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calibrater.listcal - Function

2.1.1 List the contents of a calibration table


Description

calibrater.listcal() lists antenna gain solutions in tabular form. The table is organized as follows. Solutions are output by

  1. Spectral window,
  2. Antenna,
  3. Time,
  4. Channel,
  5. and Polarization.

The inner-most loop is over polarization. A “Spw Header” row is printed each time the spectral window changes. In addition to listing the spectral window ID (SpwID), the Spw Header also lists the date of observation (Date), the calibration table name (CalTable), and the measurement set name (MS name). A lower-level “antenna header” is printed each time the antenna names change or every ‘pagerows’ of output, whichever comes first. The antenna header column are described here:

Column NameDescription
Ant Antenna name
Time Visibility timestamp corresponding to gain solution
Field Field name
Chn Channel number
Amp Complex solution amplitude
Phs Complex solution phase
F Flag

Elements of the “F” column contain an ‘F’ when the datum is flagged, and ‘ ’ (whitespace) when the datum is not flagged.

Presently, the polarization mode names (for example: R, L) are not given, but the ordering of the polrization modes (left-to-right) is equivalent to the order output by task listobs (see “Feeds” in listobs output).

Arguments

Inputs

caltable

Calibration table to list

allowed:

string

Default:

field

Field names or indices to list: ”==>all

allowed:

any

Default:

variant

antenna

Antenna/Baseline to list: ”==>all

allowed:

any

Default:

variant

spw

Spectral windows and channels: ”==>all, spw=’10:8~20’

allowed:

any

Default:

variant

listfile

Send output to file: ”==>send to terminal)

allowed:

string

Default:

pagerows

Rows per page

allowed:

int

Default:

50

Returns
bool

Example

 
 
 
Input:  
 
The following example imports a UVFITS file, performs a bandpass calibration,  
and displays a subset of the resulting calibration table.  
 
pathname=os.environ.get(’CASAPATH’).split()[0] # Get path to CASA home dir  
fitsdata=pathname+’/data/demo/NGC5921.fits’ # Select uv-data (FITS) file  
msdata=’NGC5921.ms’ # MS name; write to current directory  
importuvfits(fitsfile=fitsdata, vis=msdata) # import FITS data to MS  
setjy(vis=msdata) # Create model data for flux calibrator  
caldata=msdata+’.bcal’ # Calibration table name  
bandpass(vis=msdata, caltable=caldata) # Bandpass calibration  
cb.open(msdata) # Open MS in cb  
cb.listcal(caltable=caldata, field=’N5921_2, 0, 1’, antenna=’1~5;10~13;20~22’, spw=’0:4~6’, pagerows=0) # List a subset of calibration factors  
 
Output:  
 
SpwID = 0, Date = 1995/04/13,  CalTable = NGC5921.ms.bcal (B Jones), MS name = /users/jcrossle/NRAO/casa/NGC5921.ms  
-------------------------------------------------------------------------------------------------------------------------------------------------------  
                              | Ant = 1                     | Ant = 2                     | Ant = 3                     | Ant = 4                     |  
Time       Field           Chn|  Amp    Phs F   Amp    Phs F|  Amp    Phs F   Amp    Phs F|  Amp    Phs F   Amp    Phs F|  Amp    Phs F   Amp    Phs F|  
----------|---------------|---|--------------|--------------|--------------|--------------|--------------|--------------|--------------|--------------|  
09:21:46.0 1331+30500002_0   4|0.294    5.3   0.264    3.5   0.296  105.9   0.287 -111.9   0.276  -66.0   0.264  -24.5   0.269  165.8   0.281 -108.6  
09:21:46.0 1331+30500002_0   5|0.303    5.3   0.279    0.6   0.305  107.0   0.298 -111.6   0.283  -64.2   0.274  -23.3   0.280  166.8   0.291 -108.9  
09:21:46.0 1331+30500002_0   6|0.307    5.6   0.287   -1.6   0.309  107.5   0.303 -111.5   0.287  -63.2   0.280  -22.6   0.284  167.8   0.296 -108.8  
10:05:27.9 1445+09900002_0   4|0.467    7.6   0.419    2.7   0.473  107.7   0.455 -112.3   0.437  -63.5   0.413  -24.8   0.427  168.2   0.446 -108.8  
10:05:27.9 1445+09900002_0   5|0.472    7.3   0.440    0.0   0.486  109.1   0.471 -111.8   0.451  -62.6   0.436  -23.1   0.435  169.4   0.453 -108.5  
10:05:27.9 1445+09900002_0   6|0.486    8.4   0.453   -2.4   0.482  110.0   0.478 -111.4   0.452  -60.7   0.443  -23.1   0.446  169.6   0.468 -108.6  
10:09:05.3         N5921_2   4|0.082   50.0   0.074   34.7   0.097  -74.5   0.083   54.4   0.070  131.3   0.080  150.7   0.085   81.0   0.095  150.6  
10:09:05.3         N5921_2   5|0.074   62.7   0.084   24.3   0.114  -73.1   0.093   47.3   0.066  119.9   0.069  154.9   0.099   81.2   0.085  147.4  
10:09:05.3         N5921_2   6|0.079   44.4   0.081   21.7   0.092  -66.3   0.101   48.0   0.089  125.6   0.060  154.0   0.099   83.1   0.097  152.7  
                              | Ant = 5                     | Ant = 10                    | Ant = 11                    | Ant = 12                    |  
Time       Field           Chn|  Amp    Phs F   Amp    Phs F|  Amp    Phs F   Amp    Phs F|  Amp    Phs F   Amp    Phs F|  Amp    Phs F   Amp    Phs F|  
----------|---------------|---|--------------|--------------|--------------|--------------|--------------|--------------|--------------|--------------|  
09:21:46.0 1331+30500002_0   4|0.261  -26.0   0.285 -107.1   0.279 -149.5   0.263    2.9   0.274 -102.5   0.257   -7.0   0.289  174.3   0.309 -139.2  
09:21:46.0 1331+30500002_0   5|0.269  -26.1   0.295 -107.2   0.288 -148.8   0.274    2.3   0.283 -100.9   0.271   -6.8   0.307  173.1   0.319 -138.2  
09:21:46.0 1331+30500002_0   6|0.272  -26.1   0.300 -107.0   0.293 -148.7   0.281    2.0   0.287  -99.7   0.280   -6.7   0.312  171.2   0.326 -137.2  
10:05:27.9 1445+09900002_0   4|0.416  -24.0   0.450 -106.4   0.437 -147.3   0.414    3.2   0.433  -99.6   0.412   -6.8   0.456  175.9   0.477 -140.0  
10:05:27.9 1445+09900002_0   5|0.421  -22.6   0.478 -106.1   0.453 -147.4   0.433    2.0   0.453  -98.1   0.433   -6.7   0.481  174.4   0.491 -138.9  
10:05:27.9 1445+09900002_0   6|0.436  -22.7   0.478 -106.7   0.459 -146.6   0.443    2.4   0.457  -97.1   0.450   -7.0   0.486  173.5   0.510 -137.7  
10:09:05.3         N5921_2   4|0.074   95.0   0.085   -4.2   0.083  109.6   0.084 -116.6   0.081   63.2   0.071  131.2   0.050  -55.4   0.083  -27.4  
10:09:05.3         N5921_2   5|0.071   96.8   0.084  -13.7   0.086  104.3   0.100 -116.4   0.099   61.7   0.084  145.1   0.091  -76.1   0.087  -33.6  
10:09:05.3         N5921_2   6|0.082   84.9   0.078   -5.3   0.101  109.1   0.102 -109.9   0.087   60.1   0.107  130.4   0.085  -75.5   0.080  -31.2  
                              | Ant = 13                    | Ant = 20                    | Ant = 21                    | Ant = 22                    |  
Time       Field           Chn|  Amp    Phs F   Amp    Phs F|  Amp    Phs F   Amp    Phs F|  Amp    Phs F   Amp    Phs F|  Amp    Phs F   Amp    Phs F|  
----------|---------------|---|--------------|--------------|--------------|--------------|--------------|--------------|--------------|--------------|  
09:21:46.0 1331+30500002_0   4|0.285 -169.5   0.277  -90.4   0.254  -36.0   0.290   70.9   0.286  -97.8   0.305  108.8   0.273  -84.6   0.224 -124.2  
09:21:46.0 1331+30500002_0   5|0.296 -168.9   0.287  -90.5   0.269  -38.6   0.300   71.0   0.296  -97.8   0.317  108.2   0.284  -85.8   0.243 -127.6  
09:21:46.0 1331+30500002_0   6|0.301 -168.7   0.291  -90.3   0.278  -39.9   0.306   70.9   0.302  -97.8   0.326  107.2   0.289  -86.6   0.255 -129.7  
10:05:27.9 1445+09900002_0   4|0.448 -167.2   0.434  -90.7   0.401  -34.4   0.456   70.8   0.457  -95.5   0.485  108.9   0.431  -82.1   0.361 -123.9  
10:05:27.9 1445+09900002_0   5|0.466 -166.5   0.457  -91.1   0.423  -36.6   0.470   70.8   0.471  -96.6   0.506  108.1   0.448  -83.2   0.393 -126.7  
10:05:27.9 1445+09900002_0   6|0.473 -166.9   0.464  -91.1   0.436  -37.8   0.485   70.2   0.476  -96.6   0.521  108.0   0.447  -83.2   0.410 -130.0  
10:09:05.3         N5921_2   4|0.097   83.0   0.087  143.5   0.080   43.1   0.094  144.2   0.087  168.7   0.092    1.4   0.111   76.1   0.079   18.9  
10:09:05.3         N5921_2   5|0.100   87.4   0.094  137.0   0.061   54.7   0.098  153.3   0.094  178.6   0.096   -3.7   0.101   64.6   0.091    9.5  
10:09:05.3         N5921_2   6|0.099   93.3   0.122  140.5   0.077   51.3   0.090  151.7   0.083 -179.6   0.100    2.2   0.095   61.3   0.108    0.4  
 
Listed 108 antenna solutions.  
 
 
 

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