Figure 3
From: The ionospheric irregularities climatology over Svalbard from solar cycle 23
Climatology maps of occurrence of σΦ ≥ 0.25 radians obtained by using a cutoff frequency νc of 0.1 Hz (panel a), 0.25 Hz (panel c), 0.4 Hz (panel b) and 1.0 Hz (panel d). (Panel e) Climatology map of occurrence of S4 ≥ 0.25. All maps refers to GPS observations on 2016.
