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Fig. 7 | Earth, Planets and Space

Fig. 7

From: Occurrence of F region echoes for the polar cap SuperDARN radars

Fig. 7

ad Smoothed average values of the echo occurrence rate for the Clyde River (CLY) and Inuvik (INV) radars as a function of the F region peak electron density (inferred from concurrent and co-located Rankin Inlet (RKN) elevation angle measurements). All noon sector data collected in 2013–2017 were considered. Individual curves in each panel correspond to three bins of the E × B plasma flow magnitude of 50–250 m/s, 250–400 m/s, and > 400 m/s. Also presented in each panel is the total number of 15-min intervals available to build each curve. eh Smoothed average values of the echo occurrence rate for the CLY and INV radars versus the E × B plasma flow magnitude. Individual curves in each panel correspond to four bins of the F region peak electron density of \( < 2 \times 10^{11} \,{\text{m}}^{ - 3} \), \( (2 - 3) \times 10^{11} \,{\text{m}}^{ - 3} \), \( (3 - 4) \times 10^{11} \,{\text{m}}^{ - 3} \), and \( > 4 \times 10^{11} \,{\text{m}}^{ - 3} \). The linear fit lines are shown for each set of points

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