A GPS GIS Systems Source
GPS Differential Correction Files

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Here is a one-stop site for the latest in GPS Internet differential corrections (DGPS). The Internet-enabled DGPS base stations are growing daily. The new Trimble Pathfinder Office software provides an easy access to even more Internet DGPS locations.

GPS Base Stations on the Internet
Here is the "mother" of GPS Community Base Stations on the Internet. Just click a red dot on a US map and you have direct access to over 50 GPS base stations, Internet ready!

USFS Sacamento, CA
One of the original base stations in California. Operated by Kevin Casey, Remote Sensing Lab, reliable and accurate.

Michigan State CBS
Download Trimble Community Base Station files from MSU Campus at East Lansing, Michigan

BLM Winnemucca Nevada
Let's hear it for the BLM in Nevada. Winnemucca may be in remote Northern Nevada but it is right on Internet cutting edge technology. It shows that location no longer matters due to the World Wide Web.

Radio Beacon Coverage from Trimble
A one-stop site to find radio beacon coverage worldwide. You can view text files with details on frequency.

Las Vegas Valley WD
The Las Vegas Valley Water District has an outstanding base station setup. They offer three file formats: SSF, DAT and Rinex. It is easy to pick the format choice. At the home page, look at the far left frame and select "Data Share."

Mammoth Community Water District
California-based Mammoth WD operates a base station in Mammoth Lakes, CA. The CBS operates in synchronous mode with all the bells and whistles.

U.S. CORS Network Stations
U.S. Network of over 80 precision reference stations for downloading. Map shows locations with button reference to specific stations.

University of Rhode Island
Located in Kingston, Rhode Island, operating a Trimble CBS with 12 channels.

The Idaho National Engineering Lab
Located in Idaho Falls, Idaho, CBS files are accessed via an FTP server. Base station is set to sync mode.

Southern California Integrated GPS Network
Obtain data from over 40 SCIGN reference stations. Go to "SCIGN data archive" on home page to download GPS files.

BARD Northern California Continuous GPS Network
BARD is a network of about 20 continuously operating GPS receivers in northern California. Data is available in RINEX format.

Columbia Environmental Research Center
Trimble Community Base Station in Columbia, Missouri

University of Arkansas Trimble CBS
Trimble Community Base Station at UA in Fayetteville, Arkansas. Try differential correction at a distance.

University of New Mexico Trimble CBS
Trimble Community Base Station files from UNM campus at Albuquerque, New Mexico

US Forest Service, CBS Gateway
One-stop access to Forest Service and Private Community Base Stations in the United States, includes 24 states and 40 Internet access Trimble base stations.

Naval Air Warfare Center
Courtesy the U.S. Naval Warfare Center, Weapons Division, Chinalake, CA. A Trimble CBS produces hourly SSF files. CBS is 12 channels.

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