[daip] Strange PRTAN data in AL592 data set
Jim Ulvestad
julvesta at aoc.nrao.edu
Wed Jul 9 09:39:16 EDT 2003
I have found this problem previously with the archive, when the antennas
file
is missing for some reason. However, I'm surprised it happens in new data.
I'm copying this to Ken and Pat in case there is something they need to look
at in the way data are being written to the original tapes.
The antennas have been in the same place for a few weeks. So the solution
I have used in the past is to find an observation a couple days earlier or
later, and fill a little bit of that observation. Then you can take the
AN table from that data set, and copy it to the faulty data set using
TACOP. That should fix Loinard's immediate problem. Ken or Pat,
do you have any idea how the antennas file might have failed to get
connected to the data?
Jim
Data Analysts wrote:
>Hi,
>
>We recent loaded data from VLA experiment AL592 onto disk for Laurent Loinard
>to FTP. He retrieved the data, but is having trouble with the PRTAN output file
>(see his Email below). I reloaded the data into AIPS and encountered the same
>problem he had. Namely, there is no pad number listed for any antenna (they
>all just say 'VLA:OUT').
>
>The data file can be found on machine Aspen, AIPS disk #7, AIPS catalog #5,
>AIPS user # 33, called AL592.030622.Q BAND. 1.
>
>The PRTAN file can be found at /home/aspen7/ and is called AL592.PRTAN.
>
>Here are the FILLM inputs that we use:
>...
>
>
>>inp
>>
>>
>AIPS 1: FILLM Task to read a VLA archive tape
>AIPS 1: Adverbs Values Comments
>AIPS 1: ----------------------------------------------------------------
>AIPS 1: INTAPE 3 Tape drive number
>AIPS 1: INFILE ' '
>AIPS 1: Non-blank: disk file name
>AIPS 1: NFILES 0 Number of files to advance
>AIPS 1: BAND ' ' Freq. band (4,P,L,C,X,U,K,Q)
>AIPS 1: QUAL -1 Source qualifier -1=>all
>AIPS 1: CALCODE ' ' Calibrator code
>AIPS 1: VLAOBS 'AL592 ' VLA obs. pgm. name ('AZ99')
>AIPS 1: VLAMODE ' ' VLA obs. mode (' '=any)
>AIPS 1: REFDATE '20030622' Reference date. 'yyyymmdd'
>AIPS 1: TIMERANG 0 2 Timerange selected
>AIPS 1: 44 0 0 8
>AIPS 1: 41 0
>AIPS 1: BCHAN 1 First spectral channel
>AIPS 1: ECHAN 0 Highest spectral channel
>AIPS 1: OUTNAME 'AL592.030622' Output UV file name (name)
>AIPS 1: OUTSEQ 0 Output UV file name (seq. #)
>AIPS 1: OUTDISK 7 Output UV file disk unit #.
>AIPS 1: DOUVCOMP -1 1 (T) => compressed data
>AIPS 1: DOALL 1 1 (T) => write all data.
>AIPS 1: DOCONCAT 1 1 (T) => append data to old
>AIPS 1: files
>AIPS 1: NCOUNT 0 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 *all 0 User options.
>AIPS 1: 1 => Avg. time (seconds)
>AIPS 1: 2 => bitmap (see help)
>AIPS 1: ** press RETURN for more, enter Q or next line to quit print **
>#
>AIPS 1: = 16 for planets & Sun
>AIPS 1: 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: IN2FILE ' '
>AIPS 1: Antenna gains file
>
>
>...
>
>I am not sure if this is an AIPS problem or a data table problem, but I
>am sending it to you guys to investigate.
>
>Regards,
>
>Jason
>
>
>
>>From l.loinard at astrosmo.unam.mx Tue Jul 8 09:29 MDT 2003
>>Sender: l.loinard at astrosmo.unam.mx
>>
>>
>>I got the data and successfully read them using fillm, si you can erase
>>them from
>>the scratch disk. I reduced them quickly and found that they were very good
>>data.
>>I only have a small problem: when I run prtan to see where each antenna
>>was, it
>>tells me that all the antennas were out.. This is somewhat of a problem
>>since I'd need
>>to know where the antennas were in order to select only the central ones
>>for the flux
>>calibration..
>>
>>So if you would know where the antennas were, or alternatively could tell
>>me
>>how to fix the problem, that'd be great!
>>
>>Cheers,
>>Laurent
>>
>>
>>
>>
>_______________________________________________
>Daip mailing list
>Daip at listmgr.cv.nrao.edu
>http://listmgr.cv.nrao.edu/mailman/listinfo/daip
>
>
More information about the Daip
mailing list