[daip] Questions about AIPS Tasks

[Christian Leipski]

Hello!

Thanks for your answer but nothing changes!

Using subarray = 0 (=>all):

IMAGR1: IMACPY: Copied   514615 visibilities to be imaged
IMAGR1: GRDFLT: X and Y convolution type = SPHEROIDAL
IMAGR1: GRDFLT: X and Y parms =  3.0000  1.0000
IMAGR1: GRDFLT: convolution function sampled every 1/100 of a cell
IMAGR1: OUVIMG: Sorting data to make them fit
IMAGR1: GR3DUV: All    306 Rows in  1280k AP (  313 Rows Max)
IMAGR1: GR3DUV: Max U Baseline      595399. lambda (=  297 cells)
IMAGR1: Field   1 fit FWHM =    1.516 x    1.323      arcsec, PA=   -9.5

All visibilities, long baselines, but small beam


Using subarray = 1 (A-Array data):

IMAGR1: IMACPY: Copied   298299 visibilities to be imaged
IMAGR1: GRDFLT: X and Y convolution type = SPHEROIDAL
IMAGR1: GRDFLT: X and Y parms =  3.0000  1.0000
IMAGR1: GRDFLT: convolution function sampled every 1/100 of a cell
IMAGR1: OUVIMG: Sorting data to make them fit
IMAGR1: GR3DUV: All    306 Rows in  1280k AP (  313 Rows Max)
IMAGR1: GR3DUV: Max U Baseline      595399. lambda (=  297 cells)
IMAGR1: Field   1 fit FWHM =  561.087 x  454.141 Milliarcsec,PA=   37.9

Using subarray = 2 (B-Array data):

IMAGR1: IMACPY: Copied   216316 visibilities to be imaged
IMAGR1: GRDFLT: X and Y convolution type = SPHEROIDAL
IMAGR1: GRDFLT: X and Y parms =  3.0000  1.0000
IMAGR1: GRDFLT: convolution function sampled every 1/100 of a cell
IMAGR1: OUVIMG: Sorting data to make them fit
IMAGR1: GR3DUV: All    100 Rows in  1280k AP (  313 Rows Max)
IMAGR1: GR3DUV: Max U Baseline      180928. lambda (=   91 cells)
IMAGR1: Field   1 fit FWHM =    1.572 x    1.359      arcsec,PA=  -11.2


You can see that if subarray is set to 0, IMAGR finds all visibilities AND
a maximum (U) baseline length corresponding to the A-Array data, but
restores a B-Array beam.....

What else should I check?


Best regards
Christian


On Tue, 13 Jan 2004, Eric Greisen wrote:

> Christian Leipski writes:
>
>  > 1)
>  > I've got data from the VLA A- AND B-Array (6 cm, of the same source and
>  > individually calibrated, of
>  > course) and would like to concatenate this two files. If I do this with DBCON
>  > and them make a image using MAPPR, AIPS find all the visibilities but restores
>  > the beam only on the basis of B-Array data (with a beam of roughly 1.3
>  > x 1.3 arcsec). What task do I have to use to merge the uv datasets
>  > properly ?
>
>     MAPPR is a simplified interface to IMAGR.  Do a TGET IMAGR and see
> if it has set SUBARRAY to 1.  The DBCON'd data are probably in two
> subarrays and both must be included by the IMAGR.
>  >
>  >
>  > 2)
>  > After I loaded the data of another file to AIPS, I can't run TVFLG on
>  > this dataset.
>  > Having a look on the scan summary (see attachement) you see that the scans
>  > numbered 1 to 11 are the same as approximately 43 to ... .
>  > Thus, the data are partly the same and I have to delete the scans 1 to 11.
>  > Which task should I use to delete certain SCANS??
>  >
>  >
>  > Thanks in advance
>  >
>  > Best regards
>  >
>  > Christian
>  >
>  >
>