Effect of auroral substorms on the ionospheric range spread-F enhancements at high southern midlatitudes using real time vertical-sounding ionograms von Hajkowicz, Lech A.

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Monitoring ionospheric response to auroral electrojet activity from sub-auroral to equatorial latitudes in the East Asian-Australian longitudinal sector over a solar cycle (1978–19... von Hajkowicz, Lech A.

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In search of the ultimate ionosonde deduced equator von Hajkowicz, Lech A.

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Determination of the hemispheric character (i.e. southern or northern latitudinal position) of equatorial ionosonde stations as deduced from long-term recordings of the minimum hei... von Hajkowicz, Lech A

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Simultaneous observations of ionospheric quasiperiodic scintillations from short and long meridional baselines using VHF transmissions from Transit satellites von Hajkowicz, Lech A., Minakoshi, Hisamitsu

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