1.3.1.0 ms.testconcatenate

NRAO Home > CASA > CASA Toolkit Reference Manual

ms.testconcatenate - Function

1.3.1 Concatenate only the subtables of two measurement sets excluding the POINTING table (resulting MAIN and POINTING table not useful)

Description

This function acts like ms.concatenate() with handling==3 (do not concatenate the MAIN and POINTING tables). This is useful for generating, e.g., SPECTRAL_WINDOW and FIELD tables which contain all used SPW and FIELD ids for a set of MSs without having to actually carry out a time-consuming concatenation on disk. The MAIN table in the resulting output MS is that of the original MS, i.e. it is not touched.

Arguments


Inputs
msfile	The name of the measurement set from which the subtables should be appended
	allowed:	string
	Default:
freqtol	Frequency difference within which 2 spectral windows are considered similar; e.g ’10Hz’
	allowed:	any
	Default:	variant 1Hz
dirtol	Direction difference within which 2 fields are considered the same; e.g ’1mas’
	allowed:	any
	Default:	variant 1mas
respectname	If true, fields with a different name are not merged even if their direction agrees
	allowed:	bool
	Default:	false

Returns
bool

Example

      tb.open("3C273XC1.MS")
      tb.copy("TEMP.MS", norows=True)
      tb.close()
      ms.open("TEMP.MS", nomodify=False)
      ms.testconcatenate("3C273XC1.ms", ’1GHz’, ’1arcsec’)
      ms.testconcatenate("BLLAC.ms", ’1GHz’, ’1arcsec’)
      ms.done()

    This example makes a copy of the structure of an MS and then
    appends the subtables data from two  measurement sets to the empty structure.
    Its going to assume a frequency tolerance of 1GHz and position tolerance
    of 1 arcsec in deciding if the spw and field in the measurementsets are
    similar or not.

__________________________________________________________________

[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