Where are my data in CASA?

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1.5.3 Where are my data in CASA?

Interferometric data are filled into a so-called Measurement Set (or MS). In its logical structure, the MS looks like a generalized description of data from any interferometric or single dish telescope. Physically, the MS consists of several tables in a directory on disk.

Tables in CASA are actually directories containing files that are the sub-tables. For example, when you create a MS called AM675.ms, then the name of the directory where all the tables are stored will be called AM675.ms/. See Chapter 2 for more information on Measurement Set and Data Handling in CASA.

The data that you originally get from a telescope can be put in any directory that is convenient to you. Once you ”fill” the data into a measurement set that can be accessed by CASA, it is generally best to keep that MS in the same directory where you started CASA so you can get access to it easily (rather than constantly having to specify a full path name).

When you generate calibration solutions or images (again these are in table format), these will also be written to disk. It is a good idea to keep them in the directory in which you started CASA.

1.5.3.1 How do I get rid of my data in CASA?

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