Fig. 3From: Equatorial plasma bubble seeding by MSTIDs in the ionosphereTemporal variations in the fixed frequency (5–8 MHz) true heights, hF (upper), and deviation of hF (band-pass filtered (30 min–3 h) (lower) observed at São Luis in the afternoon to evening period on July 05, 2014. The vertical dotted line indicates the solar terminator at an altitude of 300 kmBack to article page