Medium Scale Traveling Ionospheric Disturbances detection over Poland by real-time monitoring service

Satellite positioning has a lot of applications. Nowadays is used in civil and environmental engineering, military, tourism and many others. However, the most important and the most common usage of satellite positioning is navigation and related fields, like transportation and logistics. There are many error sources affecting satellite navigation, one of them is the ionosphere and traveling ionosphere disturbances (TID). TIDs are wave-like structures of plasma density and have been believed to be an ionospheric manifestation of atmospheric gravity waves probably caused by geomagnetic activity at high latitude and/or propagated from the lower atmosphere [9]. TIDs with horizontal wavelengths of 100–250 km are classified as medium-scale (MSTIDs) [8]. The period of the MSTIDs varies from 10 minutes to 1 hour with typical amplitude of tenths of a TECU (Total Electron Content Unit) in STEC (Slant Total Electron Content). The velocity of the MSTID is characterized as 50 – 300 m/s [6]. It was already demonstrated that despite this amplitude presence of such disturbances could decrease efficiency of precise GNSS [5, 11].