[daip] data from the Penticton correlator and FITLD
Amy Mioduszewski
amiodusz at aoc.nrao.edu
Tue May 14 13:40:20 EDT 2002
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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