Seasonal and Local Time Variations of E-Region Field-Aligned Irregularities Observed with 30.8-MHz Radar at Kototabang, Indonesia

Figure 4

Local time and altitude variations of averaged Doppler velocity of the E-region FAIs in the southward/downward perpendicular direction to the magnetic fields (a) June solstice, (b) December solstice, and (c) equinox seasons in 2007.