[daip] FITLD problem
Amy Mioduszewski
amiodusz at nrao.edu
Thu Aug 28 12:30:38 EDT 2008
Hi Gabi,
It sounds like it is an issue with the 64 bit machine. I'll ask our local
experts about that. But still you should examine your FG table and see if the
flags for IF2 are corrupted in some way.
Amy
gcastell at iafe.uba.ar wrote:
> Hi Amy,
>
> I'm glad you answered my e-mail!
> It's so extrange... I'am procesing low radio frequency data (4P) and as you
> know the data base is really great. In order to make things fast, I work in
> two machines. One is in my office and the other one is at home. There is
> no problem between this two machines (both of them have installated
> the last AIPS version). I mean, I use FITTP to create a FITS in my office
> and then I use FITLD at home to store that FITS. I have not problem at
> this point. The uv plot are the same in both machines.
>
> The others days a new machine was finished to be used in my group. This
> would be a "third" machine in which I could run CALIB and IMAGR faster
> than at home... So, I stored my FITS file in this third machine (AIPS
> 31DEC08 also) and then use UVPLT and WIPER to see my uv data.
> The data have two sidebands, I have no problem if I select bif 1 and eif 1
> in UVPLT, ie, I see the same UV plot as at home and in my office.
> The problem is with bif 2 and eif 2. The plot in this third machine is
> completely different from that I see at home or in my office
> (I using the same parameters, of course).
>
> At the begining I thought that the problem was that the machines at home
> and in my office are 32 bits, while the third machine is 64 bits. All the
> machines use Debian.
> The other days the system manager in my institute did something (I don't
> know what) and he installated AIPS in the 64 bits
> machine as it would be a 32 bits installation. But, unfortunately the
> problem is still there: I cannnot see the uv plot for IF2. It looks as
> the flags would not be applied. My question is: why using the same
> parameters in FITLD, UVPLT, WIPER I can see a good uv plot for the IF2 in
> both, the machine at home and in my office??? What is wrong with the 64 bits
> machine???
>
> Of course, I will try with your suggestion...
>
> thanks a lot for your attention!
> cheers!
> Gabi
>
>
> PS. Please, take note that this is not the first time that I am working
> with low radio frequency data using AIPS. This is the first time, however,
> that I have not any idea about how to make in order the things work well!
>
>> Hi Gabi,
>>
>> I doubt this is a FITLD problem. Could you do a TASAV on your file and
>> send the
>> saved tables to me. I want to check out the FG table. Also, how do you
>> know
>> for sure that the flags are not being applied to IF2?
>>
>> Amy
>>
>> gcastell at iafe.uba.ar wrote:
>>> Dear all,
>>>
>>> I am processing data using 31DEC08 version. I have installated this
>>> version
>>> using Debian 3.1 with a compilator GCC3.X.
>>> I use FITLD to store my uv file which has two IF and 1 FG table. The
>>> problem is that when I plot the data using UVPLT, AIPS only seems to see
>>> the flags made on IF-1. Of course the FG table also includes a lot of
>>> flags for IF-2, but this is not taken into account when I plot the uv
>>> data
>>> with bif 2 eif 2 flagver 1. I don't understand what is wrong! I will be
>>> very gratefull if you could help me with this.
>>>
>>> thank you very much!
>>> Gabi
>>>
>>>
>>> The inputs used in FITLD were
>>>
>>> INTAPE 1 Input tape drive # (0 => 1)
>>> AIPS 2: NFILES 0 # of files to advance on tape
>>> AIPS 2: INFILE 'FITS:IC443/AG697/IC443 Disk file name
>>> AIPS 2: -4AB.SPLIT.1.FITS'
>>> AIPS 2: OUTNAME 'IC443-4AB' File name (name)
>>> AIPS 2: OUTCLASS 'SPLIT' File name (class)
>>> AIPS 2: OUTSEQ 0 File name (seq. #)
>>> AIPS 2: 0 => highest unique number
>>> AIPS 2: => matching (on VLBA)
>>> AIPS
>>> 2: -1 => FITS tape value AIPS 2:
>>> OUTDISK 4 Disk drive # (0 => any) AIPS 2:
>>> OPTYPE
>>> ' ' Type of data to load,
>>> AIPS 2: ' ' => all types
>>> AIPS 2: 'UV' => UV data
>>> AIPS 2: 'IM' => images
>>> AIPS 2: NCOUNT 1 Number of files to load. AIPS
>>> 2: DOTABLE 1 True (1.0) means load tables AIPS
>>> 2:
>>> for images.
>>> AIPS 2: DOUVCOMP -1 >0 => compressed data (FITS)
>>> AIPS 2: DOCONCAT -1 >0 -> if VLBA or uv table,
>>> AIPS
>>> 2: append data to existing AIPS 2:
>>> files, or if no appropriate AIPS 2:
>>> files exist create a new file AIPS 2:
>>> and append all data to that AIPS 2:
>>> file.
>>> AIPS 2: *****************************
>>> AIPS 2: Following adverbs are useful
>>> AIPS 2: only when reading VLBA
>>> AIPS 2: distribution tapes.
>>> AIPS 2: *****************************
>>> AIPS 2: CLINT 0 CL entry interval (min) AIPS
>>> 2:
>>> 0 => 1 minute.
>>> AIPS 2: SOURCES *all ' ' Source list to accept.
>>> AIPS 2: QUAL -1 Source qualifier -1=>all AIPS
>>> 2: TIMERANG *all 0 Timerange selected
>>> AIPS 2: BCHAN 0 Lowest spectral channel AIPS
>>> 2:
>>> number to select in each IF. AIPS 2:
>>> 0=>1
>>> AIPS 2: ECHAN 0 Highest spectral channel AIPS
>>> 2: number to select in each IF. AIPS
>>> 2:
>>> 0=>highest
>>> AIPS 2: BIF 1 Lowest IF number 0=>1
>>> AIPS 2: EIF 2 Highest IF number 0=>all AIPS
>>> 2: DIGICOR 1 Controls the application of AIPS
>>> 2:
>>> the VLBA correlator's digital AIPS 2:
>>> correction.
>>> AIPS 2: 0 or 1 => perform corrections
>>> AIPS 2: 2 => perform cross-power AIPS
>>> 2: corrections, do total-power AIPS
>>> 2: only if zero padding used. AIPS
>>> 2:
>>> -1 => do NOT perform
>>> AIPS 2: corrections.
>>> AIPS 2: SEE HELP for more details
>>> AIPS
>>> 2: SELBAND -1 Bandwidth to select (kHz) AIPS 2:
>>> SELFREQ -1 Frequency to select (MHz). AIPS 2:
>>> See HELP.
>>> AIPS 2: FQTOL -1 Frequency tolerance assigned
>>> AIPS 2: to SELFREQ, FITLD will select
>>> AIPS 2: data with freq. of SELFREQ
>>> AIPS
>>> 2: +/- FQTOL.
>>> AIPS 2: The unit of FQTOL is kHz.
>>> AIPS
>>> 2: <=0 => 10 kHz
>>> AIPS 2: WTTHRESH 0 Flagging threshold based on
>>> AIPS 2: weights. See HELP.
>>> AIPS 2: 0 => no flagging
>>> AIPS 2: 1 => will flag ALL data AIPS
>>> 2:
>>> OPCODE ' ' Specify if wish to keep VT AIPS 2:
>>> (VLBA Tape Statistics) table AIPS 2:
>>> and other tables. See HELP. AIPS 2:
>>> ' ' => do not save tables AIPS 2: NPIECE
>>> 0
>>> Maximum uv table piece to AIPS 2: ERROR 1
>>> >= 2 -> do not use AIPS AIPS 2:
>>> history in the FITS file
>>>
>>>
>>>
>>>
>>>
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>
>
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