The PhD defence and trial lecture will be streamed. The chair of the defence will moderate the disputation.
Ex auditorio questions: the chair of the defence will invite the audience physically present in the auditorium to ask ex auditorio questions.
→ Live streaming of trial lecture and disputation
→ Request for thesis copy (available until the disputation starts)
Trial lecture
Time and place: October 10, 2023; 10:15 AM, Lille Fysiske Auditorium (V232) - Fysikkbygningen
Title: "Latest Research and Future Challenges in Space Weather Forecasting"
Main research findings
Radio-waves propagating through the ionised part of the atmosphere, the ionosphere, can get impacted by plasma structures and irregularities. The effects on the signal can be observed by ground based receivers, and are indications of plasma structures the disturbed signal encountered. In this thesis, the aim is to understand how energetic particles precipitating into the ionosphere from space are related to plasma structuring and radio wave propagation disturbances. The signature of particle precipitation are auroral emissions. Auroral emissions are observed by all-sky cameras, with filters for different wavelengths. Studying how the aurora moves in space and time and in relation to it, how signal disturbances evolve in space and time, allows to gain understanding of plasma structuring and instabilities in the ionosphere. To classify plasma instabilities in detail, measurements of plasma parameters, such as electron density and temperature, are required. Commonly used instruments to measure them are Langmuir probes. In this thesis, a method was developed using machine learning, to infer electron temperature measurements at the sampling resolution of the instrument. The topics addressed in this thesis are important for future space weather services, and in particular reliability of the satellite based positioning services.
Adjudication Committee
- Associate Professor Sean Elvidge, School of Engineering, University of Birmingham, United Kingdom
- Associate Professor Hilde Nesse, Department of Physics and Technology Birkeland Centre for Space Science, University of Bergen, Norway
- Professor Luiza Angheluta-Bauer, Department of Physics, University of Oslo, Norway
Supervisors
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Professor Wojciech J. M. Miloch, Department of Physics, University of Oslo, Norway
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Professor Lasse B. N. Clausen, Department of Physics, University of Oslo, Norway
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Dr. Yaqi Jin, Department of Physics, University of Oslo, Norway
Chair of defence
- Head of department Susanne F. Viefers, Department of Physics, University of Oslo, Norway
Candidate contact information
E-mail: florine.enengl@fys.uio.no
LinkedIn: Florine Enengl
Contact information to Department: Line Trosterud Resvold