ANNOUNCEMENT: Data is temporarily unavailable directly from this site. We are upgrading to a new system to better serve you!

General Operation: Files can be used for Mapping grade GPS (Differential and Carrier Phase solutions) at roughly up to a 150 mile radius from the base location. The reference coordinate in the data files is the static survey coordinate and is fixed, but it is suggested that it be checked against the published data before processing any data. Files can also be used for Post-processed high precision Survey grade GPS (Kinematic, Fast Static, & Static) - just treat this station just like another receiver set on a high precision point and you have an additional baseline. See your receiver manual and/or specifications for details on accuracies.

File Naming: The files are organized in directories according to the type of data i.e. (Almanac, Dat, Rinex, Ssf). The file naming convention is as follows: yymmddhh.exe Where “yy” is used to as the year, “mm” is the month, “dd” is the day, and “hh” is the hour in Universal Time Coordinated (UTC).

Data Storage: Files are normally available on line for 14 days, after which they will be deleted. Data is not archived prior to deletion and is therefore unrecoverable. Users are encouraged to download data as soon as possible. There is a 24 hour latency on files.

To Download Files: To download the files please follow these steps:

1. Select the file format that you are interested in downloading from the list below:
   
   SSF
   
   RINEX
   
   DAT
   
   ALMANAC



2. Select the file name that you wish to copy to your computer.
3. When asked, specify the location on your hard drive where you want to store the file.
4. Repeat step three until the file(s) are copied to your system.
5. Double click on each file to uncompress it.
6. You are now ready to use the file(s) for differential correction.
   

DATA USE WARNING: St. Louis Community College is providing this information in good faith and shall in no event be liable for any lost profits, and special, indirect or consequential damages to any party, arising out of or in connection with the use or the inability to use the data hereon or the services provided. St. Louis Community College provides this data and it's services as a convenience to the public. Furthermore, St. Louis Community College reserves the right to change, revise, or otherwise discontinue published data and/or these services at any time without further notice.

For more information contact Rich Unger, Civil Engineering, at 314-513-4319 or email him at: runger@stlcc.edu