Research Article

Effects of Abrupt Variations of Solar Wind Dynamic Pressure on the High-Latitude Ionosphere

Table 2

An overview of the echoes statistics for the different subsets of the events used for the PCP analysis. Is and Ds stand for Increases and Decreases of solar wind dynamic pressure, NH and SH stand for Northern and Southern Hemisphere.

Set of PCP events Number of events Number of echoes

Quiet Is NH 31 1077530
Quiet Is SH 21 238995
Quiet Ds NH 14 610360
Quiet Ds SH 13 362373
Disturbed Is NH 21 683244
Disturbed Is SH 21 421303
Disturbed Ds NH 13 608818
Disturbed Ds SH 15 339407