Latest Almanac Data
Latest Almanac files for use with Trimble planning utilities
GPS/GLONASS almanac in Trimble Planning file format
Global Reference Station List
This list currently provides information on over 1000 reference stations throughout the world.
Beacon Reference Station List
The Beacon Station List currently contains details of nearly 200 beacon stations throughout the world.
CORS (Continuously Operating Reference) Stations
GPS reference stations that provide coordinates and data. Data is in RINEX format.
Information and current status on EGNOS (European Geostationary Overlay Service).
GNSS Planning Tool
Trimble GNSS Planning Online.
GPS Status from the Coast Guard
Official operation status of the Global Positioning System as stated by the U.S. Coast Guard's Navigation Information Service (NIS) at http://www.navcen.uscg.gov is based on input from the GPS Control Segment, U.S. Department of Defense and other sources in accordance with the Federal Radionavigation Plan (FRP) and with the Federal Radionavigation Systems (FRS) Document required by 10 U.S.C. 2281 (c ). The FRP is the official source of radionavigation policy and planning for the Federal Government. The FRS covers common-use radionavigation systems, including sections relating to government roles and responsibilities, user requirements, and system descriptions. The NIS Website also provides the user with information on policy changes or developments about radionavigation systems, especially GPS, such as, for example, automatically disseminating GPS status and outage information through a listserver. The NIS also acts as the single focal point for non-aviation civil users to report problems with GPS.
List of Active NANU's (Notice Advisory to Navstar Users)
Current list of NANUs provided by USCG (United States Coast Guard).
GPS CNAV Activation
Customer Notification on GPS CNAV activation to begin April 28, 2014.