A review of results of the international ionospheric Doppler sounder network

摘要: Abstract This paper summarizes main recent results reached by the Czech-lead international network of ionospheric Doppler shift sounders. The consists sounders in western half Czechia (5 measuring paths, 3 frequencies with central receivers Prague), northern Taiwan (3 transmitters, two separated receivers, 1 frequency), and similar systems paths receiver frequency) Tucuman (north-western Argentina) Hermanus (the southernmost South Africa). Main areas research have been: (1) propagation gravity waves; (2) effects earthquakes; (3) low latitude/equatorial phenomena; (4) response to strong meteorological (5) solar flares, geomagnetic activity micropulsations. results: Theoretically expected dominance wave against wind has been confirmed. Impact a train seismic waves (P, S, SS, Rayleigh) generated Tohoku 2011 M9.0 earthquake was registered ionosphere over Czech Republic as long-period infrasound at distance about 9000 km from epicenter. Analysis excited Nepal 2015 M7.8 observed showed that intensity signal is significantly height latitude dependent. Air/plasma compression be considered compute air particle velocities shift. Nonlinear result formation N-shaped pulse disturbance upper atmosphere/ionosphere above earthquakes documented example M8.3 Illapel 2016 earthquake. Spread F structures (both under crest equatorial ionization anomaly) provide consistent S4 scintillation data previous optical, GPS satellite measurements. (6) Short period rarely are large convective systems.