What is it?
The Modsnd package downloads and processes BUFR sounding files into a format for use by BUFKIT, NAWIPS, NSHARP, and other display packages. These data sets are popular with field forecasters as they originate from the operational model native coordinates and have a temporal resolution greater than that currently available from any gridded operational data source.
What do I need to run modsnd?
Modsnd is designed to run on a workstation running a relatively current linux distribution. That's it.
You will also need a means of displaying these data. NAWIPS, NSHARP (provided with NAWIPS) and BUFKIT are the most popular, although modsnd also outputs the data in a general ASCII text format.
How Do I get it?
Modsnd 5.0 and the README file are available from the link above. You will need to download the modsnd5.tgz and modsnd5.README files. The README file is a quasi-outdated version of the Users Guide. I would use the web version since that is more likely to be up-to-date. Instructions on installation and running modsnd are also provided.