[daip] Tsys values loaded by FILLM

[Amy Mioduszewski]

Hi Lynn,

I have asked around and the consensus seems to be that your data was taken right 
when the modcomps were being transitioned out so no-one seems be be surprised 
that the Tsys are funny.  Since the Tsys seem to be fine with current data, 
we've decided not to explore your bug further.

Thanks,

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
>>>
>>
>