<div dir="ltr"><div><div><div><div><div>I am encountering an issue when trying to use DBCON to merge two datasets: one from the VLA and another from MERLIN. They share similar frequencies (C band). My procedure, in short, was as follows:<br>
<br></div>1.) Load calibrated data in via FITLD:<br><br>restore 0<br>indi 1<br>outdi 1<br>getn 1;zap<br>getn 2;zap<br>getn 3;zap<br>getn 4;zap<br>task 'fitld'<br>datain 'J0833+1124.MERLIN.010297.C<br>go;wait<br>
datain 'J0833+1124.AS0172.A.C<br>go;wait<br>getn 1<br>imh;wait<br>getn 2<br>imh;wait<br><br></div>2.) Adjust phase center of VLA data to coincide with higher resolution MERLIN phase center using AXDEFINE:<br></div><br>
task 'axdefine'<br>naxis 4<br>axtype 'ra'<br>axref 1<br>axinc 0<br>axval= 128.30 0.00986666<br>axdef<br>imh<br><br>naxis 5<br>axtype 'dec'<br>axval= 11.3934 0.0000027778<br>axinc 0<br>axdef<br>imh<br>
<br>3.) Scaled core fluxes to match using UVMOD:<br></div><br>task 'uvmod'<br>factor 1.64125<br>go;wait<br><br><br>4.) Attempted to merge new UVMOD file with loaded MERLIN FITS file:<br><br>task 'dbcon'<br>
getn 3<br>get2n 1<br>dopos 1,-1<br>doarray =-1 <br>go;wait<br><br><br></div><div>At this point I get the error:<br><br>DBCON1: Task DBCON (release of 31DEC13) begins<br>DBCON1: RA does not match, will shift second<br>DBCON1: DEC does not match, will shift second<br>
DBCON1: RA AXIS HAS UNEQUAL ATTRIBUTES<br>DBCON1: Purports to die of UNNATURAL causes<br>DBCON1: ubuntu 31DEC13 TST: Cpu= 0.0 Real= 0<br>AIPS 1: Resumes<br>AIPS 1: DBCON was not found to be running<br>
</div><div><br><br></div><div>The entirety of my output is copied below along. The only thing I can see is that there are two DEC values at the end rather than one. I called imh numerous times throughout to track the progress.<br>
<br>Any thoughts?<br><br></div><div>~Doug<br></div><div><br><br><br></div><div>***************************************OUTPUT******************************************<br><br><br></div><div>>task 'fitld'<br>>datain 'J0833+1124.MERLIN.010297.C<br>
>go;wait<br>FITLD1: Task FITLD (release of 31DEC13) begins<br>FITLD1: Found 0830+115 observed on 01-JAN-1997<br>FITLD1: Create 0830+115 .SPLIT . 1 (UV) on disk 1 cno 1<br>AIPS 1: Resumes<br>FITLD1: Image=0830+115 (UV) Filename=0830+115 .SPLIT . 1<br>
FITLD1: Telescope=MERLIN2 Receiver=<br>FITLD1: Observer= User #= 3666<br>FITLD1: Observ. date=01-JAN-1997 Map date=09-JUL-2014<br>FITLD1: # visibilities 13550 Sort order TB<br>FITLD1: Rand axes: UU-L-SIN VV-L-SIN WW-L-SIN BASELINE TIME1<br>
FITLD1: ----------------------------------------------------------------<br>FITLD1: Type Pixels Coord value at Pixel Coord incr Rotat<br>FITLD1: COMPLEX 3 0.0000000E+00 1.00 1.0000000E+00 0.00<br>
FITLD1: STOKES 4 -1.0000000E+00 1.00 -1.0000000E+00 0.00<br>FITLD1: FREQ 1 4.9940000E+09 1.00 1.3000000E+07 0.00<br>FITLD1: IF 1 1.0000000E+00 1.00 1.0000000E+00 0.00<br>
FITLD1: RA 1 08 33 14.368 1.00 3600.000 0.00<br>FITLD1: DEC 1 11 23 36.250 1.00 3600.000 0.00<br>FITLD1: ----------------------------------------------------------------<br>
FITLD1: Coordinate equinox 2000.00<br>FITLD1: Rest freq 0.000 Vel type: OPTICAL wrt YOU<br>FITLD1: Alt ref. value 0.00000E+00 wrt pixel 1.00<br>FITLD1: Maximum version number of extension files of type HI is 1<br>
FITLD1: Maximum version number of extension files of type NX is 1<br>FITLD1: Maximum version number of extension files of type FQ is 1<br>FITLD1: Maximum version number of extension files of type AN is 1<br>FITLD1: Appears to have ended successfully<br>
FITLD1: ubuntu 31DEC13 TST: Cpu= 0.2 Real= 0 IO= 10<br>AIPS 1: Task FITLD has finished<br>>datain 'J0833+1124.AS0172.A.C<br>>go;wait<br>FITLD1: Task FITLD (release of 31DEC13) begins<br>FITLD1: Found AB4 observed on 26-SEP-1983<br>
FITLD1: Create AB4 .SPLIT . 1 (UV) on disk 1 cno 2<br>FITLD1: UVFDAT: counts for cross-correlations<br>FITLD1: UVFDAT: found 26820 spectra samples already flagged<br>FITLD1: UVFDAT: found 50.000 percent samples already flagged<br>
FITLD1: Image=AB4 (UV) Filename=AB4 .SPLIT . 1<br>FITLD1: Telescope=VLA Receiver=VLA<br>FITLD1: Observer=AS172 User #= 3666<br>FITLD1: Observ. date=26-SEP-1983 Map date=09-JUL-2014<br>
FITLD1: # visibilities 6705 Sort order TB<br>FITLD1: Rand axes: UU-L-SIN VV-L-SIN WW-L-SIN BASELINE TIME1<br>FITLD1: ----------------------------------------------------------------<br>FITLD1: Type Pixels Coord value at Pixel Coord incr Rotat<br>
FITLD1: COMPLEX 3 1.0000000E+00 1.00 1.0000000E+00 0.00<br>FITLD1: STOKES 4 -1.0000000E+00 1.00 -1.0000000E+00 0.00<br>FITLD1: FREQ 1 4.8851000E+09 1.00 5.0000000E+07 0.00<br>
FITLD1: IF 2 1.0000000E+00 1.00 1.0000000E+00 0.00<br>LOGFILE FOR USER 3666 GETTING LARGE: USE PRTMSG AND CLRMSG NOW! <br>FITLD1: RA 1 08 33 15.041 1.00 3600.000 0.00<br>
FITLD1: DEC 1 11 23 41.497 1.00 3600.000 0.00<br>FITLD1: ----------------------------------------------------------------<br>FITLD1: Coordinate equinox 2000.00<br>FITLD1: Observed RA 08 30 30.600 DEC 11 33 58.00<br>
FITLD1: Rest freq 0.000 Vel type: OPTICAL wrt YOU<br>FITLD1: Alt ref. value 0.00000E+00 wrt pixel 1.00<br>FITLD1: Maximum version number of extension files of type HI is 1<br>FITLD1: Maximum version number of extension files of type NX is 1<br>
FITLD1: Maximum version number of extension files of type FQ is 1<br>FITLD1: Maximum version number of extension files of type WX is 1<br>FITLD1: Maximum version number of extension files of type OF is 1<br>FITLD1: Maximum version number of extension files of type AN is 1<br>
FITLD1: Appears to have ended successfully<br>FITLD1: ubuntu 31DEC13 TST: Cpu= 0.0 Real= 0 IO= 2<br>AIPS 1: Resumes<br>AIPS 1: FITLD was not found to be running<br>>getn 1<br>AIPS 1: Got(1) disk= 1 user=3666 type=UV 0830+115.SPLIT.1<br>
>imh;wait<br>AIPS 1: Image=0830+115 (UV) Filename=0830+115 .SPLIT . 1<br>AIPS 1: Telescope=MERLIN2 Receiver=<br>AIPS 1: Observer= User #= 3666<br>AIPS 1: Observ. date=01-JAN-1997 Map date=09-JUL-2014<br>
AIPS 1: # visibilities 13550 Sort order TB<br>AIPS 1: Rand axes: UU-L-SIN VV-L-SIN WW-L-SIN BASELINE TIME1<br>AIPS 1: ----------------------------------------------------------------<br>AIPS 1: Type Pixels Coord value at Pixel Coord incr Rotat<br>
AIPS 1: COMPLEX 3 0.0000000E+00 1.00 1.0000000E+00 0.00<br>AIPS 1: STOKES 4 -1.0000000E+00 1.00 -1.0000000E+00 0.00<br>AIPS 1: FREQ 1 4.9940000E+09 1.00 1.3000000E+07 0.00<br>
AIPS 1: IF 1 1.0000000E+00 1.00 1.0000000E+00 0.00<br>AIPS 1: RA 1 08 33 14.368 1.00 3600.000 0.00<br>AIPS 1: DEC 1 11 23 36.250 1.00 3600.000 0.00<br>
AIPS 1: ----------------------------------------------------------------<br>AIPS 1: Coordinate equinox 2000.00<br>AIPS 1: Rest freq 0.000 Vel type: OPTICAL wrt YOU<br>AIPS 1: Alt ref. value 0.00000E+00 wrt pixel 1.00<br>
AIPS 1: Maximum version number of extension files of type HI is 1<br>AIPS 1: Maximum version number of extension files of type NX is 1<br>AIPS 1: Maximum version number of extension files of type FQ is 1<br>AIPS 1: Maximum version number of extension files of type AN is 1<br>
AIPS 1: FITLD was not found to be running<br>>getn 2<br>AIPS 1: Got(1) disk= 1 user=3666 type=UV AB4.SPLIT.1<br>>imh;wait<br>AIPS 1: Image=AB4 (UV) Filename=AB4 .SPLIT . 1<br>AIPS 1: Telescope=VLA Receiver=VLA<br>
AIPS 1: Observer=AS172 User #= 3666<br>AIPS 1: Observ. date=26-SEP-1983 Map date=09-JUL-2014<br>AIPS 1: # visibilities 6705 Sort order TB<br>AIPS 1: Rand axes: UU-L-SIN VV-L-SIN WW-L-SIN BASELINE TIME1<br>
AIPS 1: ----------------------------------------------------------------<br>AIPS 1: Type Pixels Coord value at Pixel Coord incr Rotat<br>AIPS 1: COMPLEX 3 1.0000000E+00 1.00 1.0000000E+00 0.00<br>
AIPS 1: STOKES 4 -1.0000000E+00 1.00 -1.0000000E+00 0.00<br>AIPS 1: FREQ 1 4.8851000E+09 1.00 5.0000000E+07 0.00<br>AIPS 1: IF 2 1.0000000E+00 1.00 1.0000000E+00 0.00<br>
AIPS 1: RA 1 08 33 15.041 1.00 3600.000 0.00<br>AIPS 1: DEC 1 11 23 41.497 1.00 3600.000 0.00<br>AIPS 1: ----------------------------------------------------------------<br>
AIPS 1: Coordinate equinox 2000.00<br>AIPS 1: Observed RA 08 30 30.600 DEC 11 33 58.00<br>AIPS 1: Rest freq 0.000 Vel type: OPTICAL wrt YOU<br>AIPS 1: Alt ref. value 0.00000E+00 wrt pixel 1.00<br>AIPS 1: Maximum version number of extension files of type HI is 1<br>
AIPS 1: Maximum version number of extension files of type NX is 1<br>AIPS 1: Maximum version number of extension files of type FQ is 1<br>AIPS 1: Maximum version number of extension files of type WX is 1<br>AIPS 1: Maximum version number of extension files of type OF is 1<br>
AIPS 1: Maximum version number of extension files of type AN is 1<br>AIPS 1: Keyword = 'CORRMODE' value = ' '<br>AIPS 1: Keyword = 'VLAIFS ' value = 'ABCD '<br>AIPS 1: Keyword = 'CORRCOEF' value = -1<br>
AIPS 1: Keyword = 'MAXABSU ' value = -1.000000E+00<br>AIPS 1: Keyword = 'SOURNAM1' value = 'AB4 '<br>AIPS 1: Keyword = 'SOURNAM2' value = ' '<br>AIPS 1: FITLD was not found to be running<br>
><br>><br>>task 'axdefine'<br>>naxis 4<br>>axtype 'ra'<br>>axref 1<br>>axinc 0<br>>axval= 128.30 0.00986666<br>>axdef<br>>imh<br>AIPS 1: Image=AB4 (UV) Filename=AB4 .SPLIT . 1<br>
AIPS 1: Telescope=VLA Receiver=VLA<br>AIPS 1: Observer=AS172 User #= 3666<br>AIPS 1: Observ. date=26-SEP-1983 Map date=09-JUL-2014<br>AIPS 1: # visibilities 6705 Sort order TB<br>
AIPS 1: Rand axes: UU-L-SIN VV-L-SIN WW-L-SIN BASELINE TIME1<br>AIPS 1: ----------------------------------------------------------------<br>AIPS 1: Type Pixels Coord value at Pixel Coord incr Rotat<br>AIPS 1: COMPLEX 3 1.0000000E+00 1.00 1.0000000E+00 0.00<br>
AIPS 1: STOKES 4 -1.0000000E+00 1.00 -1.0000000E+00 0.00<br>AIPS 1: FREQ 1 4.8851000E+09 1.00 5.0000000E+07 0.00<br>AIPS 1: RA 2 08 33 14.369 1.00 3600.000 0.00<br>
AIPS 1: RA 1 08 33 15.041 1.00 3600.000 0.00<br>AIPS 1: DEC 1 11 23 41.497 1.00 3600.000 0.00<br>AIPS 1: ----------------------------------------------------------------<br>
AIPS 1: Coordinate equinox 2000.00<br>AIPS 1: Observed RA 08 30 30.600 DEC 11 33 58.00<br>AIPS 1: Rest freq 0.000 Vel type: OPTICAL wrt YOU<br>AIPS 1: Alt ref. value 0.00000E+00 wrt pixel 1.00<br>AIPS 1: Maximum version number of extension files of type HI is 1<br>
AIPS 1: Maximum version number of extension files of type NX is 1<br>AIPS 1: Maximum version number of extension files of type FQ is 1<br>AIPS 1: Maximum version number of extension files of type WX is 1<br>AIPS 1: Maximum version number of extension files of type OF is 1<br>
AIPS 1: Maximum version number of extension files of type AN is 1<br>AIPS 1: Keyword = 'CORRMODE' value = ' '<br>AIPS 1: Keyword = 'VLAIFS ' value = 'ABCD '<br>AIPS 1: Keyword = 'CORRCOEF' value = -1<br>
AIPS 1: Keyword = 'MAXABSU ' value = -1.000000E+00<br>AIPS 1: Keyword = 'SOURNAM1' value = 'AB4 '<br>AIPS 1: Keyword = 'SOURNAM2' value = ' '<br>><br>>naxis 5<br>
>axtype 'dec'<br>>axval= 11.3934 0.0000027778<br>>axinc 0<br>>axdef<br>>imh<br>AIPS 1: Image=AB4 (UV) Filename=AB4 .SPLIT . 1<br>AIPS 1: Telescope=VLA Receiver=VLA<br>
AIPS 1: Observer=AS172 User #= 3666<br>AIPS 1: Observ. date=26-SEP-1983 Map date=09-JUL-2014<br>AIPS 1: # visibilities 6705 Sort order TB<br>AIPS 1: Rand axes: UU-L-SIN VV-L-SIN WW-L-SIN BASELINE TIME1<br>
AIPS 1: ----------------------------------------------------------------<br>AIPS 1: Type Pixels Coord value at Pixel Coord incr Rotat<br>AIPS 1: COMPLEX 3 1.0000000E+00 1.00 1.0000000E+00 0.00<br>
AIPS 1: STOKES 4 -1.0000000E+00 1.00 -1.0000000E+00 0.00<br>AIPS 1: FREQ 1 4.8851000E+09 1.00 5.0000000E+07 0.00<br>AIPS 1: RA 2 08 33 14.369 1.00 3600.000 0.00<br>
AIPS 1: DEC 1 11 23 36.251 1.00 3600.000 0.00<br>AIPS 1: DEC 1 11 23 41.497 1.00 3600.000 0.00<br>AIPS 1: ----------------------------------------------------------------<br>
AIPS 1: Coordinate equinox 2000.00<br>AIPS 1: Observed RA 08 30 30.600 DEC 11 33 58.00<br>AIPS 1: Rest freq 0.000 Vel type: OPTICAL wrt YOU<br>AIPS 1: Alt ref. value 0.00000E+00 wrt pixel 1.00<br>AIPS 1: Maximum version number of extension files of type HI is 1<br>
AIPS 1: Maximum version number of extension files of type NX is 1<br>AIPS 1: Maximum version number of extension files of type FQ is 1<br>AIPS 1: Maximum version number of extension files of type WX is 1<br>AIPS 1: Maximum version number of extension files of type OF is 1<br>
AIPS 1: Maximum version number of extension files of type AN is 1<br>AIPS 1: Keyword = 'CORRMODE' value = ' '<br>AIPS 1: Keyword = 'VLAIFS ' value = 'ABCD '<br>AIPS 1: Keyword = 'CORRCOEF' value = -1<br>
AIPS 1: Keyword = 'MAXABSU ' value = -1.000000E+00<br>AIPS 1: Keyword = 'SOURNAM1' value = 'AB4 '<br>AIPS 1: Keyword = 'SOURNAM2' value = ' '<br>><br>>task 'uvmod'<br>
>factor 1.64125<br>>go;wait<br>UVMOD1: Task UVMOD (release of 31DEC13) begins<br>UVMOD1: UVGET: doing no flagging this time<br>UVMOD1: Create AB4 .UVMOD . 1 (UV) on disk 1 cno 3<br>UVMOD1: UVMOD TYPE( 001) = 'POIN'<br>
UVMOD1: UVMOD IMAX( 001) = 0.0000E+00 / in Jy.<br>UVMOD1: UVMOD QMAX( 001) = 0.0000E+00 / in Jy.<br>UVMOD1: UVMOD UMAX( 001) = 0.0000E+00 / in Jy.<br>UVMOD1: UVMOD VMAX( 001) = 0.0000E+00 / in Jy.<br>UVMOD1: UVMOD GPOS(1, 001) = 0.0000E+00 / in Arcsec.<br>
UVMOD1: UVMOD GPOS(2, 001) = 0.0000E+00 / in Arcsec.<br>UVMOD1: UVMOD FLUX = 0.0000E+00 / noise added in Jy./Wgt.<br>UVMOD1: UVMOD FACTOR = 1.6413E+00<br>UVMOD1: Copied OF file from vol/cno/vers 1 2 1 to 1 3 1<br>
UVMOD1: Updating tables for IF/FREQID/channel selection<br>UVMOD1: Reformatted AN file from vol/cno/vers 1 2 1 to 1 3 1<br>UVMOD1: Copied WX file from vol/cno/vers 1 2 1 to 1 3 1<br>UVMOD1: Appears to have ended successfully<br>
UVMOD1: ubuntu 31DEC13 TST: Cpu= 0.0 Real= 0 IO= 3<br>AIPS 1: Resumes<br>AIPS 1: UVMOD was not found to be running<br>><br>>task 'dbcon'<br>>getn 3<br>AIPS 1: Got(1) disk= 1 user=3666 type=UV AB4.UVMOD.1<br>
>get2n 1<br>AIPS 1: Got(2) disk= 1 user=3666 type=UV 0830+115.SPLIT.1<br>>dopos 1,-1<br>>doarray =-1 <br>>go;wait<br>DBCON1: Task DBCON (release of 31DEC13) begins<br>DBCON1: RA does not match, will shift second<br>
DBCON1: DEC does not match, will shift second<br>DBCON1: RA AXIS HAS UNEQUAL ATTRIBUTES<br>DBCON1: Purports to die of UNNATURAL causes<br>DBCON1: ubuntu 31DEC13 TST: Cpu= 0.0 Real= 0<br>AIPS 1: Resumes<br>
AIPS 1: DBCON was not found to be running<br><br></div></div>