Support for referenced Measurement Sets

[bmarcote]

The current scripts do not support MS files that contain referenced tables (e.g. when a MS which is a subset of a main one is created but instead of duplicating the tables that remain the same they are still referring to the original ones, avoiding duplicities).

It would require to change the calls to subtables, like:

tb.open(vis + '/ANTENNA')

to use the tb.getkeyword('ANTENNA') command to retrieve the actual location of the table. It would still recover the same behavior for the standard MS. No further changes should be required.

I am aware that in pyrap tables it can all be done directly with e.g. pt.table( pt.table(vis, ...).getkeyword('ANTENNA') ). However, from casac it seems like the tb.getkeyword() function adds (according to its documentation) the string 'Table: ' before the path to the table (e.g. -> 'Table: /data0/marcote/N20C3/n20c3.ms/ANTENNA'). Not sure if there is then an alternate way or it would only require to trim this part of the string.

[kettenis]

Hi Benito,
You did something I didn't anticipate. I'll see if I can find a way to fix this.
Cheers,
Mark