[gradsusr] concatenating files

[Frank Colby]

Hi GradsUsers,

Does anyone have an easy way to handle GFS Ensemble files?  I have 
output from ensemble runs that have separate files for each ensemble 
member at each forecast hour.  I would like to put the ensemble members 
together into a single file.  I used cat to put two files together as a 
test, and wgrib (these are grib1 files) shows that both ensemble members 
are indeed there.  However, when I use grib2ctl and gribmap to make the 
ctl and index files, and open the file, it only has the first ensemble 
member.   It's as if grib2ctl never read that there was a second 
ensemble member.

What am I missing here?

Thanks,
Frank Colby
UMass Lowell