[daip] Re: Galactic Coordinates for SDIMG ?

[Eric Greisen]

Glen Langston writes:

 > Hope you are well and enjoying the start of cooler weather in
C'ville.

      I live in Socorro since April 2000.

 > Unfortunately, SDIMG does not seem to like Galactic coordinates.
  
        No there is an error in the data

 > See messages below.
 > Is there some easy way to force SDIMG to use some type of galatic
coordinate?

        Fix the error - see below

 > PS I have a program that has only two arguments, the input GBTIDL
 > FITS file and the output AIPS SDFITS file.
 > The second question is how hard would it be to imbed this program
 > in a new version of UVLOD (ie GBTLD) that could run the imbedded
 > program with GBTIDL file name and output an AIPS UV FILE in the
 > AIPS context (ie the skip the intermedian step).

        Depends on your program - it could obviously be done.

 > 
 > New file that does not work ----------------------------------
 > >imhe
 > AIPS 1: Image=G133.5+3  (UV)         Filename=G133.5+3.0  .SCANS .   5
 > AIPS 1: Telescope=NRAO_GBT           Receiver=
 > AIPS 1: Observer=Lockman             User #= 1256
 > AIPS 1: Observ. date=31-MAY-2003     Map date=01-SEP-2005
 > AIPS 1: # visibilities       520     Sort order  TB
 > AIPS 1: Rand axes: GLAT  BEAM  TIME1

    Note - no GLON random parameter just a GLAT.  UVPGET will not work
with a single coordinate, it needs both.

 > 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      1024   1.4220053E+09     513.00 -4.8828125E+03    0.00
 > AIPS 1: GLON         1   3.8431837E+00       1.00  1.0000000E+00    0.00
 > AIPS 1: GLAT         1   5.3708227E-01       1.00  1.0000000E+00    0.00
 > AIPS 1: ----------------------------------------------------------------
 > AIPS 1: Maximum version number of extension files of type HI is   1
 > >ins 4
 > >imhe
 > - identical old file but with different header labels - works OK ----------
 > AIPS 1: Image=G133.5+3  (UV)         Filename=G133.5+3.0  .SCANS .   4
 > AIPS 1: Telescope=GBT 100m           Receiver=
 > AIPS 1: Observer=                    User #= 1256
 > AIPS 1: Observ. date=31-MAY-2003     Map date=16-AUG-2005
 > AIPS 1: # visibilities       520     Sort order  TB
 > AIPS 1: Rand axes: RA  DEC  BEAM  TIME1

    Both coords are here

 > 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      1024   1.4220053E+09     513.00 -4.8828125E+03    0.00
 > AIPS 1: RA           1    08 54 00.351       1.00       3600.000    0.00
 > AIPS 1: DEC          1    07 51 00.512       1.00       3600.000    0.00
 > AIPS 1: ----------------------------------------------------------------
 > AIPS 1: Coordinate equinox 2000.00
 > AIPS 1: Maximum version number of extension files of type HI is   1
 > 

Eric Greisen