Publications of H. Kopka
All genres
Journal Article (67)
21.
Journal Article
92, pp. 11149 - 11157 (1987)
Daytime scintillations induced by high-power HF waves at Tromsø, Norway. Journal Geophysical Research 22.
Journal Article
22, pp. 655 - 661 (1987)
Propagation of artificially excited Langmuir waves in the ionosphere. Radio Science 23.
Journal Article
92, p. 8707 (1987)
The characteristics of ionospheric heating-produced ELF/VLF waves over 32 hours. Journal Geophysical Research 24.
Journal Article
91, pp. 4451 - 4459 (1986)
ELF and VLF signals radiated by the ``Polar Electrojet Antenna'': Experimental results. Journal Geophysical Research 25.
Journal Article
91, pp. 4451 - 4459 (1986)
ELF and VLF signals radiated by the "Polar Electrojet Antenna": experimental results. Journal Geophysical Research 26.
Journal Article
4, p. 49 (1986)
Comparison between the ionospheric plasma drift and the motion of artificially induced irregularities as observed by HF backscatter radars. Annales Geophysicae 27.
Journal Article
21, pp. 117 - 125 (1986)
Measurements of HF backscatter cross section for striations created by ionospheric heating at different power levels. Radio Science 28.
Journal Article
91, p. 11309 (1986)
Heater-induced 1-meter irregularities. Journal Geophysical Research 29.
Journal Article
48, pp. 1027 - 1035 (1986)
EISCAT observations of the heated ionosphere. Journal of Atmospheric and Terrestrial Physics 30.
Journal Article
48, pp. 311 - 326 (1986)
D-region characteristics deduced from pulsed ionospheric heating under auroral electrojet conditions. Journal of Atmospheric and Terrestrial Physics 31.
Journal Article
317, p. 6033 (1985)
Extra-low frequency radiation from the polar electrojet antenna. Nature 32.
Journal Article
317, pp. 155 - 157 (1985)
ELF radiation from the polar electrojet antenna. Nature 33.
Journal Article
90, pp. 2861 - 2875 (1985)
The diffraction of VLF radio waves by a patch of ionosphere illuminated by a powerful HF transmitter. Journal Geophysical Research 34.
Journal Article
90, p. 12293 (1985)
Observations of E-region irregularities generated at auroral latitudes by a higher-power radio wave. Journal Geophysical Research 35.
Journal Article
47, pp. 537 - 545 (1985)
HF modification of the auroral D-region detected by a partial reflection experiment. Journal of Atmospheric and Terrestrial Physics 36.
Journal Article
47, pp. 537 - 545 (1985)
HF modification of the auroral d-region detected by a partial reflection experiment. Journal of Atmospheric and Terrestrial Physics 37.
Journal Article
47, p. 1151 (1985)
Ionospheric modification experiment with the Tromsø heating facility. Journal of Atmospheric and Terrestrial Physics 38.
Journal Article
12, pp. 1151 - 1163 (1985)
Ionospheric modification experiments with the tromsØ heating facility. Journal of Atmospheric and Terrestrial Physics 39.
Journal Article
309, pp. 534 - 536 (1984)
Effect of a heated patch of auroral ionosphere on VLF-radio wave propagation. Nature 40.
Journal Article
11, pp. 523 - 526 (1984)
First experimental evidence of HF produced electron density irregularities in the polar ionosphere, diagnosed by UHF radio star scintillations. Geophysical Research Letters