ms.ptsrc - Function

Reports global average of visibilities per field

Synopsis
ptsrc(fldid, spwid)

Arguments

fldid	in	Desired fields
		Allowed:	Vector of integers
		Default:	all
spwid	in	Desired spectral windows
		Allowed:	Vector of integers
		Default:	all

Description
This function averages the data over all (unflagged) times and (non-zero) baselines per field_id and spectral_window_id, and reports the result in the Stokes polarization basis. If present, the CORRECTED_DATA column is averaged; otherwise the DATA column is used, in which case the results might be suspect if this DATA hasn't been calibrated.

For multi-channel data, all channels are currently averaged as well. Future versions of this function will have options for channel selection.

This function is useful for obtaining a full-Stokes point source flux density estimate for polarization calibration or other purposes. It is essentially calculating a single-pixel image at the observation's phase center, which for point sources, yields the correct flux density.

Example

      include 'ms.g'
      myms := ms('ap366.ms'); 
      myms.ptsrc(fldid=[9,11],spwid=1);
      myms.done();

This example calculates the point source flux density for field ids 9 & 11 in spectral window 1.

Next: ms.done - Function Up: ms - Tool Previous: ms.uvlsf - Function Contents Index

	Package	general
	Module	ms
	Tool	ms