Publikationen von H. Kopka

Nielsen, E.; Axford, W. I.; Hagfors, T.; Kopka, H.; Armand, N. A.; Andrianov, V. A.; Shtern, D. J.; Breus, T.: The ``Long Wavelength Radar'' on the Mars-94 Orbiter. Advances in Space Research 15, S. (4)163 - (4)178 (1995)

Honary, F.; Stocker, A. J.; Robinson, T. R.; Jones, T. B.; Wade, N. M.; Stubbe, P.; Kopka, H.: EISCAT observations of electron temperature oscillations due to the action of high power HF radio waves. Journal of Atmospheric and Terrestrial Physics 55, S. 1433 - 1448 (1993)

Kohl, H.; Kopka, H.; Stubbe, P.; Rietveld, M. T.: Introduction to ionospheric heating experiments at Tromsø - II. Scientific problems. Journal of Atmospheric and Terrestrial Physics 55, S. 601 - 613 (1993)

Rietveld, M. T.; Kohl, H.; Kopka, H.; Stubbe, P.: Introduction to ionospheric heating at Tromsø - I. Experimental overview. Journal of Atmospheric and Terrestrial Physics 55, S. 577 - 599 (1993)

Lobachevsky, L. A.; Gruzdev, Y. V.; Kim, V. Y.; Mikhailova, G. A.; Panchenko, V. A.; Polimatidi, V. P.; Puchkov, V. A.; Vaskov, V. V.; Stubbe, P.; Kopka, H.: Observations of ionospheric modification by the Tromsø heating facility with the mobile diagnostic equipment of IZMIRAN. Journal of Atmospheric and Terrestrial Physics 54, S. 75 - 85 (1992)

Stocker, A. J.; Honary, F.; Robinson, T. R.; Jones, T. B.; Stubbe, P.; Kopka, H.: EISCAT observations of large scale electron temperature and electron density perturbations caused by high power HF radio waves. Journal of Atmospheric and Terrestrial Physics 54, S. 1555 - 1572 (1992)

Barr, R.; Stubbe, P.; Kopka, H.: Long-range detection of VLF radiation produced by heating the auroral electrojet. Radio Science 26, S. 871 - 879 (1991)

Dowden, R. L.; Adams, C. D. D.; Rietveld, M. T.; Stubbe, P.; Kopka, H.: Phase and amplitude perturbations on subionospheric signals produced by a moving patch of artificially heated ionosphere. Journal Geophysical Research 96, S. 239 - 248 (1991)

Leyser, T. B.; Thidé, B.; Derblom, H.; Hedberg, Å.; Lundborg, B.; Stubbe, P.; Kopka, H.: Dependence of stimulated electromagnetic emission on the ionosphere and pump wave. Journal Geophysical Research 95, S. 17233 - 17244 (1990)

Maul, A.-A.; Rietveld, M. T.; Stubbe, P.; Kopka, H.: Anregung periodischer Magnetfeldschwankungen durch Einstrahlung von amplitudenmodulierten Hochfrequenzwellen in die polare Ionosphäre. Kleinheubacher Berichte 33, S. 141 - 149 (1990)

Maul, A.-A.; Rietveld, M. T.; Stubbe, P.; Kopka, H.: Excitation of periodic magnetic field oscillations in the ULF range by amplitude modulated HF waves. Annales Geophysicae 8, S. 765 - 780 (1990)

Stubbe, P.; Kopka, H.: Stimulated electromagnetic emission in a magnetized plasma: A new symmetric spectral feature. Physical Review Letters 65, S. 183 - 186 (1990)

Derblom, H.; Thidé, B.; Leyser, T. B.; Nordling, J. A.; Hedberg, Å.; Stubbe, P.; Kopka, H.; Rietveld, M. T.: Tromsø heating experiments: Stimulated emission at HF pump harmonic and subharmonic frequencies. Journal Geophysical Research 94, S. 10111 - 10120 (1989)

Leyser, T. B.; Thidé, B.; Derblom, H.; Hedberg, Å.; Lundborg, B.; Stubbe, P.; Kopka, H.: Stimulated Electromagnetic Emission near Electron Cyclotron Harmonics in the Ionosphere. Physical Review Letters 63, S. 1145 - 1147 (1989)

Rietveld, M. T.; Stubbe, P.; Kopka, H.: On the frequency dependence of ELF/VLF waves produced by modulated ionospheric heating. Radio Science 24, S. 270 - 278 (1989)

Barr, R.; Rietveld, M. T.; Stubbe, P.; Kopka, H.: Ionospheric heater beam scanning: A realistic model of this mobile source of ELF/VLF radiation. Radio Science 23, S. 379 - 388 (1988)

Nordling, J. A.; Hedberg, Å.; Wannberg, G.; Leyser, T. B.; Derblom, H.; Opgenoorth, H. J.; Kopka, H.; Kohl, H.; Stubbe, P.; Rietveld, M. T. et al.; La Hoz, C.: Simultaneous bi-static European Incoherent Scatter UHF, 145 - MHz radar and stimulated electromagnetic emission observations during HF ionospheric modification. Radio Science 23, S. 809 - 819 (1988)

Rietveld, M. T.; Kopka, H.; Stubbe, P.: Pc1 ionospheric electric field oscillations. Annales Geophysicae 6, S. 381 - 388 (1988)

Wright, J. W.; Kopka, H.; Stubbe, P.: A large-scale ionospheric depletion by intense radio wave heating. Geophysical Research Letters 15, S. 1531 - 1533 (1988)

Barr, R.; Rietveld, M. T.; Stubbe, P.; Kopka, H.: Ionospheric heater beam scanning: A mobile source of ELF radiation. Radio Science 22, S. 1073 - 1083 (1987)