GNSS Services

Nowadays GNSS are widely used to measure positions in the frame of many applications of which accuracy ranges from a few mm (Geodesy) to about 10 m (navigation). The influence of the ionosphere on radio signals emitted by GNSS satellites remains the main limitation to the accuracy and to the reliability of most of these applications. Indeed, Space Weather can be the origin of disturbed conditions in the ionospheric activity which strongly affects GNSS applications. Usually, users are not aware about the occurrence of degraded positioning conditions. Therefore, it is indispensable to monitor GNSS integrity against ionospheric threats and to provide GNSS users with information about ionospheric influence on their applications.

SWANS provide users with qualitative information about ionospheric activity effects on the Real Time Kinematic (RTK) positioning technique. Other products are being developed.