James, H. G.; Dowden, R. L.; Rietveld, M. T.; Stubbe, P.; Kopka, H.: Simultaneous observations of ELF waves from an artificially modulated electrojet in space and on the ground. Journal Geophysical Research 89, pp. 1655 - 1666 (1984)
Jones, T. B.; Robinson, T.; Stubbe, P.; Kopka, H.: Frequency dependence of anomalous absorbation caused by high power radio waves. Journal of Atmospheric and Terrestrial Physics 46, pp. 147 - 153 (1984)
Rietveld, M. T.; Barr, R.; Kopka, H.; Nielsen, E.; Stubbe, P.; Dowden, R. L.: Ionospheric heater beam scanning: A new technique for ELF studies of the auroral ionosphere. Radio Science 19, p. 1069 (1984)
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)
Czechowsky, P.; Schmidt, G.; Kopka, H.: Medium Frequency Radar Observations in the Middle Atmosphere. Journal of Atmospheric and Terrestrial Physics 45, pp. 729 - 732 (1983)
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)
Application deadline 1 October 2024. PhD projects in planetary science, solar and stellar physics, solar magnetism, heliophysics, helioseismology, asteroseismology, ...
First Light for Sunrise III: the first tests with real sunlight were successful. The balloon-borne solar observatory should be ready for launch at the end of May.
In analyzing solar observations from the 19th century, scientists are turning to amateur researchers for help. The project will allow to better understand the history of our star.
Astronomical teamwork: By combining data from Solar Orbiter and SDO, a group of researchers has unambiguously determined the magnetic field at the solar surface.
Application deadline 1 October 2023. PhD projects in planetary science, solar and stellar physics, solar magnetism, heliophysics, helioseismology, asteroseismology, ...
Philipp Löschl has co-authored an excellent publication on Solar Orbiter data which has been awarded best Solar Physics paper of 2022 (Gherardo Valori et al. 2022)