Provides overview of the GPS program and launches.
Provided overview and news about the GALILEO satellite navigation system being constructed in Europe.
Provides overview of the Russian satellite navigation system. Includes orbital data, user information and constellation history.
Offers general system information and industry related material by the consortium building the system.
Introduction to the Galileo system provided by the European Space Agency.
Provides information on the Chinese cooperation in European global navigation space systems.
Offers overview of USA's involvement in the Galileo program.
Magazine offering on-line news and updated reference information in space and ground GNSS systems.
News and background information by a consortium set up to operate the Galileo satellite navigation system.
United States joint-military-service, multi-national organization responsible for the global positioning constellation, operational control segment, and user equipment. Technical and programmatic information.
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