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