AIPS NRAO AIPS HELP file for UVGLU in 31DEC21



As of Wed May 5 15:37:27 2021


UVGLU: Task which glues uv frequency blocks back together

INPUTS

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 #
IN2NAME                            Second UV file name (name)
IN2CLASS                           Second UV file name (class)
IN2SEQ            0.0     9999.0   Second UV file name (seq. #)
IN2DISK           0.0        9.0   Second UV file disk unit #
OUTNAME                            Output UV file name (name)
OUTCLASS                           Output UV file name (class)
OUTSEQ           -1.0     9999.0   Output UV file name (seq. #)
OUTDISK           0.0        9.0   Output UV file disk unit #.

HELP SECTION

UVGLU
Task:  This task will try to glue the spectral line data from
       the second file onto the spectral line data of the first
       file, creating a file with the sum of the number of
       channels. It will only work if the databases are perfect-
       ly matched. Headers should only differ in frequency and
       the highest frequency + 1 of the first file should be the
       first frequency in the second.
Adverbs:
  INNAME.....Input UV file name (name).      Standard defaults.
  INCLASS....Input UV file name (class).     Standard defaults.
  INSEQ......Input UV file name (seq. #).    0 => highest.
  INDISK.....Disk drive # of input UV file.  0 => any.
  IN2NAME....Second file name.
  IN2CLASS...Second file class
  IN2SEQ.....Second file sequence number.
  IN2DISK....Second file sequence number.
  OUTNAME....Output UV file name (name).     Standard defaults.
  OUTCLASS...Output UV file name (class).    Standard defaults.
  OUTSEQ.....Output UV file name (seq. #).   0 => highest unique
  OUTDISK....Disk drive # of output UV file. 0 => highest with
             space for the file.

EXPLAIN SECTION

UVGLU Glues UV data frequency blocks back together
DOCUMENTOR: H.J. van Langevelde (Sterrewacht Leiden)

                          PURPOSE

    UVGLU will check the headers of the two input files. If it
decides that these match perfectly (not considering any spectral
line information), it will than check that the second file
contains the next block in frequency. When this is OK it will
create the output file in which the number of channels will be
the sum of the number of channels in the input files and copy
the visibilities in the proper place. While doing this it checks
whether the visibilities indeed come from the same baseline.
Values for the random parameters in the output file are copied
from the first input file. The header of the first input file
is used to create the output header, keeping the right reference
frequency for the u,v,w values.

UVGLU does not require that the number of visibility points in each
file agree exactly. If the files do differ in size it is assumed that
the data in each file are sorted in time-baseline order.

    UVGLU is useful in big spectral line experiments where you
may want do deal with chunks of spectral line at the time. Use
UVCOP to split your data up and UVGLU to put them back together.













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