A satellite navigation system is a system that uses satellites to provide autonomous geo-spatial positioning. It allows small electronic receivers to determine their location (longitude, latitude, and altitude/elevation) to high precision (within a few centimetres to metres) using time signals transmitted along a line of sight by radio from satellites. The system can be used for providing position, navigation or for tracking the position of something fitted with a receiver (satellite tracking).

However it can be susceptible to interference caused by natural physical phenomena, mainly induced by cosmic radiations. Therefore, it is necessary to globally monitor and potentially compensate these influences in order to reduce or eliminate communication discontinuities.

One such monitoring system was addressed in the frame of the “Monitor 2: Ionospheric Monitoring Network” project.