sdscale

NRAO Home > CASA > CASA Cookbook and User Reference Manual

8.2.1.15 sdscale

Keyword arguments:
infile -- name of input SD dataset
antenna -- antenna name or id (only effective for MS input).
factor -- scaling factor. float or one- or two-dimensional float list.
          default: 1 (no scaling)
scaletsys -- scaling of associated Tsys
            default: True
outfile -- output file name
           outfile=’’ will write the data to a file named,
           <infile>_scaled<factor>
           default: ’’
overwrite -- overwrite the output file if already exists
        options: (bool) True,False
        default: False

DESCRIPTION:

Task sdscale performs scaling of single-dish spectra. By setting scaletsys = True, associated Tsys is also scaled. Tsys information are written into the file ’sdscale.log’ as well as they are displayed in the terminal window. The infile can be any of ASAP, MS, SDFITS, or RPFITS format. If outfile name is given or outfile=’’(default), the scaled data is written to a new file with the same format as the input data (Note: in case of the RPFITS format input data, it will be written to SDFITS format).

The scaling factor, factor, accepts both scalar type and list type value. The list must be one or two dimensional. If factor is one dimensional, its length must coincide with a number of spectral channel. If factor is two dimensional, its shape must be (n,1) or (n,m), where n is a number of spectrum, while m is a number of channel for each spectrum. m can be variable for each spectrum. In addition, the factor can be an ASCII filename that stores a space-separated list of scaling factor consisting of adequate number of rows and columns. For example, if the content of input ASCII file is shown as,

0.5 0.3 0.2
1.0 0.2 0.9

it is interpreted as a list [[0.5,0.3,0.2],[1.0,0.2,0.9]].

See the sdcal description for note on GBT raw SDFITS format data.

[next] [prev] [prev-tail] [front] [up]

More information about CASA may be found at the CASA web page

This code is available under the terms of the GNU General Public Lincense