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, pp. 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, pp. 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, pp. 577 - 599 (1993)
Stocker, A. J.; Honary, F.; Robinson, T. R.; Jones, T. B.; Stubbe, P.: Anomalous absorption during artificial modification at harmonics of the electron gyrofrequency. Journal Geophysical Research 98, pp. 13627 - 13634 (1993)
Barr, R.; Stubbe, P.: VLF heating of the lower ionosphere: Variation with magnetic latitude and electron density profile. Geophysical Research Letters 19, pp. 1747 - 1750 (1992)
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, pp. 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, pp. 1555 - 1572 (1992)
Stubbe, P.: Comment on ``Stimulated emissions from magnetized and inhomogeneous plasma'' by S. Goodman. Journal Geophysical Research 97, pp. 15057 - 15058 (1992)
Stubbe, P.; Kohl, H.; Rietveld, M. T.: Reply (to 'Comment on ``Langmuir Turbulence and Ionospheric Modification'' by P. Stubbe, H. Kohl and M. T. Rietveld' by D. F. DuBois, A. Hanssen and H. A. Rose). Journal Geophysical Research 97, pp. 15067 - 15071 (1992)
Barr, R.; Stubbe, P.; Kopka, H.: Long-range detection of VLF radiation produced by heating the auroral electrojet. Radio Science 26, pp. 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, pp. 239 - 248 (1991)
Isham, B.; Kofman, W.; Hagfors, T.; Nordling, J.; Thidé, B.; La Hoz, C.; Stubbe, P.: New phenomena observed by EISCAT during an RF ionospheric modification experiment. Radio Science 25, pp. 251 - 262 (1990)
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, pp. 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, pp. 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, pp. 765 - 780 (1990)
The European Space Agency (ESA) has given the green light to build the flight models of the spacecraft and science payload for the PLATO mission to search for extrasolar planets.
In the "Solar and Stellar Interiors" department, Laurent Gizon, Jesper Schou, Aaron Birch, Robert Cameron and others offer PhD projects in solar physics and astrophysics. Helioseismology and asteroseismology are used as important tools to study the oscillating Sun and stars.
The longest-serving solar observatory in space has turned 25 and is still making significant contributions to solar research. Its old age has become an important merit.