19991201: gdvint, pres to eta

>From: "Matthew G. Fearon" <address@hidden>
>Organization: Desert Research Institute
>Keywords: 199912020054.RAA17424

>Steve,
>
>I am trying to convert pressure grids to eta. The following
>is what I have my gdvint program set to. Things
>are not working correctly. Could you please
>let me know what settings should be changed.
>This is an old pres/sgma coversion that I tried
>to modify for eta.
>
>
>$GEMEXE/gdvint <<EOF
>   gdfile   = /data1/gempak/grids/sigma.gem
>   gdoutf   = /data1/gempak/grids/eta.gem
>   gdattim  = f00
>   glevel   = 8000-4500-500;9950-8050-50
>   gvcord   = pres/eta:1
>   maxgrd   = 1500
>   garea    = grid
>   vcoord   = none
>   r
>
>Thank you,
>Matt Fearon
>address@hidden
>

Matt,
You actually need "etap" instead of just "eta" as the output coordinate,
eg: 
pres/etap:1

This is an artifact of 4 letter vertical coordinate naming conventions.

Steve Chiswell