Figure 1
Download original image
First Panel: IGS TEC data at 70°N, 20°E with 2 h temporal resolution. Second Panel: Ionosonde observation of critical frequency of the F2 layer, foF2, at Tromsø ionosonde TR169. Third Panel: height of F2 layer, hmF2, at Tromsø ionosonde TR169. Fourth Panel: Equivalent slab thickness at Tromsø ionosonde TR169. All data is gridded per UT and day (Local time is UT+1.3 h). Grey colors represent data gaps.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.