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Arlene, Here is the basic GEMPAK download information you mentioned needing while in DC. The information you need to download gempak is: host: ftp.unidata.ucar.edu login: gbuddy passwd: XXXXXX Please record the above information for your records. Here are the general source download and building instructions. If you are running Solaris x86 or Linux, you can download binary distributions for these platforms. In particular, GEMPAK requires Motif which is not part of Linux (must be purchased separately), so you would likely need to download the binary distribution. The source distribution for building is found under ~gbuddy/nawips-5.4/gempak54upc_pl16.tar.gz The current tar file is patched through patch level 16. To build Gempak from source, download and unpack the distribution into a clean directory. Edit the csh file Gemenviron in the top directory and define the NAWIPS environmental variable to be the directory you unpacked into. Source the Gemenviron variables into your csh environment to define $NAWIPS and all the tree locations relative to NAWIPS. Then, if your system is standard configuration for Solaris, Solaris for Intel (X86) IRIX, OSF/1, AIX, Linux, HPUX- you should be able to just type "make all", followed by "make install" when the compilation finishes. If you have libraries in non-standard places, then the $NAWIPS/config/Makeinc.xxxxx file for your OS would have to be modified. You should not modify the optimization levels since some compilers don't work well with aggressive optimization. Documentation for GEMAPK can be found as postscript files under the $NAWIPS/doc/User_Guide directory, as well as online at: http://www.unidata.ucar.edu/packages/gempak/tutorial/ All users that use Gempak should source Gemenviron into their csh environment to define the Gempak variables and add the executable directory into their path. Once the distribution is installed, you can edit the data directory locations defined in Gemenviron- but thats not a priority for building. Plese refer all questions about the distribution and any problems you may have to address@hidden. You may also wish to subscribe yourself to the gembud email list at: http://www.unidata.ucar.edu/mailinglist/mailing-list-form.html Announcements about the GEMPAK distribution, including new distributions, patches, and feature enhancements are made through that list. Also, if you have information or need to find other users who may have experience with a specific data set, then you are encouraged to use the email list which is composed of fellow GEMPAK users in our community. Once you have GEMPAK installed, you can use the "dc" realtime data decoders with the LDM package to decode the data into GEMPAK format as it arrives at your site. Refer to the LDM web pages for the installation of LDM and getting connected to the IDD. Examples of LDM pqact.cont pattern/action entries for the various types of data for the GEMPAK decoders are found in the tutorial as well as in the Examples section of the GEMPAK www pages. Steve Chiswell