Sarris Theodoros

RANK:Associate Professor
SECTOR:Telecommunications and Space Science Sector
LABORATORY:Electromagnetic Theory Laboratory
EXPERTISE:Space Phenomena: Measurements, Modelling, Simulations




University Campus Kimmeria, Building B, Office 2.13
TELEPHONE:+30 25410 79531 Fax: +30 25410 79590



  • Study of the dynamics of supra-thermal plasma particles in the magnetosphere through computer simulations
  • Simulations of particle diffusion processes through models of electromagnetic field perturbations
  • Data analysis, time-series spectral/wavelet analysis, statistical analysis of space and ground-based measurements
  • Study of the electrodynamics of the upper atmosphere, study of the contribution of Joule heating in the thermal balance of the upper atmosphere, and modeling of electrodynamics parameters
  • Development of scientific instrumentation for the measurement of charged particles in space: participation in the instrument teams for the development of experiments such as PEEL/Hot-Pay, MEP/SPEKTR-R, PEP/JUICE



  • Electromagnetic Fields I
  • Electromagnetic Fields II
  • Physics 
  • Plasma Physics 
  • Remote Sensing
  • Numerical Methods in Electromagnetics



  • Space Applications
  • Space Electrodynamics
  • Technology of Space Systems



Theodoros E. Sarris received his Diploma in Physics from the University of Athens in 1997 and his PhD, titled “Simulation of the Energization of Superthermal Plasma in Dynamic E/M Fields”, in 2003. He has worked as Research Associate at the University of Colorado’s Laboratory for Atmospheric and Space Physics from 2003 until 2009. He joined the Democritus University of Thrace in 2009 as Assistant Professor at the Department of Electrical & Computer Engineering, where he is currently Associate Professor. Research interests and activities include: Simulations and measurements of energetic particle dynamics and electromagnetic fields in the inner magnetosphere and their interaction with the atmosphere; studies of diffusion processes and estimations of radial transport and diffusion rates of energetic particles; wave-particle interactions; instrument development activities, which include the participation in the instrument teams of the energetic particle detector PEEL (Precipitating Energetic Electron detector), launched in 2008 onboard the Norwegian Sounding Rocket Hot-Pay from the Andoya Rocket Range, the energetic particle detector MEP (plasma-Magnetic Experiment PLASMA-F), launched in July 2011 onboard the interplanetary space mission SPEKTR-R, and the charged and neutral particle detector PEP (Particle Environment Package), planned for launch in 2022 onboard the spacecraft mission JUICE (Jupiter ICy moons Explorer): with an estimated arrival at Jupiter in 2030, JUICE will spend at least three years making detailed observations of the giant gaseous planet Jupiter and three of its largest moons, Ganymede, Callisto and Europa. Recent research projects include the following ESA studies: “Feasibility Study for a Low Flying Spacecraft for the Exploration of the Mesosphere and Lower Thermosphere”, “Study and monitoring of Earth Mesosphere by Space Lidar Techniques”, “New Instruments and Sum Frequency Generation technique for a Lidar Mission”, “Synergies for coordinated Campaigns for the Study of the MLT region”, the DUTHSat nano-satellite, part of the QB50 constellation of CubeSats that targeted to investigate the Earth’s Thermosphere and Ionosphere and its response to solar activity, and the “Daedalus” mission, a candidate for ESA’s 10th Earth Explorer, selected to undergo a Phase-0 Mission Analysis and Needs Identification study.



  • «Daedalus Phase-0 Science and Requirements Consolidation Study». Principal Investigator. ESA, Earth Observation – Earth Explorer Programme EE-10. Duration: 2019-2020.
  • Participation of the Democritus University of Thrace in the project HELLAS-CH, of the action “Synergeia ELI – LASERLAB Europe, HiPER &”, Ministry of Economics and Development, Infrastructure Support for Research and Innovation. Co-Investigator, Principal Investigator for DUTH. Duration: 2017-2020.
  • «Nano-Satellite QB50 with an innovative Low-Power, Rad-Hard Data Acquisition System”, ARISTEIA 2011, GSRT, Funding Programme: ESPA 2007-2013. Principal Investigator. Duration: 2012-2015.
  • “Electrodynamics Study of Upper Atmosphere in Support to Future MLTI Missions”. ESA, General Studies. Principal Investigator. Duration: 2011-2012.
  • «Qualified ASICs for Nano-Satellite Sensors». ESA, EXPRO. Co-Investigator, Principal Investigator for DUTH. Duration: 2016-2017.



  • Sarris, T. E., Understanding the ionosphere thermosphere response to solar and magnetospheric drivers: status, challenges and open issues, 377, Review articles, Philosophical Transactions of the Royal Society, A: Mathematical, Physical and Engineering Sciences,, 2019.
  • Sarris, T. E., Talaat, E. R., Palmroth, M., Dandouras, I., Armandillo, E., Kervalishvili, G., Buchert, S., Malaspina, D., Jaynes, A., Paschalidis, N., Sample, J., Halekas, J., Tourgaidis, S., Lappas, V., Clilverd, M., Wu, Q., Sandberg, I., Aikio, A., and Pirnaris, P.: Daedalus: A Low-Flying Spacecraft for the Exploration of the Lower Thermosphere – Ionosphere, Geoscientific Instrumentation Methods and Data Systems,, 2019.
  • Sarris, T. E., X. Li, M. Temerin, H. Zhao, S. Califf, W. Liu, and R. Ergun, On the relationship between electron flux oscillations and ULF wave-driven radial transport, J. Geophys. Res. Space Physics, 122, doi:10.1002/2016JA023741, 2017.
  • Sarris, T. E. and Li, X.: Calculating ultra-low-frequency wave power of the compressional magnetic field vs. L and time: multi-spacecraft analysis using the Van Allen probes, THEMIS and GOES, Ann. Geophys., 34, 565-571, doi:10.5194/angeo-34-565-2016, 2016.
  • Scott R. Elkington and Theodore E. Sarris, The role of Pc5 waves in radiation belt dynamics: Current understanding and open questions, Book Chapter in: Waves, Particles and Storms in Geospace: A Complex Interplay, Oxford University Press, ISBN-10: 0198705247, ISBN-13: 978-0198705246, 1 Oct. 2016.