<param type="any" name="phasecenter"><shortdescription>image center direction: position or field index or ephemeris source info, e.g., \'J2000 17:30:15.0 -25.30.00.0\', \'MARS\'. (\'\' = the center of pointing directions in MSes)</shortdescription><description>image center direction: position or field index or ephemeris source info, e.g., \'J2000 17:30:15.0 -25.30.00.0\', \'MARS\'. (\'\' = the center of pointing directions in MSes)</description>
<casaxml xsi:schemaLocation="http://casa.nrao.edu/schema/casa.xsd file:///opt/casa/code/xmlcasa/xml/casa.xsd" xmlns="http://casa.nrao.edu/schema/psetTypes.html" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<task type="function" startup="true" category="single dish" name="tsdimaging" visibility="experimental">
<shortdescription>SD task: imaging for total power and spectral data</shortdescription>
Task sdimaging creates an image from input single-dish data sets.
The input can be either total power and spectral data.
The coordinate of output image is defined by four axes, i.e., two
spatial axes, frequency and polarization axes.\n
By default, spatial coordinate of image is defined so that the all
pointing directions in POINTING tables of input data sets are covered
with the cell size, 1/3 of FWHM of primary beam of antennas in the
first MS. Therefore, it is often easiest to leave spatial definitions
at the default values. It is also possible to define spatial axes of
the image by specifying the image center direction (phasecenter),
number of image pixel (imsize) and size of the pixel (cell).\n
The frequency coordinate of image is defined by three parameters,
the number of channels (nchan), the channel id/frequency/velocity of
the first channel (start), and channel width (width).There are three
modes available to define unit of start and width, i.e., 'channel' (use
channel indices), 'frequency' (use frequency unit, e.g., 'GHz'),
and 'velocity' (use velocity unit, e.g., 'km/s'). By default, nchan,
start, and width are defined so that all selected spectral windows are
covered with the channel width equal to separation of first two
Finally, polarizations of image is defined by stokes parameter or
polarization. For example, stokes='XXYY' produces an image cube with
each plane contains the image of one of the polarizations, while
stokes='I' produces a 'total intensity' or Stokes I image.
The stokes parameter has a special option, 'pseudoI'. The option is
introduced to support imaging of partially flagged correlations.
Main difference between 'I' and 'pseudoI' is that the former only takes
into account the data whose correlations are all valid (this is the
Stokes I in the strict sense) while the latter accumulates partially
flagged data in addition. Note that the 'pseudoI' option is compatible
with 'I' for sdimaging task.
The task also supports various grid function (convolution kernel) to
weight spectra as well as an option to remove the most extreme minimum
and maximum (unweighted) values prior to computing the gridded pixel
values. See description below for details of gridfunction available.
<param type="pathVec" name="infiles" mustexist="true"><shortdescription>a list of names of input SD Measurementsets (only MS is allowed for this task)</shortdescription><description>a list of names of input SD Measurementsets (only MS is allowed for this task)</description>
<param type="string" name="outfile"><shortdescription>prefix of output images (.image, .weight, .sumwt, .psf)</shortdescription><description>prefix of output images (.image, .weight, .sumwt, .psf)</description>