Base station files are written hourly to our FTP server in both Trimble DAT and the international RINEX file types. All files have been zipped using PKZIP.  Files must be unzipped using a product such a WinZip® or any other package than can unzip files.

Files will be kept on the server for only two weeks; after that they will be archived and available for a small data  retrieval fee.  For assistance or more information, you can contact the lab at (501) 569-8534.

Downloading Procedures

File Names:  All files are named based on UTC time.
The format is - YYMMDDHH (Year;Month;Day;Hour) where hour is in UTC time.

World Wide Web

The current browsers of today can be used as an FTP client.  Therefore, all of our files are on our FTP server and not on the WWW server.

1. Go to - ftp://144.167.24.67

2. Click on one of the following, depending on your needs:

       "dat" - Trimble DAT files

       "rinex" - International RINEX files

       "almanac" - GPS satellite information.

3. Click on file to begin downloading

File Transfer Protocol - FTP

For those of you who do not have browsers with FTP capabilities:

1. ftp argis.ualr.edu

         Login: Anonymous     Password: valid email address

2. ftp> binary (when downloading binary file i.e. base files)

3. ftp> ls (to list directories)

4. ftp> cd <foo> (Change Working Directory to one of the following for what you need:)

       dat - Trimble DAT files

       rinex - International RINEX files

       almanac - GPS satellite information

5. ftp> ls (to list files)

6. ftp> get <filename>   (example:  ftp> get 98081018.zip)

UNIVERSITY OF ARKANSAS AT LITTLE ROCK