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Earth Science

D-Index
33
Citations
4222
World Ranking
8347
National Ranking
608

Overview

H. Kopka is affiliated with the Max Planck Society in Germany. Their research profile reflects engagement with the scientific community through institutional association with this prominent research organization.

Despite the absence of published papers or citations in the available data, Kopka's presence at the Max Planck Society suggests involvement in research activities aligned with the institution's scientific endeavors.

No records of frequent co-authors or publication venues are documented, which may indicate either early career stage, focus on collaborative or internal research, or data limitations.

Similarly, there are no listed books or book publishers associated with Kopka's work currently available.

Their research topics, main fields of study, and subfields remain unspecified in the provided data, leaving the precise areas of scientific focus unknown from the current profile.

Information regarding awards has not been recorded, which may reflect either a non-awarded status or incomplete data.

Best Publications

  • Observations of Stimulated Scattering of a Strong High-Frequency Radio Wave in the Ionosphere

    Bo Thidé;Helmut Kopka;Peter Stubbe

  • Introduction to ionospheric heating at Tromsø—I. Experimental overview

    M. T. Rietveld;H. Kohl;H. Kopka;P. Stubbe

  • Stimulated electromagnetic emission: A new technique to study the parametric decay instability in the ionosphere

    P. Stubbe;H. Kopka;B. Thidé;H. Derblom

  • Ionospheric modification experiments in northern Scandinavia

    P. Stubbe;H. Kopka;H. Lauche;M. T. Rietveld

  • Generation of ELF and VLF waves by polar electrojet modulation: Experimental results

    P. Stubbe;H. Kopka;R. L. Dowden

  • Modulation of the polar electrojet by powerful HF waves

    P. Stubbe;H. Kopka

  • ELF and VLF wave generation by modulated HF heating of the current carrying lower ionosphere

    P. Stubbe;H. Kopka;M. T. Rietveld;R. L. Dowden

  • Stimulated electromagnetic emission near electron cyclotron harmonics in the ionosphere

    T. B. Leyser;B. Thidé;H. Derblom;Å. Hedberg

  • Dependence of Stimulated Electromagnetic Emission on the Ionosphere and Pump Wave

    T. B. Leyser;B. Thidé;H. Derblom;Å. Hedberg

  • Observations of HF backscatter associated with the heating experiment at Tromsø

    Å. Hedberg;H. Derblom;B. Thidé;H. Kopka

  • IONOSPHERIC MODIFICATION EXPERIMENTS WITH THE TROMSO HEATING FACILITY

    P. Stubbe;H. Kopka;M. T. Rietveld;A. Frey

  • D-region characteristics deduced from pulsed ionospheric heating under auroral electrojet conditions

    M. T. Rietveld;H. Kopka;P. Stubbe

  • Observations of stimulated electromagnetic emissions in ionospheric heating experiments

    B. Thidé;H. Derblom;Å. Hedberg;H. Kopka

  • Observations of enhanced plasma lines by EISCAT during heating experiments

    T. Hagfors;W. Kofman;H. Kopka;P. Stubbe

  • Stimulated electromagnetic emission in a magnetized plasma: A new symmetric spectral feature.

    P. Stubbe;H. Kopka

  • EISCAT observations of large scale electron temperature and electron density perturbations caused by high power HF radio waves

    A. J. Stocker;F. Honary;T. R. Robinson;T. B. Jones

  • On the frequency dependence of ELF/VLF waves produced by modulated ionospheric heating

    M. T. Rietveld;P. Stubbe;H. Kopka

  • EISCAT observations of the heated ionosphere

    T. B. Jones;T. R. Robinson;P. Stubbe;H. Kopka

  • The characteristics of ionospheric heating-produced ELF/VLF waves over 32 hours

    M. T. Rietveld;H. P. Mauelshagen;P. Stubbe;H. Kopka

  • Wide band attenuation of radio waves caused by powerful HF waves: saturation and dependence on ionospheric variability

    P. Stubbe;H. Kopka;T. B. Jones;T. Robinson

Frequent Co-Authors

Peter Stubbe
Peter Stubbe Max Planck Society
M. T. Rietveld
M. T. Rietveld University of Tromsø - The Arctic University of Norway
Erling Nielsen
Erling Nielsen Max Planck Society
Santimay Basu
Santimay Basu United States Air Force Research Laboratory
Wlodek Kofman
Wlodek Kofman Grenoble Alpes University
Marcel Crochet
Marcel Crochet Université Catholique de Louvain

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