[daip] Aips Question

[Danielle Lucero]

Hi Eric,

As you know I have been working on combining some recent EVLA data with
some WSRT data.  I have managed to process the data sets such that when I
image them the velocity range, center velocity, and channel width are
correct.  The emission in both data sets appears in the same channels.
However, I have the problem that the headers look different.  The two image
headers are pasted below.  I am not sure how to change the specific header
values.  Not sure which values correspond with which ctype and crval and
cdelts, etc to use.

Danielle


AIPS 1: Image=ugc09519  (UV)         Filename=UGC9519WSRT .UVSRT .   2
AIPS 1: Telescope=WSRT               Receiver=WSRT
AIPS 1: Observer=ProcessD            User #=   22
AIPS 1: Observ. date=13-JUL-2008     Map date=10-FEB-2013
AIPS 1: # visibilities     52997     Sort order  TB
AIPS 1: Rand axes: UU-L  VV-L  WW-L  BASELINE  TIME1
AIPS 1: ------------------------------
----------------------------------
AIPS 1: Type    Pixels   Coord value     at Pixel     Coord incr   Rotat
AIPS 1: COMPLEX      3   1.0000000E+00       1.00  1.0000000E+00    0.00
AIPS 1: STOKES       2  -5.0000000E+00       1.00 -1.0000000E+00    0.00
<------- (this is -5 while the other data set has -1 not sure what this
means)
AIPS 1: FREQ        85   1.4223603E+09     149.65  9.4209562E+04    0.00
<------- (still has a reference with respect to pixel 149)
AIPS 1: RA           1    14 46 21.102       1.00       3600.000    0.00
AIPS 1: DEC          1    34 22 14.502       1.00       3600.000    0.00
AIPS 1: ----------------------------------------------------------------
AIPS 1: Coordinate equinox 2000.00
AIPS 1: Rest freq   1420.406         Vel type: OPTICAL wrt SUN
AIPS 1: Alt ref. value -4.27695E+05  wrt pixel  149.65
AIPS 1: Maximum version number of extension files of type HI is   1
AIPS 1: Maximum version number of extension files of type FO is   1
AIPS 1: Maximum version number of extension files of type AN is   1
AIPS 1: Maximum version number of extension files of type FQ is   1
AIPS 1: Maximum version number of extension files of type NX is   1


-----
AIPS 1: Image=UGC9519   (UV)         Filename=U9519       .SPECR .   1
AIPS 1: Telescope=EVLA               Receiver=EVLA
AIPS 1: Observer=Katherin            User #=   22
AIPS 1: Observ. date=25-JUL-2012     Map date=24-AUG-2012
AIPS 1: # visibilities   5464880     Sort order
AIPS 1: Rand axes: UU-L-SIN  VV-L-SIN  WW-L-SIN  TIME1  BASELINE
AIPS 1:            INTTIM
AIPS 1: ----------------------------------------------------------------
AIPS 1: Type    Pixels   Coord value     at Pixel     Coord incr   Rotat
AIPS 1: COMPLEX      3   1.0000000E+00       1.00  1.0000000E+00    0.00
AIPS 1: STOKES       2  -1.0000000E+00       1.00 -1.0000000E+00    0.00
AIPS 1: FREQ        85   1.4085875E+09       1.00  9.4117648E+04    0.00
AIPS 1: IF           1   1.0000000E+00       1.00  1.0000000E+00
0.00            <----- (entry missing in the other data set)
AIPS 1: RA           1    14 46 21.127       1.00       3600.000    0.00
AIPS 1: DEC          1    34 22 14.340       1.00       3600.000    0.00
AIPS 1: ----------------------------------------------------------------
AIPS 1: Coordinate equinox 2000.00
AIPS 1: Rest freq   1420.406         Vel type: OPTICAL wrt SUN
AIPS 1: Alt ref. value  1.69200E+06  wrt pixel   43.50
AIPS 1: Maximum version number of extension files of type NX is   1
AIPS 1: Maximum version number of extension files of type FO is   1
AIPS 1: Maximum version number of extension files of type FQ is   1
AIPS 1: Maximum version number of extension files of type AN is   1
AIPS 1: Maximum version number of extension files of type WX is   1
AIPS 1: Maximum version number of extension files of type HI is   1
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