Fig. 7From: Sporadic E layer characteristics at equatorial latitudes as observed by GNSS radio occultation measurementsSeasonal sporadic E occurrence rates (gray bars) and mean altitudes (orange line) along a narrow belt (+/−5\(^\circ\)) following the magnetic equator. The upper row displays winter (left) and spring (right) conditions. Summer (left) and autumn (right) conditions are found in the bottom rowBack to article page