Subject: Re: SMA MIRIAD Bug Report
From: Jun-Hui Zhao <jzhao@cfa.harvard.edu>
Date: 09/21/2012 03:49 PM
To: hchen@phys.nthu.edu.tw
CC: smamiriad@cfa.harvard.edu

Hi Vivien,
     Thanks for calling for the IDL programmer meeting.
The invert problem described in your bugReport is related
to the INCONSISTENCES between IDL output and Miriad output
discussed in today's meeting.

In the SMA beta Miriad for debugging, we have a subroutine
to check the header variables and stop further processing if
problematic variables are detected. One can diable this
function if has confidence in his/her uvdata. The same issues
have been raised by other IDL users
(http://www.cfa.harvard.edu/sma/miriad/download/QandA/GlenPetitpas2012jun28.html).
Here is the usage of invert,

invert vis=grb_u.uv,grb_l.uv options=systemp,nochk cell=0.2 imsize=256
sup=0 map=grb.map beam=grb.beam

    Jun-Hui


On Fri, 21 Sep 2012, Jun-Hui Zhao wrote:

Dear Vivien,
    Thank you for submitting bug report via SMA software
bugReport system. The problems that you described below
were reported by Eric Keto. In genral, the problems were
caused by inconsistence in software management; we have responded
Eric Keto,
http://www.cfa.harvard.edu/sma/miriad/download/QandA/eketo5sep2012.html.
Within an half hour, we will have IDL programmers' meeting to
discuss the IDL problems and find a way to solve them,
http://www.cfa.harvard.edu/sma/miriad/download/userMtg/IDLpMtg12-09-21Agenda.html
     Regards.
     Jun-Hui

On Wed, 19 Sep 2012 hchen@phys.nthu.edu.tw wrote:

Below is the result of the form submission.  It was submitted by
 (hchen@phys.nthu.edu.tw) on Wednesday, September 19, 2012 at 12:30:08
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Logging to SMAMBugRpt

Bug Tracking No 	 28

User_Name: Vivien

Report_Type: Bug

Severity: Major

Priority: Medium

Linux: CentOS

Linux_Other:

Linux_Ver: 2.6.18

Kernel:

Hardware: intel

Occured_When: Task

Occured_Notes: uvflag: beta 09-Jan-10 Invert: version 1.1 27-Jun-2012

Description: Polarization data: 120809_03:14:49 (4GHz)
Visibilities are generated from IDL/MIR.  Several issues:
1. uvflag with edge keyword leads to Segmentation fault.
2. invert halts without error messages, eventually quit with no outputs.  However, miriad4 from the carma repository seems to work (built with option --with-telescope=sma).

====  Comparison case of polarization data 070810_05:07:05 (2GHz only passband) using smalod to generate visibilities works well with either the SMA beta version or the carma repository version

Terminal: Invert: version 1.1 27-Jun-2012
Reading the visibility data ...
Applying gain corrections to vislair.wide/w3irs5.lsb
Applying polarization leakage corrections to vislair.wide/w3irs5.lsb
Making single plane images
Visibilities accepted: 446
Sidelobe suppression area is 0x0 arcsec
 ... this corresponds to natural weighting
Applying the weights ...
Theoretical rms noise: 3.627E-03
...


Supplied_Code:

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