[daip] SPLIT problem

[Takayuki HAYASHI]

I tried BPASS again and I found it works well.
(I checked it by using POSSM)
However, it seems that UVCOP doesn't work well.

I used UVCOP to divide the data between IF 1,2 and IF 3,4.
(for polarization analysis)
BP table of the data divided by UVCOP include no information about MK,
both LHCP and RHCP.
The input parameters are below, and could you help me ??

AIPS 1: UVCOP     Task to copy selected times and channels of uv data.
AIPS 1: Adverbs     Values                 Comments
AIPS 1: ----------------------------------------------------------------
AIPS 1: INNAME     '$PROJECT$'             Input UV file name (name)
AIPS 1: INCLASS    'UVCOP'                 Input UV file name (class)
AIPS 1: INSEQ         2                    Input UV file name (seq. #)
AIPS 1: INDISK        1                    Input UV file disk unit #
AIPS 1: OUTNAME    '$PROJECT$'             Output UV file name (name)
AIPS 1: OUTCLASS   'CBAND1'                Output UV file name (class)
AIPS 1: OUTSEQ        1                    Output UV file name (seq. #)
AIPS 1: OUTDISK       1                    Output UV file disk unit #.
AIPS 1: SELBAND      -1                    Bandwidth to select (kHz)
AIPS 1: SELFREQ      -1                    Frequency to select (MHz)
AIPS 1: FREQID       -1                    Freq. ID to select. 0=> all
AIPS 1: BCHAN         1                    First channel selected.
AIPS 1: ECHAN         0                    Last channel selected.
AIPS 1: BIF           1                    Lowest IF number 0=>all
AIPS 1: EIF           2                    Highest IF number 0=>all
AIPS 1: SOURCES    *all ' '                Source list
AIPS 1: QUAL         -1                    Source qualifier -1=>all
AIPS 1: UVRANGE       0           0        Annulus in uv plane selected
AIPS 1:                                     (thousands of wavelengths)
AIPS 1: TIMERANG   *all 0                  Timerange:
AIPS 1:                                     1-4 = start day,hr,min,sec
AIPS 1:                                     5-8 = end   day,hr,min,sec
AIPS 1: ANTENNAS   *all 0                  Antennas to copy 0=>all
AIPS 1: BASELINE   *all 0                  Baselines with ANTENNAS
AIPS 1: SUBARRAY      0                    Limit copy to one subarray
AIPS 1:                                    0 => all.
AIPS 1: FLAGVER       0                    FG table to apply to data
AIPS 1:                                    <= 0 => do not apply
AIPS 1: UVCOPPRM   *all 0                  Flags:
AIPS 1:                                     1 > 0 => keep flagged data
AIPS 1:                                     2 > 0 => drop subarray info
AIPS 1:                                     3 = 0 => copy xc and ac data
AIPS 1:                                       = 1 => copy only xc data
AIPS 1:                                       = 2 => copy only ac data
AIPS 1:                                          of antennas, named in
AIPS 1:                                          antenna list. Baseline
AIPS 1:                                          list must be zero.
AIPS 1:                                     4 > 0 => report progress
AIPS 1:                                     5 => clip data with weights
AIPS 1:                                          below this limit
AIPS 1:                                     6 = 1,3 -> flag TY tables
AIPS 1:                                       = 2,3 -> flag SN tables
AIPS 1: NCOUNT        0                    If UVCOPPRM(3) = 2 then
AIPS 1:                                    NCOUNT is the approximate
AIPS 1:                                    ratio of AC to XC in file.



2010/7/7 Eric Greisen <egreisen at nrao.edu>:
> Takayuki HAYASHI wrote:
>>
>> Thank you for your advise.
>>
>> I checked my data by UVPLT with "DOCAL 1" and there are the data which
>> include MK.
>> So, my CL or SN tables are correct.
>> Then I tried to check BP table by POSSM with "aparm(8) 1" and found
>> there are no data for LHCP of MK.
>> Moreover, when I tried to SPLIT the data with "DOBAN -1" it worked well.
>> So, there are no problem with SPLIT and I suspect BPASS doesn't work well.
>>
>> Could you give me more advise about BPASS to calibrate LHCP of MK ?
>> My BPASS parameters are below.
>> CL table 6 include calibration for baseline which include LHCP of MK
>> withou fail.
>
> I do not know what went wrong with BPASS - perhaps you should try again and
> look at the BP table with PRTAB.
>
> I tried making a data set with the RR polarization of one antenna flagged.
>  Then I ran BPASS and got what I expected - blanked out solutions in RR and
> good solutions in LL.  Therefore, I do not expect a there to be a simple bug
> in BPASS and have no real idea what has happened with your data.
>
> Eric Greisen
>



-- 
=================================================
Takayuki Hayashi   t.hayashi at nao.ac.jp
　　　Department of Astronomy
　　　School of Science, The University of Tokyo
　　　http://rinsan-t.net/
=================================================