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Earth, Planets and Space
Fig. 2 | Earth, Planets and Space

Fig. 2

From: Ionospheric irregularity behavior during the September 6–10, 2017 magnetic storm over Brazilian equatorial–low latitudes

Fig. 2

Geographic location of São Luís (Digisonde, AFRL VHF and GPS Novatel and Septentrio receivers) is represented by blue star. The ionospheric piercing point (IPP) for the eastward VHF link is represented by the red circle. LISN (Low-Latitude Ionospheric Sensor Network) GPS Novatel receiver sites are shown as stars, except for Belém where there is just one magnetometer. The star is green at Petrolina where there is another magnetometer besides the LISN GPS receiver. SWARM-A satellite tracks ground projections are shown in green for the quiet day 03, in red for the first storm day 07 and in blue for the second storm day 08. The thick dashed line is the magnetic equator for September 2017, and the thin dashed lines represent the dip latitudes for each 10°

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