Fig. 3From: Comparison between IRI and preliminary Swarm Langmuir probe measurements during the St. Patrick storm periodSwarm A electron density during periods P1 and M2 in the morning and evening sector. Electron density as measured by Swarm A during a the pre-storm period P1 in the morning sector (04-12 MLT), and b during the main phase period M2 in the evening sector (16-24 MLT)Back to article page