vis='ngc5921.ms' field -- Select field using field id(s) or field name(s). [run listobs to obtain the list id's or names] default: ''=all fields If field string is a non-negative integer, it is assumed a field index otherwise, it is assumed a field name field='0~2'; field ids 0,1,2 field='0,4,5~7'; field ids 0,4,5,6,7 field='3C286,3C295'; field named 3C286 adn 3C295 field = '3,4C*'; field id 3, all names starting with 4C spw -- Select spectral window default: ''=all spectral windows and channels spw='0~2,4'; spectral windows 0,1,2,4 (all channels) spw='<2'; spectral windows less than 2 (i.e. 0,1) spw='0:5~61'; spw 0, channels 5 to 61 spw='0,10,3:3~45'; spw 0,10 all channels, spw 3, channels 3 to 45. spw='0~2:2:6'; spw 0,1,2 with channels 2 through 6 in each. NB: Multiple channel ranges per spw are not supported in clearcal.