[daip] data from the Penticton correlator and FITLD
Jim Ulvestad
julvesta at aoc.nrao.edu
Tue May 14 15:22:45 EDT 2002
What happens if you run FITLD from "OLD" and tell it to
make the VLBA correlator corrections (DIGICOR AND DELCOR)?
If you do this, and get the same result as from NEW or TST,
then your guess is correct. If not, it's something else.
It originally took a lot of effort to make FITLD and the
Penticton correlator speak the same language, so I could
see something going wrong in some update of FITLD, even
if it's not a misunderstanding about what correlator the
data are from.
jim
Amy Mioduszewski wrote:
>
> There are a couple of visitors here reducing VSOP data from
> the Penticton correlator. When they use FITLD from versions
> NEW or TST they get amplitudes that are low by a factor of
> ~16, OLD does the correct thing. Below are tidbits from
> UVPRT (CPARM(10)=100) as well as the messages from FITLD
> (version OLD). Note that both the amplitudes and the weights
> are different. A clue to the possible problem is that if you
> look in the header of these files it says "Receiver=VLBA".
> So my guess is FITLD thinks this data is from the VLBA
> correlator and is "correcting" it.
>
> You can copy the FITS file from my directory:
> /home/beset2/amy/AIPSser/vs06o.001
>
> PRTUV from FITLD version OLD:
> Source= J1224+21 Freq= 4.799999864 Sort= TB 1 LL
> Vis # IAT Ant Su Fq U(klam) V(klam) W(klam) Amp Phas Wt
>
> 1 0/17:59:34.75 4- 4 1 1 0 0 0 0.000 0 0.6250
> 2 0/17:59:59.00 3- 4 1 1 25078 -110268 -6751 0.372 109 0.6250
> 3 0/18:00:01.00 1- 3 1 1 -15278 5513 -16562 0.146 74 0.6250
> 4 0/18:00:01.00 1- 4 1 1 9804 -104754 -23316 0.338 -90 0.6250
> 5 0/18:00:01.00 3- 4 1 1 25083 -110267 -6754 0.091 34 0.6250
> 6 0/18:00:03.00 1- 3 1 1 -15281 5512 -16560 0.191 -4 0.6250
> 7 0/18:00:03.00 1- 4 1 1 9807 -104754 -23317 0.150 -73 0.6250
> 8 0/18:00:03.00 3- 4 1 1 25088 -110266 -6758 0.160 -15 0.6250
> 9 0/18:00:05.00 1- 3 1 1 -15283 5511 -16558 0.065-168 0.6250
> 10 0/18:00:05.00 1- 4 1 1 9809 -104753 -23319 0.280 54 0.6250
> 11 0/18:00:05.00 3- 4 1 1 25093 -110264 -6761 0.152 -9 0.6250
> 12 0/18:00:07.00 1- 3 1 1 -15286 5510 -16556 0.209 -52 0.6250
> 13 0/18:00:07.00 1- 4 1 1 9811 -104752 -23320 0.133-127 0.6250
> 14 0/18:00:07.00 3- 4 1 1 25097 -110263 -6764 0.392-118 0.6250
> 15 0/18:00:09.00 1- 3 1 1 -15289 5510 -16554 0.081-145 0.6250
>
> version NEW:
> Source= J1224+21 Freq= 4.799999864 Sort= TB 1 LL
> Vis # IAT Ant Su Fq U(klam) V(klam) W(klam) Amp Phas Wt
>
> 1 0/17:59:34.75 4- 4 1 1 0 0 0 0.000 0 16.000
> 2 0/17:59:59.00 3- 4 1 1 25078 -110268 -6751 0.023 109 0.125
> 3 0/18:00:01.00 1- 3 1 1 -15278 5513 -16562 0.009 74 0.125
> 4 0/18:00:01.00 1- 4 1 1 9804 -104754 -23316 0.021 -90 0.125
> 5 0/18:00:01.00 3- 4 1 1 25083 -110267 -6754 0.006 34 0.125
> 6 0/18:00:03.00 1- 3 1 1 -15281 5512 -16560 0.012 -4 0.125
> 7 0/18:00:03.00 1- 4 1 1 9807 -104754 -23317 0.009 -73 0.125
> 8 0/18:00:03.00 3- 4 1 1 25088 -110266 -6758 0.010 -15 0.125
> 9 0/18:00:05.00 1- 3 1 1 -15283 5511 -16558 0.004-168 0.125
> 10 0/18:00:05.00 1- 4 1 1 9809 -104753 -23319 0.017 54 0.125
> 11 0/18:00:05.00 3- 4 1 1 25093 -110264 -6761 0.009 -9 0.125
> 12 0/18:00:07.00 1- 3 1 1 -15286 5510 -16556 0.013 -52 0.125
> 13 0/18:00:07.00 1- 4 1 1 9811 -104752 -23320 0.008-127 0.125
> 14 0/18:00:07.00 3- 4 1 1 25097 -110263 -6764 0.024-118 0.125
> 15 0/18:00:09.00 1- 3 1 1 -15289 5510 -16554 0.005-145 0.125
>
> FITLD1: Task FITLD (release of 31DEC00) begins
> FITLD1: ZTPOPD: using translated file name =
> FITLD1: ZTPOPD: /home/beset2/amy/AIPSser/vs06o.001
> FITLD1: FITLD Version 10.5.1
> FITLD1: Last updated on November 17 1999
> FITLD1: Recognize and handle OVLBI time filters
> FITLD1: Fix duplicate SU entries, result of CALCODEs
> FITLD1: Read multiple uv tables per FITS file
> FITLD1: Deal correctly with weights as an array
> FITLD1: Antenna numbers in MC table numbered correctly
> FITLD1: Read FLAG and WEATHER tables
> FITLD1: Reads a-priori information for VLBA
> FITLD1: Adjusts AN table reference frequency
> FITLD1: Can now do calibration transfer
> FITLD1: Checks for invalid calibration tables
> FITLD1: Does not round frequencies excessively
> FITLD1: Now concatenates cal transfer tables
> FITLD1: Now handles correct u,v,w labels
> FITLD1: Now handles explicit subarrays
> FITLD1: Tolerates data out of time order within days
> FITLD1: Weights now proportional to integration time for VLBA
> FITLD1: VLBA saturation correction now applied correctly
> FITLD1: Sky frequencies (MHz) before re-ordering occurs:
> FITLD1: Incoming FREQID # 1FITLD1: 4800.00 4816.00
> FITLD1: IMREF1: NUMBER KEYWORDS 51 NOT EXPECTED 12
> FITLD1: Attaching data to VS06O.001 .UVDATA. 1 Vol: 2
> FITLD1: CL table interval set at 0.10 minutes
> FITLD1: Current file has 44301 visibilities
> FITLD1: File ref. freq: 4800.00 MHz
> FITLD1: Found J1224+21 at 0/17:59:35 src # 1
> FITLD1: fqid # 1
> FITLD1: Found J1215-17 at 0/19:01:49 src # 2
> FITLD1: Found J1224+21 at 0/19:11:49 src # 1
> FITLD1: 10000 vis. written
> FITLD1: 20000 vis. written
> FITLD1: 30000 vis. written
> FITLD1: 40000 vis. written
> FITLD1: Found J1337-12 at 0/20:51:49 src # 3
> FITLD1: UV table spanned time: 0/17:59:35 - 0/21:00:01
> FITLD1: 44301 vis. written
> FITLD1: PHINI: PHASE-CAL (PH) TABLE 1 IS NOT VALID
> FITLD1: PHINI: COLUMN 'PC_FREQ 1' IS MISSING
> FITLD1: PHINI: COLUMN 'PC_REAL 1' IS MISSING
> FITLD1: PHINI: COLUMN 'PC_IMAG 1' IS MISSING
> FITLD1: PHINI: COLUMN 'PC_RATE 1' IS MISSING
> FITLD1: PH2PC : ERROR 1 FROM PHINI OPCODE = READ
> FITLD1: BT2AIP: ERROR 1 CONVERTING PHASE-CAL TABLES
> FITLD1: **************************************************
> FITLD1: Subarray or data out of order condition found.
> FITLD1: NX/CL tables deleted.
> FITLD1: Use USUBA to set up subarrays.
> FITLD1: Rerun INDXR using CPARM(3) and (4)
> FITLD1: **************************************************
> FITLD1: HICREA: WARNING - ADDING TO EXISTING HI FILE
> FITLD1: Image=MULTI (UV) Filename=VS06O.001 .UVDATA. 1
> FITLD1: Telescope=VS06o Receiver=VLBA
> FITLD1: Observer=VS06o User #= 10
> FITLD1: Observ. date=18-DEC-2001 Map date=14-MAY-2002
> FITLD1: # visibilities 132903 Sort order TB
> FITLD1: Rand axes: UU-L-SIN VV-L-SIN WW-L-SIN TIME1 BASELINE
> FITLD1: SOURCE FREQSEL INTTIM CORR-ID WEIGHT SCALE
> FITLD1: ----------------------------------------------------------------
> FITLD1: Type Pixels Coord value at Pixel Coord incr Rotat
> FITLD1: COMPLEX 1 1.0000000E+00 1.00 1.0000000E+00 0.00
> FITLD1: STOKES 1 -2.0000000E+00 1.00 -1.0000000E+00 0.00
> FITLD1: FREQ 128 4.8000000E+09 1.00 1.2500000E+05 0.00
> FITLD1: IF 2 1.0000000E+00 1.00 1.0000000E+00 0.00
> FITLD1: RA 1 00 00 00FITLD1: Coordinate equinox 2000.00
> FITLD1: Maximum version number of extension files of type HI is 1
> FITLD1: Maximum version number of extension files of type AT is 1
> FITLD1: Maximum version number of extension files of type PH is 1
> FITLD1: Maximum version number of extension files of type IM is 1
> FITLD1: Maximum version number of extension files of type FQ is 1
> FITLD1: Maximum version number of extension files of type AN is 1
> FITLD1: Maximum version number of extension files of type SU is 1
> FITLD1: Maximum version number of extension files of type FG is 1
> FITLD1: Appears to have ended successfully
> FITLD1: beset 31DEC00 OLD: Cpu= 5.1 Real= 5.000 1.00
> 0.000000 0.00
> FITLD1: DEC 1 00 00 00.000 1.00 0.000000 0.00
> FITLD1: ----------------------------------------------------------------
>
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