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. In March 2014 an all-sky imager (ASI) was installed at the Jicamarca RadioObservatory (11.95 ∘  S, 76.87 ∘  W; 0.3 ∘  S MLAT). Wepresent results of equatorial spread F (ESF) characteristics observed atJicamarca and at low latitudes. Optical 6300 and 7774 A airglowobservations from the Jicamarca ASI are compared with other collocatedinstruments and with ASIs at El Leoncito, Argentina (31.8 ∘  S,69.3 ∘  W; 19.8 ∘  S MLAT), and Villa de Leyva, Colombia(5.6 ∘  N, 73.52 ∘  W; 16.4 ∘  N MLAT). We use Jicamarcaradar data, in incoherent and coherent modes, to obtain plasma parameters anddetect echoes from irregularities. We find that ESF depletions tend to appearin groups with a group-to-group separation around 400–500 km andwithin-group separation around 50–100 km. We combine data from the threeASIs to investigate the conditions at Jicamarca that could lead to thedevelopment of high-altitude, or topside, plumes. We compare zonal winds,obtained from a Fabry–Perot interferometer, with plasma drifts inferredfrom the zonal motion of plasma depletions. In addition to the ESF studies wealso investigate the midnight temperature maximum and its effects at higherlatitudes, visible as a brightness wave at El Leoncito. The ASI at Jicamarcaalong with collocated and low-latitude instruments provide a cleartwo-dimensional view of spatial and temporal evolution of ionosphericphenomena at equatorial and low latitudes that helps to explain the dynamicsand evolution of equatorial ionospheric/thermospheric processes. Keywords. Ionosphere (equatorial ionosphere; ionospheric irregularities; plasma temperature and density)

Simultaneous 6300 Å airglow and radar observations of ionospheric irregularities and dynamics at the geomagnetic equator