listobs – List the summary of a data set in the logger or in a file – information task

Description

List the summary information of a data set in the logger or in a file, based on a data selection. Only rows can be selected and printed. No in-row selection is possible (channel or correlation).

Lists the following properties of a measurement set: scan list, field list, spectral window list with correlators, antenna locations, ms table information.

Parameters

Title
Parameter	Default	Description
vis	`''`	Name of input visibility file (MS)
selectdata	`True`	Data selection parameters
spw	`''`	Selection based on spectral-window/frequency/channel.
field	`''`	Selection based on field names or field index numbers. Default is all.
antenna	`''`	Selection based on antenna/baselines. Default is all.
uvrange	`''`	Selection based on uv range. Default: entire range. Default units: meters.
timerange	`''`	Selection based on time range. Default is entire range.
correlation	`''`	Selection based on correlation. Default is all.
scan	`''`	Selection based on scan numbers. Default is all.
intent	`''`	Selection based on observation intent. Default is all.
feed	`''`	Selection based on multi-feed numbers: Not yet implemented
array	`''`	Selection based on (sub)array numbers. Default is all.
observation	`''`	Selection based on observation ID. Default is all.
verbose	`True`	Controls level of information detail reported. True reports more than False.
listfile	`''`	Name of disk file to write output. Default is none (output is written to logger only).
listunfl	`False`	List unflagged row counts? If true, it can have significant negative performance impact.
cachesize	`float(50)`	EXPERIMENTAL. Maximum size in megabytes of cache in which data structures can be held.
overwrite	`False`	If True, tacitly overwrite listfile if it exists.

Parameter Explanations

vis

''

Name of input visibility file (MS)

selectdata

True

Data selection parameters

spw

''

Selection based on spectral-window/frequency/channel.

field

''

Selection based on field names or field index numbers. Default is all.

antenna

''

Selection based on antenna/baselines. Default is all.

uvrange

''

Selection based on uv range. Default: entire range. Default units: meters.

timerange

''

Selection based on time range. Default is entire range.

correlation

''

Selection based on correlation. Default is all.

scan

''

Selection based on scan numbers. Default is all.

intent

''

Selection based on observation intent. Default is all.

feed

''

Selection based on multi-feed numbers: Not yet implemented

array

''

Selection based on (sub)array numbers. Default is all.

observation

''

Selection based on observation ID. Default is all.

verbose

True

Controls level of information detail reported. True reports more than False.

listfile

''

Name of disk file to write output. Default is none (output is written to logger only).

listunfl

False

List unflagged row counts? If true, it can have significant negative performance impact.

cachesize

float(50)

EXPERIMENTAL. Maximum size in megabytes of cache in which data structures can be held.

overwrite

False

If True, tacitly overwrite listfile if it exists.