Difference between revisions of "Exportuvfits"

From CASA Guides
Jump to navigationJump to search
(Replaced content with "{{exportuvfits}}")
 
(2 intermediate revisions by one other user not shown)
Line 1: Line 1:
<pre>
+
{{exportuvfits}}
Help on exportuvfits task:
 
 
 
Convert a CASA visibility data set to a UVFITS file:
 
 
 
        This task write a UVFITS file, a general format data set used
 
        to transfer data between different software systems.  It is
 
        written in floating point format.  Many spectral windows can
 
        be exported to UVFITS only if they have the same shape.  For
 
        transferral to the AIPS interferometric packages, multi-source
 
        and combinesp options should be set to true.
 
 
 
        Keyword arguments:
 
        vis -- Name of input visibility file
 
                default: none;  example: vis='ngc5921.ms'
 
        fitsfile -- Name of output UV FITS file
 
                default: none;  example='3C273XC1.fits'
 
        datacolumn -- Visibility file data column
 
                default: => 'corrected'; example: datacolumn='model'
 
                Options: 'data' (raw),'corrected','model','weight'
 
        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/channels
 
                type 'help par.selection' for more examples.
 
              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, INCLUSIVE
 
              spw='*:5~61'; all spw with channels 5 to 62
 
              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.
 
              spw='0:0~10;15~60'; spectral window 0 with channels 0-10,15-60
 
                        NOTE ';' to separate channel selections
 
              spw='0:0~10^2,1:20~30^5'; spw 0, channels 0,2,4,6,8,10,
 
                    spw 1, channels 20,25,30
 
        antenna -- Select data based on antenna/baseline
 
              default: '' (all)
 
              If antenna string is a non-negative integer, it is assumed
 
                  an antenna index
 
                otherwise, it is assumed as an antenna name
 
              antenna='5&6'; baseline between antenna index 5 and index 6.
 
              antenna='VA05&VA06'; baseline between VLA antenna 5 and 6.
 
              spw='0~2:2~6'; spw 0,1,2 with channels 2 through 6 in each.
 
              spw='0:0~10;15~60'; spectral window 0 with channels 0-10,15-60
 
                        NOTE ';' to separate channel selections
 
              spw='0:0~10^2,1:20~30^5'; spw 0, channels 0,2,4,6,8,10,
 
                    spw 1, channels 20,25,30
 
        antenna -- Select data based on antenna/baseline
 
              default: '' (all)
 
              If antenna string is a non-negative integer, it is assumed
 
                  an antenna index
 
                otherwise, it is assumed as an antenna name
 
              antenna='5&6'; baseline between antenna index 5 and index 6.
 
              antenna='VA05&VA06'; baseline between VLA antenna 5 and 6.
 
              antenna='5&6;7&8'; baseline 5-6 and 7-8
 
              antenna='5'; all baselines with antenna index 5
 
              antenna='05'; all baselines with antenna name '05', vla antenna
 
              antenna='5,6,10'; all baselines with antennas 5, 6 and 10
 
        timerange  -- Select data based on time range:
 
              default = '' (all); examples,
 
              timerange = 'YYYY/MM/DD/hh:mm:ss~YYYY/MM/DD/hh:mm:ss'
 
              Note: if YYYY/MM/DD is missing dat defaults to first day in data set
 
              timerange='09:14:0~09:54:0' picks 40 min on first day
 
              timerange='25:00:00~27:30:00' picks 1 hr to 3 hr 30min on next day
 
              timerange='09:44:00' data within one integration of time
 
              timerange='>10:24:00' data after this time
 
        nchan -- Number of channels to select (superceded by spw)
 
                default: => -1 (all)
 
        start -- Start channel (superceded by spw)
 
                default => 0;
 
        width -- Channel averaging width (value > 1 indicates averaging)
 
                default =>1; example: width=3
 
                output data will average channels in groups of three.
 
        writesyscal -- Write GC and TY tables
 
                default: => False; Not yet available
 
        multisource -- Write in multi-source format
 
                default: => True;
 
                  false if one source is selected
 
        combinespw -- Combine all spectral windows at one time
 
                default: =>  True;
 
                  all spectral windows must have same shape.
 
                  successful aips transferral must have default=True
 
        writestation -- Write station name instead of antenna name
 
                default: True;
 
        async --  Run asynchronously
 
                default = true; highly recommended.
 
</pre>
 

Latest revision as of 18:23, 6 May 2015