Loading Data into CASA

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1.6.1 Loading Data into CASA

The key data and image import tasks are:

importuvfits — import visibility data in UVFITS format (§ 2.2.4);
importvla — import data from VLA that is in export format (§ 2.2.3);
importasdm — import ALMA data in ASDM format (§ 2.2.1);
importevla — import JVLA/EVLA data in SDM format (§ 2.2.2);
importfits — import a FITS image into a CASA image format table (§ 6.16).

These are used to bring in your interferometer data, to be stored as a CASA Measurement set (MS), and any previously made images or models (to be stored as CASA image tables).

The data import tasks will create a MS with a path and name specified by the vis parameter. See § 1.5.3 for more information on MS in CASA. The measurement set is the internal data format used by CASA, and conversion from any other native format is necessary for most of the data reduction tasks.

Once data is imported, there are other operations you can use to manipulate the datasets:

concat — concatenate a second MS into a given MS (§ 2.2.10)

Data import, export, concatenation, and selection detailed in Chapter 2.

   1.6.1.1 VLA: Filling data from VLA archive format
   1.6.1.2 Filling data from UVFITS format
   1.6.1.3 Loading FITS images
   1.6.1.4 Concatenation of multiple MS

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