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| NRAO Home > CASA > TaskRef |
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Requires:
Synopsis List measurement set visibilities.
Description
This task lists measurement set visibility data under a number of input
selection conditions. The measurement set data columns that can be listed are:
the raw data, corrected data, model data, and residual (corrected - model)
data.
The output table format is dynamic. Field, Spectral Window, and Channel columns are not displayed if the column contents are uniform. For example, if ”spw = ’1’” is specified, the spw column will not be displayed. When a column is not displayed, a message is sent to the logger and terminal indicating that the column values are uniform and listing the uniform value.
Table column descriptions:
COLUMN NAME DESCRIPTION ———– ———– Date/Time Time stamp of data sample Intrf Interferometer baseline (antenna names) UVDist uv-distance (units of wavelength) Fld Field ID (if more than 1) SpW Spectral Window ID (if more than 1) Chn Channel number (if more than 1) (Correlated Correlated polarizations (eg: RR, LL, XY) polarization) Sub-columns are: Amp, Phs, Wt, F Amp Visibility amplitude Phs Visibility phase (deg) Wt Weight of visibility measurement F Flag: ’F’ = flagged datum; ’ ’ = unflagged
Input Parameters: vis Name of input visibility file default: none; example: vis=’ngc5921.ms’
options List options: default = ’ap’ Not yet implemented for suboptions
datacolumn Visibility file data column: default = ’data’: options are data, corrected, model, residual (corrected-model)
field Select data based on field id(s) or name(s) default: ”==¿all; example: field=’1’ field=’0 2’ field ids inclusive from 0 to 2 field=’3C*’ all field names starting with 3C
spw Select spectral window, channel to list default: ’0:0’ –¿ spw=0, chan=0 spw=’2:34’ spectral window 2, channel 34
selectdata Toggle the following 7 selection parameters. default: False; example: selectdata=True If false, the following parameters are reset to default values.
antenna Select calibration data based on antenna default: ”–¿all; examples: antenna = ’5,6’; antenna index 5 and 6 solutions antenna = ’05,06’; antenna names ’05’ and ’06 solutions
timerange Select time range to list default: ”–¿all; examples: timerange=’10:37:50.1’; list data for this sampling interval timerange=’¡10:37:25’; list data before 10:37:25
correlation Select polarization correlations to list default: ”–¿all; examples: correlation=’RR LL’; list RR and LL correlations correlation=’XX XY’; list XX and XY correlations
scan Select scans to list default: ”–¿all; examples: scan=’2’; list scan 2 scan=’¿2’; list scan numbers greater than 2
feed (not yet implemented)
array (not yet implemented)
uvrange Select baseline lengths to list. default: ”–¿ all; examples: uvrange=’¡5klambda’; less than 5 kilo-wavelengths Caution: Input units default to meters. Listed units are always wavelengths.
average (not yet implemented)
showflags (not yet implemented)
pagerows rows per page of listing default: 50; 0 –¿ do not paginate
listfile write output to disk; will not overwrite default: ” –¿ write to screen listfile = ’solutions.txt’
async Run asynchronously default = False; do not run asychronously
Arguments
| Inputs |
| ||
| vis |
| Name of input visibility file
| |
| allowed: | string |
|
| Default: |
| |
| options |
| List options: ap only
| |
| allowed: | string |
|
| Default: | ap |
|
| datacolumn |
| Column to list: data, corrected, model, residual
| |
| allowed: | string |
|
| Default: | data | |
| field |
| Field names or index to be listed: ”==¿all
| |
| allowed: | string |
|
| Default: |
| |
| spw |
| Spectral window:channels: ’’==¿all, spw=’1:5 57’
| |
| allowed: | string |
|
| Default: | * | |
| selectdata |
| Other data selection parameters
| |
| allowed: | bool | |
| Default: | False |
|
| antenna |
| Antenna/baselines: ”==¿all, antenna = ’3’
| |
| allowed: | string |
|
| Default: |
| |
| timerange |
| Time range: ”==¿all
| |
| allowed: | string |
|
| Default: |
| |
| correlation |
| Correlations: ”==¿all, correlation = ’RR RL’
| |
| allowed: | string |
|
| Default: |
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| scan |
| Scan numbers
| |
| allowed: | string |
|
| Default: |
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| feed |
| Multi-feed numbers (Not yet implemented)
| |
| allowed: | string |
|
| Default: |
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| array |
| Array numbers (Not yet implemented)
| |
| allowed: | string |
|
| Default: |
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| uvrange |
| uv range: ”==¿all; not yet implemented
| |
| allowed: | string |
|
| Default: |
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| average |
| Averaging mode: ”==¿none (Not yet implemented)
| |
| allowed: | string |
|
| Default: |
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| showflags |
| Show flagged data (Not yet implemented)
| |
| allowed: | bool |
|
| Default: | False |
|
| pagerows |
| Rows per page
| |
| allowed: | int |
|
| Default: | 50 |
|
| listfile |
| Output file
| |
| allowed: | string |
|
| Default: |
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Example
Please send any comments or questions about CASA or AIPS++ to aips2-requests@nrao.edu
Copyright © 2008 Associated Universities Inc., Washington, D.C.
This code is available under the terms of the GNU General Public Lincense
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Updated daily during alpha development.