Providers' Forum

United States of America

  • The Global Postioning System (GPS) is a United States space-based radio-navigation system that provides reliable positioning, navigation, and timing services to users on a continuous worldwide basis-freely available to all. The outstanding performance of GPS over many years has earned the enduring confidence of millions of international users. With its ongoing modernization programme, GPS will continue to provide superb quality and performance in the future.
  • The Wide Area Augmentation System (WAAS) augments GPS over the North American territory to provide the additional accuracy, integrity and availability needed to enable users to rely on GPS for safety-critical applications, particularly in the field of aviation.

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Russian Federation

  • The Russian GLObal NAvigation Satellite System (GLONASS), navigation satellite system is based on a constellation of active satellites which continuously transmit coded signals in two frequency bands that can be received by users anywhere on the Earth's surface to identify their position and velocity in real time based on ranging measurements. In the future a third frequency for GLONASS signal transmission will be introduced. In some areas of application, the use of combined GPS, GLONASS and GALILEO constellation appears to be preferable option.
  • The System of Differential Correction and Monitoring (SDCM) is intended for development and real-time transfer of the adjusting information for GLONASS, GPS and GALILEO systems (integrity data, wide-area and local correction data) to civilian customers. It is expected that SDCM based on GLONAS/SGPS signals will provide increased (in comparison with basic level) accuracy of position determination in real time at any point in the Russian Federation.

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European Union

  • The European Satellite Navigation System (GALILEO), an initiative launched by the European Commission and the European Space Agency, will be a global navigation satellite system, owned by the European Union providing highly accurate, guaranteed global positioning services under civilian control. The Galileo Open Services signal will be interoperable with the GPS civil signal, as well as with GLONASS.
  • The European Geostationary Navigation Overlay Service (EGNOS) is a Satellite-based Augmentation System (SBAS) providing service for safety critical applications in Europe. As a first element of European GNSS capabilities, EGNOS will be integrated in the GALILEO programme.

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The existing three-satellite COMPASS/BeiDou navigation system has played an important role in offering efficient positioning, timing, communication services and differential GPS information in surveying, telecommunications, transportation, meteorology, forest fire prevention, disaster forecast and public security areas. On the basis of the COMPASS/BeiDou Navigation Test System, China has started to build a system with global coverage.


The GPS aided Geo Augmented Navigation (GAGAN/IRNSS) has been taken up with an objective to demonstrate the Satellite-based Augmentation System (SBAS) technology over the Indian region. It is planned to be an operational system to provide a seamless navigation facility in the region, which is interoperable with other SBASs. Although primarily meant for civil aviation, it is beneficial for the other users.


  • The MTSAT (Multi-functional Transport Satellite) Satellite-based Augmentation Systems (MSAS) is one of the SBASs (Satellite-based Augmentation System) compliant with ICAO Standards and Recommended Practices (SARPs). This system provides navigation services for all the aircraft within Japanese airspace via two geostationary satellites (MTSAT-1R and MTSAT-2).
  • The Quasi-Zenith Satellite System (QZSS), promoted by Japan, is the Asian and Oceanian regional system that will serve as enhancement for GPS. QZSS was designed so as to guarantee that at any time at least one of its three satellites is close to the zenith over Japan.

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