1.  NAME

  prefabs - Plot absolute reference layer velocities

  2.  USAGE

  prefabs

  3.  DESCRIPTION

  This Matlab script plots the absolute reference layer velocities as
  output from refabs.  It is a user interface to functions prefabs1(3m)
  and prefabs2(3m).  It can be usefull for looking at the results
  obtained from different navigation sources, or different layers, and
  select the best solution for position fixes.

  4.  PARAMETERS

  The following parameters must be edited:

     file file_1 file_2
        Name of input file(s) (output of refabs).  If two different
        datasets are to be compared together,both input files file_1 and
        file_2 should be specified. If only a single dataset is to be
        plotted,the input file may be specified in either file,file_1 or
        file_2.

     str_1 str_2
        Short string that refers to dataset(s) in file_1 and file_2.
        This parameter is ignored when only one dataset is given.

     psfile
        Name of output postscript file.

     new_ps
        If true,the given postscript file will be deleted before
        creating the plots. Else,plots are appended to it.

     velocity_unit
        String specifying the unit used for velocities.

     year_base
        Year base used for decimal days in input file.

     cruise
        Name of cruise.

     note
        Additionnal note to print on plot.

     min_speed
        Minimum allowed speed,in m/s. This should be the same value that
        will be used later in smoothr.

     max_speed
        Maximum allowed speed,in m/s. This should be the same value that
        will be used later in smoothr.

     ens_time
        The ensemble time length,in minutes.

  5.  SEE ALSO

  prefabs(1m) prefabs1(3m) prefabs2(3m) preflyr(1m) preflyr1(3m)
  preflyr2(3m) psmooth1(3m) psmooth2(3m) psmoothr(1m)

  6.  AUTHORS

  Pierre Jaccard, Geophysical Institute, University of Bergen, 1999