IDAHO NATIONAL ENGINEERING AND ENVIRONMENTAL LABORATORY

                        GLOBAL POSITIONING SYSTEM COMMUNITY BASE STATION



This message provides information on how to obtain access to Trimble GPS CBS files from the anonymous 

FTP server at the Idaho National Engineering and Environmental Laboratory (INEEL) in Idaho Falls, ID.

This message was last updated 7/1/98.

THE INEEL GPS FTP SITE HAS MOVED. THE NEW ADDRESS IS:   id.inel.gov     /pub/gps



PLEASE READ THE CBSREAD.TXT DOCUMENT IN THE GPS DIRECTORIES FOR UPDATED 

INFORMATION ON THE BASESTATION



NOTES:



The INEEL GPS data is also available at internet address: http://www.fs.fed.us/database/gps/inelcbs.htm



The following address will provide information re: other internet accessible CBS data:  

http://www.fs.fed.us/database/gps/welcome.htm



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On May 7, 1998 between 9:00am and 12:00pm local Mountain Daylight Savings Time (1500-1800 UTC) 

the CBS antenna was changed, remounted and repositioned on the INEEL Research Center. During the 

period of April 28th through May 7th the new antenna had been installed, but not fixed in it’s permanent 

location. Due to these changes, some CBS files may not have accurate reference positions during this 

period. These files are not available on the ftp site, but were archived in the event that they were still 

needed. The following text describes what occurred.



Monday, 4/27/98

The CBS was upgraded to a new L1 antenna with ground plane and Trimble Pro XR receiver at UTC hour 

1800 on 4/28/98. 



Files from i8042818.ssf through i8050714.ssf may have reference positions between 1 inch to 1 foot off 

the true position of the antenna when recording base files. It is likely that the reference position is only 

about 4 inches off.



The system was down between i8042909 and i8050509.



Thursday, 5/7/98

The antenna was repositioned between 1500-1800 UTC. These files are not available.



Files from i8050719-22 were collected after the final position of the antenna was secured; however, the 

surveyed position was not yet entered into the base station setup. Therefore, users of these files must edit 

the reference position to the new reference position below.



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We are keeping a list of users of this base station data to help justify continuous maintenance of the system. 

I would appreciate it if you would e-mail the following information to me:



Name

Phone No.

e-mail address

Address

Organization

Application and location of use

When you started using the system



If you appreciate access to this data and feel compelled to indicate its usefulness, please drop me an e-mail 

note. I will pass this on to my management and DOE which might help to continue this support.