Keywords: imager

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### On the CASA side

The proper exportation is done by invoking the `casagildas()` tool. 3. `casagildas()` scans the Measurement Set using the `listobs()` tool, then uses a Python script that parses the output of `listobs()` to prepare a Python script named `casa_uvfits.py`.

It is then up to the user to execute this Python script, using the `casagildas("Do")` command that creates one UVFITS file per Source and Spectral window in the input Measurement Set. Thus, the sequence

      vis='MyMeasurementSet.ms'   # Setup the input Measurement Set filename
      casagildas()                # List its content and create the export script
      casagildas("Do")            # Execute the export script

will create a set of

      Source-Frequency.uvfits

files, where `Source` is the source name and `Frequency` is the central frequency of the spectral window in MHz, for all combinations of sources and spectral windows.