Question about CODIAC ETA files

Bob,
      The answer to your question is that gempak files are not ASCII 
files and should not be concatenated using cat. It will probably corrupt 
the header infomation and conflict the way the gempak library to read 
the infomation from this file. The easiest way for you is to ftp all the 
grib version files, concatenate them and pipe them to the dcgrib2 
decoder. Then GEMPAK will be able to recognize this file. If you have 
any problem to find the dcgrib2 decoder you can use find command to 
locate it, it may be under GEMPAK5.6/bin/irix/dcgrib2 depending on the 
setting of your GEMPAK software. Let me know if you have any problem.

Yuan