Stubbe, P.; Kopka, H.; Thidé, B.; Hedberg, Å.: Stimulated electromagnetic emission: A new technique to study the parametric decay instability in the ionosphere. Journal Geophysical Research 89, pp. 7523 - 7536 (1984)
Hagfors, T.; Kofman, W.; Kopka, H.; Stubbe, P.; Äijanen, T.: Observations of enhanced plasma lines by EISCAT during heating experiments. Radio Science 18, pp. 861 - 866 (1983)
Hedberg, Å.; Derblom, H.; Thidé, D.; Kopka, H.; Stubbe, P.: Observations of HF backscatter associated with the heating experiment at Tromsø. Radio Science 18, pp. 840 - 850 (1983)
Hibberd, F. H.; Nielsen, E.; Stubbe, P.; Kopka, H.: Production of auroral zone E-region irregularities by ionospheric heating. Journal Geophysical Research 88, p. 6347 (1983)
Jones, T. B.; Robinson, T.; Stubbe, P.; Kopka, H.: A hysteresis effect in the generation of fieldaligned irregularities by a high-power radio wave. Radio Science 18, pp. 835 - 839 (1983)
Rietveld, M. T.; Barr, R.; Dowden, R. L.; Kopka, H.; Nielsen, E.; Stubbe, P.: Ionospheric elctric field pulsation: A comparison between VLF results from an ionospheric heating experiment and STARE. Journal Geophysical Research 88, p. 2140 (1983)
Rietveld, M. T.; Kopka, H.; Nielsen, E.; Stubbe, P.; Dowden, R. L.: Ionospheric elctric field pulsation: A comparison between ULF results from an ionospheric heating experiment and STARE. Radio Science 88, p. 2140 (1983)
Jones, T. B.; Robinson, T.; Kopka, H.; Stubbe, P.: Phase changes induced in a diagnostic radio wave passing through a heated region of the auroral ionosphere. Journal Geophysical Research 87, pp. 1557 - 1564 (1982)
Stubbe, P.; Kopka, H.; Jones, T. B.; Robinson, T.: Wide band attention of radio waves caused by powerful HF waves: Saturation and dependence on ionospheric variability. Journal Geophysical Research 87, pp. 1551 - 1555 (1982)
Stubbe, P.; Kopka, H.; Rietveld, M. T.; Dowden, R. L.: ELF and VLF wave generation by modulated HF heating of the current carrying lower ionosphere. Journal of Atmospheric and Terrestrial Physics 44, pp. 1123 - 1135 (1982)
Thidé, B.; Kopka, H.; Stubbe, P.: Oberservations of stimulated scattering of a strong high-frequency radio wave in the ionosphere. Physical Review Letters 49, pp. 1561 - 1564 (1982)
Dowden, R. L.; Stubbe, P.; Kopka, H.: VLF wave generation by modulated RF heating of the electrojet ionosphere. Advances in Space Research 1, pp. 221 - 223 (1981)
Stubbe, P.: Modifiying effects of a strong electromagnetic wave upon a weakly ionized plasma: A kinetic description. Radio Science 16, pp. 417 - 425 (1981)
Stubbe, P.; Kopka, H.: Generation of Pc5 pulsations by polar electrojet modulation: First experimental evidence. Journal Geophysical Research 86, pp. 1606 - 1608 (1981)
Stubbe, P.; Kopka, H.; Dowden, R. L.: Generation of ELF and VLF waves by polar electrojet modulation: Experimental results. Journal Geophysical Research 86, pp. 9073 - 9078 (1981)
How does our star heat its outer atmosphere, the solar corona, to unimaginable temperatures of up to 10 million degrees Celsius? With unprecedented observational data from ESA's Solar Orbiter spacecraft and powerful computer simulations, ERC starting grant awardee Pradeep Chitta intends to bring new momentum to the search for the coronal heating mechanism.
The research group “Solar Lower Atmosphere and Magnetism” (SLAM) studies the conditions and dynamic processes in the atmospheric layer between the solar surface (photosphere) and the overlying chromosphere, an approximately 2000 km thick gas layer.
The main research fields of the department "Sun and Heliosphere" are covered by the research groups "Solar and Stellar Coronae", "Solar Lower Atmosphere and Magnetism", "Solar and Stellar Magnetohydrodynamics" and "Solar Variability and Climate".