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Earth, Planets and Space
Fig. 5 | Earth, Planets and Space

Fig. 5

From: Comparison between IRI and preliminary Swarm Langmuir probe measurements during the St. Patrick storm period

Fig. 5

Electron densities measured by Swarm satellites and IRI for period P1, for the morning sector. Electron densities measured by Swarm A (top-right panels) and Swarm B (bottom-right panels), and the corresponding ones calculated by IRI-NeQuick(StON) (top-left panels) and IRI-2001corr(StON) (bottom-left panels), for the period P1, for the morning sector. Magnetic latitude bands between −60° and 60° are plotted in a Gall stereographic projection, while the high-latitude bands are plotted in an orthographic projection (on the left the north pole, on the right the south pole). Coordinates are geographical, and bold lines in both Gall stereographic projections and polar orthographic projections represent magnetic parallels drawn with a 30° step. Due to the large difference between N e values measured by Swarm A and B and those estimated by IRI, it is not possible to draw the values into the Gall stereographic projections with the same color scale

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