[daip] AIPS/LION, problems with IMAGR 31DEC12 ?
Jose-Maria Torrelles
chema.torrelles at gmail.com
Mon Jan 9 17:59:13 EST 2012
Dear Eric, we have made some probes. We are making images of four
fields simultaneusly with IMAGR. For our computers in Barcelona (linux
pc, mac) using AIPS DEC11, we use NITER 5000 obtaining good images of
the masers in the four fields. However, in Mexico, using AIPS DEC12,
with the same number of iterations 5000, IMAGR aborts after about 1500
iterations. This is the reason why the image looks completely
different since it is not restoring properly. But we do not understand
why in version DEC12 IMAGR aborts after 1500 iterations if we have the
same data as those using AIPS DEC11 with NITER 5000 and working
properly.
Any idea?
Thank you.
Best regards
Chema
On 1/6/12, Jose-Maria Torrelles <chema.torrelles at gmail.com> wrote:
> Dear Eric, thank you very much. We will do more probes by this monday. At
> moment we have checked all the input parameters from IMAGR and they are
> coincident.
> We will let you know.
>
> Best regards,
>
>
> Chema
> ---------------------------------------------------------------------------------
> José-María Torrelles
> Instituto de Ciencias del Espacio (CSIC)-UB/IEEC
> DAM, Facultat de Física, Planta 7a, Universitat de Barcelona
> C/ Martí i Franquès 1
> 08028 Barcelona
> ----------------------------------------------------------------------------------
>
> On Jan 6, 2012, at 4:37 PM, Eric Greisen wrote:
>
>> Jose-Maria Torrelles wrote:
>>> Dear AIPS, do you know if AIPS 31DEC12 is working correctly within MAC
>>> Lion systems?
>>> We are producing images in two sites, Mexico and Barcelona. In Barcelona
>>> we have Snow Leopard working with AIPS 31DEC11 producing images
>>> with IMAGR without any problem. However in Mexico with Lion system and
>>> AIPS 31DEC12 we are obtaining images with completely different things. We
>>> know that the spectral channels we are managing
>>> have strong signal (masers), and in fact we are mapping without any
>>> problem those images using Snow Leopard and AIPS 31DEC11 in our mac
>>> computer in Barcelona.
>>> As an example, I give you what IMEAN obtains from the image produced in
>>> Lion (same input parameters) without seeing the signal:
>>> 1 5 03-JAN-2012 17:17:50 IMEAN Image= SCHANEPOCH1 .ICL001.
>>> 303 1 xywind= 1 1 8192 8192
>>> 1 5 03-JAN-2012 17:17:50 IMEAN Mean and rms found by
>>> fitting peak in histogram:
>>> 1 5 03-JAN-2012 17:17:50 IMEAN Mean= 5.7710E-07 Rms=
>>> 6.0268E-03 **** from histogram
>>> 1 5 03-JAN-2012 17:17:50 IMEAN Mean and rms found by
>>> including all data:
>>> 1 5 03-JAN-2012 17:17:50 IMEAN Mean=-5.956E-08 Rms=
>>> 6.035E-03 JY/BEAM over 67108864. pixels
>>> 1 5 03-JAN-2012 17:17:50 IMEAN Flux density = -1.8959E-01
>>> Jy. beam area = 21.08 pixels
>>> 1 5 03-JAN-2012 17:17:50 IMEAN Minimum=-3.6945E-02 at
>>> 8191 2673 1 1
>>> 1 5 03-JAN-2012 17:17:50 IMEAN Skypos: RA 20 29
>>> 24.84505451 DEC 40 11 19.2190997
>>> 1 5 03-JAN-2012 17:17:50 IMEAN Maximum= 3.3348E-02 at
>>> 1707 2 1 1
>>> 1 5 03-JAN-2012 17:17:50 IMEAN Skypos: RA 20 29
>>> 24.90163955 DEC 40 11 18.9520000
>>> 1 5 03-JAN-2012 17:17:50 IMEAN Skypos: IPOL 22236.429
>>> MHZ
>>> 1 3 03-JAN-2012 17:17:50 IMEAN Appears to have ended
>>> successfully
>>>
1 5 03-JAN-2012 17:17:50 IMEAN mac-pro- 31DEC12 TST:
>>> Cpu= 3.4 Real= 6 IO= 512
>>> However, in our computer in Barcelona with Snow Leopard 31DEC11 (and also
>>> PC Linux) we obtain correct things with the maser at 1.7 Jy level seen:
>>> 1 5 04-JAN-2012 10:18:48 IMEAN Task IMEAN (release of
>>> 31DEC11) begins
>>> 1 3 04-JAN-2012 10:18:48 IMEAN Initial guess for PIXSTD
>>> taken from ACTNOISE inheader
>>> 1 3 04-JAN-2012 10:18:48 IMEAN Initial guess for PIXAVG
>>> taken from ACTMEAN inheader
>>> 1 5 04-JAN-2012 10:18:52 IMEAN Image= SCHANEPOCH1 .ICL001.
>>> 303 1 xywind= 1 1 8192 8192
>>> 1 5 04-JAN-2012 10:18:52 IMEAN Mean and rms found by
>>> fitting peak in histogram:
>>> 1 5 04-JAN-2012 10:18:52 IMEAN Mean= 8.5468E-07 Rms=
>>> 5.8542E-03 **** from histogram
>>> 1 5 04-JAN-2012 10:18:52 IMEAN Mean and rms found by
>>> including all data:
>>> 1 5 04-JAN-2012 10:18:52 IMEAN Mean= 2.129E-06 Rms=
>>> 6.012E-03 JY/BEAM over 67108864. pixels
>>> 1 5 04-JAN-2012 10:18:52 IMEAN Flux density = 6.7766E+00
>>> Jy. beam area = 21.08 pixels
>>> 1 5 04-JAN-2012 10:18:52 IMEAN Minimum=-3.8377E-02 at 8191
>>> 2673 1 1
>>> 1 5 04-JAN-2012 10:18:52 IMEAN Skypos: RA 20 29
>>> 24.84505451 DEC 40 11 19.2190997
>>> 1 5 04-JAN-2012 10:18:52 IMEAN Maximum= 1.7877E+00 at 4335
>>> 5202 1 1
>>> 1 5 04-JAN-2012 10:18:52 IMEAN Skypos: RA 20 29
>>> 24.87870534 DEC 40 11 19.4720001
>>> 1 5 04-JAN-2012 10:18:52 IMEAN Skypos: IPOL 22236.429 MHZ
>>> 1 2 04-JAN-2012 10:18:52 IMEAN returns adverbs to AIPS
>>> 1 3 04-JAN-2012 10:18:52 IMEAN Appears to have ended
>>> successfully
>>> In both sites, AIPS was installed with binaries.
>>
>> 31DEC12 is brand new and there should be little or no difference between
>> the 2 versions depending on when the 31DEC12 was installed (or the most
>> recent MNJ run). I have changed some subroutines in ways that should have
>> little or no impact on IMAGR. We have seen no difficulties whatsoever
>> with the transition from Snow Leopard to Lion and in fact the load
>> modules you are using on both computers are computed on a machine with an
>> O/S not even as advanced as Snow Leopard.
>>
>> There are so many things that can be different between the two executions
>> of IMAGR (and even IMEAN) that I can tell very little from this alone.
>> One possibility would be if the IMAGR in Mexico was run with BMAJ < 0
>> which would leave a residual image without the components restored.
>>
>> Try PRTCC on both machines to see if that gives similar results - an
>> IMHEADER might also show interesting information.
>>
>> Eric Greisen
>
>
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