Grib Shell

The nbsp package contains two tools for viewing the grib files processed by the gribfilter:

nbspgribsh (local use)
nbspgribrsh (remote use)

There is a separate nbspclient package that contains only the nbspgribrsh tool. Both are Tk scripts which do some minor bookeeping and eventuallly can call GrADS. This short note explains the usage of the two. The file gribsh.README has more details about how the tools work, and the configuration options. This not is a short tutorial to get going quickly.

nbspgribsh is meant to be used in the same machine in which nbsp is running. nbspgribrsh does similar work but contacts a remote machine running nbsp. Let us start with nbspgribsh.

In a terminal window, execute
```
  nbspgribsh
  
```
In the window that opens, click on the File list menu and choose gfs (or any other model). Then choose a particular date-time in the submenu, and again a particular file in the following submenu, such as 2008110906_gfs_yqb.
Click on the GrADS menu. That will open two windows: one for entering GrADS commands and the ither for display.

In the GrADS command window type the following

  set gxout shaded
  d tmpprs
  set gxout contour
  d tmpprs
  printim example.png
  quit

That will plot a surface temparature map in the GrADS display and you will be left with the image file example.png that can be displayed with any image viewer.

nbspgribrsh on the other hand, contacts a remote machine. For example, if the remotre machine is www.opennoaaport.net then nbspgribrsh is invoked thus

  nbspgribrsh http://www.opennoaaport.net:8015/grib

nbspgribrsh presents a menu similar to the one decscribed above, except that the files are located in the remote computer. The steps in the previous tutorial can be repeated, except that that initially it will take a fe seconds while the program downloads the data files from the remote server.

webmaster@noaaport.net
Mon Nov 10 13:00:06 AST 2008