Fig. 2From: Sporadic E layer characteristics at equatorial latitudes as observed by GNSS radio occultation measurementsa Ionogram of a strong sporadic E layer seen as an Esb at São Luís in the afternoon of 21 February 2021. Plot b shows a co-located (2.0\(^\circ\)S, 43.5\(^\circ\)W) normalized SNR profile including an intense Es signature. The RO sounding was recorded by COSMIC-2 satellite E2 at 17:05 UTBack to article page