; SELSD
;---------------------------------------------------------------
;! Task to select random position single dish measurments
;# TASK SINGLEDISH
;-----------------------------------------------------------------------
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;;
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;-----------------------------------------------------------------------
;---------------------------------------------------------------
SELSD     LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC
SELSD     Task to select random position single dish measurments
INNAME                             Input UV file name (name)
INCLASS                            Input UV file name (class)
INSEQ             0.0     9999.0   Input UV file name (seq. #)
INDISK            0.0        9.0   Input UV file disk unit #
                                   Cal. info for input:
DOCALIB          -1.0        2.0   If >0 calibrate data
GAINUSE                            CS table to apply
FLAGVER                            Flag table version
OPTYPE                             Projection code e.g. '-SIN'
OUTNAME                            Output UV file name (name)
OUTCLASS                           Output UV file name (class)
OUTSEQ            0.0     9999.0   Output UV file name (seq. #)
OUTDISK           0.0        9.0   Output UV file disk unit #.
APARM                              1,2,3 = RA (h,m,s)
                                   4,5,6 = Dec (d,m,s)
                                   7,8   = field of view (asec)
NPOINTS          -1.0              Max # 1000's of visibilities
----------------------------------------------------------------
SELSD
Task:  This task will select random position single dish data
       in AIPS uv form in a specified field of view about a
       specified position and project the coordinates onto the
       specified coordinate system.   Unprojected coordinates
       will have random parameters 'RA     ', and 'DEC     '
       whereas a file containing projected coordinates will have
       'RA--xxxx' and 'DEC-xxxx' random parameters where xxxx is
       the projection code.
       The following applies only to an older form:
          Notes on units:   The "U" and "V" are assumed
       to be RA and Dec in degrees unless the data appears to
       be interfermeter data with no W random parameter; in
       this case "U" and "V" are assumed to be in degrees
       times the frequency in HZ.  This latter is for
       historical reasons.
Adverbs:
  INNAME.....Input single dish data file name (name).
  INCLASS....Input single dish data file name (class).
  INSEQ......Input single dish data file name (seq. #).
  INDISK.....Disk drive # of input single dish data file.
  DOCALIB....If true (>0) then calibrate the data using information in
             the specified CS table.
  GAINUSE....Version number of the CS table to apply to the
             data if DOCALIB=1.  0 = highest numbered.
  FLAGVER....(multisource) specifies the version of the
             flagging table to be applied. 0 => highest
             numbered table.  <0 => no flagging to be applied.
  OPTYPE.....Projection code:
             '-TAN' = tangent projection (optical),
             '-SIN' = sine projection (normal interferometer),
             '-ARC' = arc projection (Schmidt camera, single
                      dish images),
             '-NCP' = North celestial pole (WSRT),
             '-STG' = stereographic projection,
             '-AIT' = Aitoff projection, (large field)
             '-GLS' = Global sinusoidal projection (large field)
             '-MER' = Mercator projection,
             '    ' => '-SIN'
             See AIPS memo nos. 27 and 46 for more detail.
  OUTNAME....Output file name (name).  blank => INNAME
  OUTCLASS...Output file name (class).  blank => INCLASS
  OUTSEQ.....Output file name (seq. #). 0 => lowest unique
  OUTDISK....Disk drive # of output UV file.  0 => highest with
             space for the file.
  APARM......1,2,3 are the RA as (h,m,s)
             4,5,6 are the Dec, as (d,m,s)
             7,8   are the field of view in RA and Dec (asec)
             The specified position is the CENTER of the RA
             range and the BOTTOM of the declination range.
             If APARM(4) is -0 then use APARM(4)=-0.1.
  NPOINTS....Select a maximum of NPOINTS*1000 UV points.
             0 => All in input file.
----------------------------------------------------------------
