ferret "loses" some metadata...

[strandwg@xxxxxxxx (Gary Strand)]

What I mean is:
-------------------------------------------------------------------------------
 ! NOAA/PMEL TMAP
 ! FERRET v5.40  
 ! Solaris 5.6 - 02/15/02
 !  6-Mar-02 08:55     
use A.nc
let tsb = ts
save/file=B.nc tsb
quit
-------------------------------------------------------------------------------

ncdump -h A.nc:
-------------------------------------------------------------------------------
netcdf A {
dimensions:
        time = UNLIMITED ; // (1 currently)
        lat = 64 ;
        lon = 128 ;
variables:
        float TS(time, lat, lon) ;
                TS:long_name = "Surface temperature" ;
                TS:units = "K" ;
                TS:time_rep = "averaged" ;
        float lat(lat) ;
                lat:long_name = "latitude" ;
                lat:units = "degrees_north" ;
        float lon(lon) ;
                lon:long_name = "longitude" ;
                lon:units = "degrees_east" ;
        double time(time) ;
                time:long_name = "simulation time" ;
                time:units = "days since 0000-09-01 00:00:00" ;

// global attributes:
                :Conventions = "CSM NetCDF Convention Version 0.0" ;
                :platform = "Data converted from CCM History Tape Format" ;
                :case = "B11.07" ;
                :title = "" ;
[and a lot more info in the netCDF file]
-------------------------------------------------------------------------------

ncdump -h B.nc:
-------------------------------------------------------------------------------
netcdf B {
dimensions:
        LON = 128 ;
        LAT = 64 ;
        LATedges = 65 ;
        TIME = UNLIMITED ; // (1 currently)
variables:
        double LON(LON) ;
                LON:units = "degrees_east" ;
                LON:modulo = " " ;
                LON:point_spacing = "even" ;
        double LAT(LAT) ;
                LAT:units = "degrees_north" ;
                LAT:point_spacing = "uneven" ;
                LAT:edges = "LATedges" ;
        double LATedges(LATedges) ;
                LATedges:edges = " " ;
        double TIME(TIME) ;
                TIME:units = "days since 0000-09-01 00:00:00" ;
                TIME:time_origin = "01-SEP-0000 00:00:00" ;
        float TSB(TIME, LAT, LON) ;
                TSB:missing_value = -1.e+34f ;
                TSB:_FillValue = -1.e+34f ;
                TSB:long_name = "TS" ;
                TSB:history = "From A.nc" ;

// global attributes:
                :history = "FERRET V5.40    6-Mar-02" ;
}
-------------------------------------------------------------------------------

Is there any particular reason FERRET can't maintain all the metadata from the
file, especially when the data is completely unchanged?

--
/\        Gary Strand (303) 497-1336                                NCAR ML262A
  \_][    www.cgd.ucar.edu/ccr/strandwg                      1850 Table Mesa Dr
      \___strandwg@ucar.edu                       Boulder, Colorado, USA  80305