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	`''`
selectdata	`True`
spw	`''`
field	`''`
antenna	`''`
uvrange	`''`
timerange	`''`
correlation	`''`
scan	`''`
intent	`''`
feed	`''`
array	`''`
observation	`''`
verbose	`True`
listfile	`''`
listunfl	`False`
cachesize	`float(50)`
overwrite	`False`

Parameter Explanations

vis

''

Name of input visibility file (MS)

selectdata

True

Data selection parameters

spw

''

spectral-window/frequency/channel

field

''

Field names or field index numbers: ''==>all, field='0~2,3C286'

antenna

''

antenna/baselines: ''==>all, antenna ='3,VA04'

uvrange

''

uv range: ''==>all; uvrange ='0~100klambda', default units=meters

timerange

''

time range: ''==>all,timerange='09:14:0~09:54:0'

correlation

''

Select data based on correlation

scan

''

scan numbers: ''==>all

intent

''

Select data based on observation intent: ''==>all

feed

''

multi-feed numbers: Not yet implemented

array

''

(sub)array numbers: ''==>all

observation

''

Select data based on observation ID: ''==>all

verbose

True

listfile

''

Name of disk file to write output: ''==>to terminal

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.