[daip] [forwarded] Problem related to AIPS - Your kind help required.

[Eric Greisen]

Patrick P Murphy wrote:
> A blast from the past...
> 
> ------- start of forwarded message -------
> From: indrajit <indrajit at iiap.res.in>
> To: pmurphy at nrao.edu
> Subject: Problem related to AIPS - Your kind help required.
> Date: Mon, 19 Nov 2012 16:13:14 +0530
> 
> Dear Dr. Murphy,
> 
>                             This is Indrajit from the Solar Radio 
> Astronomy Group in Indian Institute of Astrophysics  Bangalore. 
> Presently I am involved in the process of converting raw visibility data 
> (UV data) obtained with the Gauribidanur RadioHeliograph 
> (http://www.iiap.res.in/centers/radio). To identify and flag the bad 
> antennas I want to use the task VPLOT in AIPS. While doing so I am 
> facing some problems which I have mentioned below. I would appreciate 
> your kind help and guidance in overcoming this problem.
> 
> Thank You.
> 
> Regards,
> 
> Indrajit.
> 
> PS:
> 
> The attached file contains observations on two calibrator sources 
> Cygnus-A and Tau-A during their transit over Gauribidanur.
> ---------------------------
> 
> In our case we have ANTENNAS=64.
> 
> ********************************************************
> 
> VPLOT1: Task VPLOT  (release of 31DEC11) begins
> VPLOT1: ANREFM: NO ANTENNA OR ARRAY RECOGNIZED
> VPLOT1: TABINI: REQUESTED AN FILE *** DOES NOT EXIST
> VPLOT1: ANINI: ERROR   2 FROM TABINI OPCODE = READ
> VPLOT1: ANINI: ERROR   2 INITIALIZING ANTENNA TABLE FOR READ
> VPLOT1: GETANT: ERROR  2 OPEN-FOR-READ AN FILE
> VPLOT1: TABINI: REQUESTED AN FILE *** DOES NOT EXIST
> VPLOT1: ANINI: ERROR   2 FROM TABINI OPCODE = READ
> VPLOT1: ANINI: ERROR   2 INITIALIZING ANTENNA TABLE FOR READ
> VPLOT1: ANTIN: ERROR IN OPEN AN-FILE IERR =      2
> VPLOT1: Purports to die of UNNATURAL causes
> VPLOT1: indrajit     31DEC11 TST: Cpu=       0.0  Real=       0
> AIPS 1: Resumes
> ****************************************************************
> (attachment 1 saved to
>  https://staff.nrao.edu/homes/pmurphy/GRHx_20121017_CYG_CRA.fits.zip )
> (attachment 2 saved to
>  https://staff.nrao.edu/homes/pmurphy/Array_extension.jpg )
> ------- end of forwarded message -------
> 

Thank you for your detailed bug report submission.  In future, could you 
send them to daip at nrao.edu since Pat no longer works in the aips group?

You have turned up a series of bugs since your array has more than 50 
antennas while some of our adverb arrays are limited to 50.  I have 
corrected the 31DEC12 version of aips in VPLOT and some of the low level 
calibration routines to handle larger telescope arrays properly.  I am 
uncertain about making the same corrections to 31DEC11 at this late date 
(31DEC11 will become unavailable for new installations in ~3-4 weeks).

Regards,

Eric Greisen