[daip] Tsys values loaded by FILLM

[Amy Mioduszewski]

Hi Lynn,

So I have confirmed that your data does this.  I checked if it was just that one 
dataset of yours but the am887 from May 4 does the same thing.  Now I just have 
to figure out what about your data is triggering the problem.  I tried it on 
random continuum and line datasets and they behaved correctly, although none 
from 2007.  Anyway, I assume you are not stuck because of this, Eric is away and 
I am very busy with other things so this is going to go slowly.

Amy

Lynn D. Matthews wrote:
>     Amy,
> 
> The data I'm working on are from program AM887 (AM887_I070505.xp1).
> 
> FILLM inputs are appended below.
> 
> Lynn
> 
> AIPS 1: FILLM     Task to read a VLA archive tape
> AIPS 1: Adverbs     Values                 Comments
> AIPS 1: ----------------------------------------------------------------
> AIPS 1: INTAPE        1                    Tape drive number
> AIPS 1: DATAIN     '/data/lmatthew/AGBdata Non-blank: disk file name
> AIPS 1:            /AM887_I070505.xp'
> AIPS 1: NFILES        0                    Number of files to advance
> AIPS 1:                                    Also applies to ON-LINE!
> AIPS 1: BAND       ' '                     Freq. band:
> AIPS 1:                                      (4,P,L,S,C,X,U,K,A,Q)
> AIPS 1: QUAL         -1                    Source qualifier -1=>all
> AIPS 1: CALCODE    ' '                     Calibrator code
> AIPS 1: VLAOBS     ' '                     VLA obs. pgm. name ('AZ99')
> AIPS 1: VLAMODE    ' '                     VLA obs. mode ('  '=any)
> AIPS 1: REFDATE    ' '                     Reference date. 'yyyymmdd'
> AIPS 1: TIMERANG   *all 0                  Timerange selected
> AIPS 1: BCHAN         1                    First spectral channel
> AIPS 1: ECHAN         0                    Highest spectral channel
> AIPS 1: OUTNAME    ' '                     Output UV file name (name)
> AIPS 1: OUTSEQ        0                    Output UV file name (seq. #)
> AIPS 1: OUTDISK       1                    Output UV file disk unit #.
> AIPS 1: DOUVCOMP     -1                    1 (T) => compressed data
> AIPS 1: DOCONCAT     -1                    1 (T) => append data to old
> AIPS 1:                                    files
> AIPS 1: NCOUNT        1                    Number of files to read
> AIPS 1: DOWEIGHT      1                    Use nominal sensitivity to
> AIPS 1:                                    scale weights?
> AIPS 1:                                    = 10, use Memo 108 weights
> AIPS 1: DOACOR        1                    Load autocorrelation data?
> AIPS 1: CPARM         0           0        User options.
> AIPS 1:               0           0        1 => Avg. time (seconds)
> AIPS 1:               0           0        2 => bitmap    (see help)
> AIPS 1:              -1           1             = 16 for planets & Sun
> AIPS 1:               0           0        3 => Max. OK IF status
> AIPS 1:                                         <=3 => 3
> AIPS 1:                                    4 => Control dropping of
> AIPS 1:                                         shadowed data
> AIPS 1:                                         < 0 => no shadow check
> AIPS 1:                                         0 => 25 m limit
> AIPS 1:                                         > 0 => Shadow limit is
> AIPS 1:                                               CPARM(4) in meters
> AIPS 1:                                    5 = channel code (see HELP)
> AIPS 1:                                    6 => Subarray number-see HELP
> AIPS 1:                                    7 => FQ entry tolerance (kHz)
> AIPS 1:                                         (see HELP)
> AIPS 1:                                    8 => CL table time incr. min
> AIPS 1:                                    9 => TY table time incr. min
> AIPS 1:                                    10=> Calibrator avg. time
> AIPS 1: DPARM      *all 0                  Selection by Frequency
> AIPS 1:                                    1+2 => A Frequency (Hz)
> AIPS 1:                                    3+4 => B Frequency (Hz)
> AIPS 1:                                    5+6 => C Frequency (Hz)
> AIPS 1:                                    7+8 => D Frequency (Hz)
> AIPS 1:                                    9 => tolerance for A&C
> AIPS 1:                                    10 => tolerance for B&D
> AIPS 1: BPARM      *all 0                  Opacity and Gain curve
> AIPS 1:                                    control (see help)
> AIPS 1: CALIN      *all ' '                Antenna gains file
> 
> 
> On Tue, 8 Sep 2009, Amy Mioduszewski wrote:
> 
>> Hi Lynn,
>>
>> I think there is something odd about your data.  I just checked some 
>> recent data of my own and I get identical (non-zero) TANTs for EVLA 
>> antennas with CPARM(2)=0 and 2.  What is your data, so I can download 
>> it and take a look? Also send me all of your FILLM inputs.
>>
>> Amy
>>
>> Lynn D. Matthews wrote:
>>> I've noticed a couple of potential problems with the way FILLM is 
>>> handling the Tsys values placed in the TY table.
>>>
>>> My understanding from the FILLM help file is that FILLM is supposed 
>>> to load the back-end Tsys values for EVLA antennas regardless of the 
>>> value of CPARM(2). Assuming that is correct, then it is not what is 
>>> happening; CPARM(2)=0 leads to the "TANT" values (i.e., the Tsys 
>>> values) all being zero.
>>>
>>> If one sets CPARM(2)=2, it loads the back-end Tsys values for both 
>>> VLA and EVLA antennas, except that in the first record of the TY 
>>> table, the "TANT" values for all the EVLA antennas are set to 0.
>>>
>>> Lynn Matthews
>>>
>>> _______________________________________________
>>> Daip mailing list
>>> Daip at listmgr.cv.nrao.edu
>>> http://listmgr.cv.nrao.edu/mailman/listinfo/daip
>>>
>>
>