Comparison of EISCAT and ionosonde electron densities: application to a ground-based ionospheric segment of a space weather programme
Space weather applications require real-time data and wide area observations from both ground- and space-based instrumentation.From space, the global navigation satellite system - GPS - is an important tool.From the ground the incoherent scatter (IS) radar technique permits a direct measurement up to the topside region, while ionosondes give good m