Fig. 3From: On new two-dimensional UHF radar observations of equatorial spread F at the Jicamarca Radio ObservatoryRange–time–intensity (RTI) maps for the measurements made in all directions of the 10-beam F-region mode (see Table 1). Black line parallelograms labeled S1–S5 indicate five distinct echoing structures or events identified in the RTI maps and that are discussed one by one in this reportBack to article page