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  • 1. Barabash, Victoria
    A comparison of PMSE occurrence with energetic particle precipitation detected by riometer in northern Scandinavia2000In: Proceedings of the 9th International Workshop on Technical and Scientific Aspects of MST Radar- MST9 combined with COST-76 Final Profiler Workshop: Toulouse, France, March 13-18, 2000 / [ed] Belva Edwards, Toulouse: SCOSTEP , 2000Conference paper (Other academic)
  • 2. Barabash, Victoria
    Are variations in PMSE intensity affected by energetic particle precipitation?2002In: Annales Geophysicae, ISSN 0992-7689, E-ISSN 1432-0576, Vol. 20, p. 539-545Article in journal (Refereed)
  • 3. Barabash, Victoria
    ESRAD MST radar analysis of the waves1998In: Proceedings of the 4th European Symposium on Stratospheric Ozone, Air Pollution Research Report 66, European Commision, 1998, p. 70-73Conference paper (Other academic)
  • 4. Barabash, Victoria
    Leewave observations by the MST radar ESRAD in northen Sweden1999In: Mesoscale processes in the stratosphere: their effect on the stratospheric chemistry and microphysics ; proceedings of the European workshop 8 to 11 November 1998 Bad Tölz, Bavaria, Germany / [ed] K.S. Carslaw ; G.T. Amanatidis, Luxemourg: European Commission Joint Research Centre, 1999, p. 233-238Conference paper (Other academic)
  • 5. Barabash, Victoria
    MST radar observations of PMSE in Northern Scandinavia during May-August 19971998In: Proceedings of the Eigth Workshop on Technical and Scientific Aspects of MST Radar : solar-terrestrial energy program: solar-terrestrial energy program ; Bangalore, India, December 15 - 20, 1997 / [ed] Belva Edwards, Boulder, Colo.: SCOSTEP , 1998, p. 326-329Conference paper (Other academic)
  • 6. Barabash, Victoria
    MST-radar lee wave ovservations during winter 1996/97 in northern Scandinavia1997In: Proceedings of 13th ESA Symposium on Rocket and Baloon Programmes and Related Research, ESA-SP-397, 1997, p. 179-183Conference paper (Other academic)
  • 7. Barabash, Victoria
    Wind profiling with ESRAD, the Esrange radar1997In: Extended abstracts COST-76 Profiler Workshop / [ed] Hans Richner, Zürich: Eidgenössische Technische Hochschule (ETH), Institute for Atmospheric Science , 1997, p. 70-73Conference paper (Other academic)
  • 8. Barabash, Victoria
    et al.
    Chilson, P.
    Kirkwood, S.
    Réchou, A.
    Stebel, K.
    Investigations of the possible relationship between PMSE and tides using a VHF MST radar1998In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 25, no 17, p. 3297-3300Article in journal (Refereed)
  • 9.
    Barabash, Victoria
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Ejemalm, Johnny
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Kuhn, Thomas
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Milz, Mathias
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Molin, Sven
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    Johansson, Jonny
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    Westerberg, Lars-Göran
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
    Masters Programs in Space Science and Engineering in Northern Sweden2017Conference paper (Refereed)
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  • 10. Barabash, Victoria
    et al.
    Kirkwood, S.
    Feofilov, A.
    Kutepov, A.
    Polar mesosphere summer echoes during the July 2000 solar proton event2004In: Annales Geophysicae, ISSN 0992-7689, E-ISSN 1432-0576, Vol. 22, no 3, p. 759-771Article in journal (Refereed)
    Abstract [en]

    The influence of the solar proton event (SPE) 14-16 July 2000 on Polar Mesosphere Summer Echoes (PMSE) is examined. PMSE were observed by the Esrange VHF MST Radar (ESRAD) at 67°53'N, 21°06'E. The 30MHz Imaging Riometer for Ionospheric Studies IRIS in Kilpisjärvi (69°30'N, 20°47'E) registered cosmic radio noise absorption caused by ionisation changes in response to the energetic particle precipitation. An energy deposition/ion-chemical model was used to estimate the density of free electrons and ions in the upper atmosphere. Particle collision frequencies were calculated from the MSISE-90 model. Electric fields were calculated using conductivities from the model and measured magnetic disturbances. The electric field reached a maximum of 91mV/m during the most intensive period of the geomagnetic storm accompanying the SPE. The temperature increase due to Joule and particle heating was calculated, taking into account radiative cooling. The temperature increase at PMSE heights was found to be very small. The observed PMSE were rather intensive and extended over the 80-90km height interval. PMSE almost disappeared above 86km at the time of greatest Joule heating on 15 July 2000. Neither ionisation changes, nor Joule/particle heating can explain the PMSE reduction. Transport effects due to the strong electric field are a more likely explanation.

  • 11.
    Barabash, Victoria
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Kuhn, Thomas
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Milz, Mathias
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Ejemalm, Johnny
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Enmark, Anita
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    de Oliviera, Élcio Jeronimo
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Persson, Olle
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Sadeghi, Soheil
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    The influence of international student projects on learning and study environment among the national and international space students2020In: NU2020 — Hållbart lärande: Abstractbok, Sveriges universitets- och högskoleförbund (SUHF) , 2020, p. 74-75Conference paper (Refereed)
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  • 12.
    Barabash, Victoria
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Milz, Mathias
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Kuhn, Thomas
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Laufer, Rene
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Development of a competence ecosystem for the future space workforce: strategies, practices and recommendations from international master programs in northern Sweden2022In: Acta Astronautica, ISSN 0094-5765, E-ISSN 1879-2030, Vol. 197, p. 46-52Article in journal (Refereed)
    Abstract [en]

    Requirements from the global labor market have substantially changed in recent years. Graduate and post-graduate students with excellent subject knowledge, deep understanding of modern working methods, technicaland higher-order thinking, engineering intuition and problem-solving skills are in great demand. They should also have professional skills such as well-developed abilities in communication and teamwork, usually in an international work environment. This review discusses the advantages of multidisciplinary study environment, educational strategies such as student-oriented teaching, project-based learning with its applicability to a“real-world” setting, active learning techniques, development of entrepreneurial skills, lessons learned and best practices from the international Master Program in Spacecraft Design and the Joint Master Program in SpaceScience and Technology – SpaceMaster at Luleå University of Technology in northern Sweden. The importance of complementarity between formal, informal and non-formal learning methods for science and engineering studentshas been specifically highlighted. Connections to the world of work, through active industry involvementin the education in a systematic way, e.g. External Advisory Board, shared services and facilities, joint projectsand supervision of Master and PhD students, is recognised as a key success factor for professional training. A structural combination of modern pedagogical tools, strategic partnership with industry, business entities, academic partners and up-to-date multidisciplinary labs creates the conceptual framework for a CompetenceEcosystem for fostering a new generation of space scientists and engineers.

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  • 13.
    Barabash, Victoria
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Milz, Mathias
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Kuhn, Thomas
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Laufer, René
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Development of a Competence Ecosystem for the Future Space Workforce: Strategies, Practices and Recommendations from International Masterprograms in Northern Sweden2021In: IAC 2021 Congress Proceedings, 72nd International Astronautical Congress (IAC), Dubai, United Arab Emirates, International Astronautical Federation (IAF) , 2021, article id 65175Conference paper (Refereed)
    Abstract [en]

    Requirements from the global labor market have substantially changed in recent years. Graduate and postgraduate students with excellent subject knowledge, deep understanding of modern working methods, technical and higher-order thinking, engineering intuition and problem-solving skills are in great demand. They should also have professional skills such as well-developed abilities in communication and teamwork, usually in an international work environment. This review discusses the advantages of multidisciplinary study environment, educational strategies such as student-oriented teaching, project-based learning with its applicability to a "real-world" setting, active learning techniques, development of entrepreneurial skills, lessons learned and best practices from the international Master Program in Spacecraft Design and the Joint Master Program in Space Science and Technology – SpaceMaster at Luleå University of Technology in northern Sweden. The importance of complementarity between formal, informal and non-formal learning methods for science and engineering students has been specifically highlighted. Connections to the world of work, through active industry involvement in the education in a systematic way, e.g. External Advisory Board, shared services and facilities, joint projects and supervision of Master and PhD students, is recognised as a key success factor for professional training. A structural combination of modern pedagogical tools, strategic partnership with industry, business entities, academic partners and up-to-date multidisciplinary labs creates the conceptual framework for a Competence Ecosystem for fostering a new generation of space scientists and engineers.

  • 14.
    Barabash, Victoria
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Osepian, A.
    Polar Geophysical Institute, Halturina 15, 183 023 Murmansk, Russia.
    Dalin, P.
    Swedish Institute of Space Physics, Rymdcampus 1, 981 92 Kiruna, Sweden.
    Kirkwood, S.
    Swedish Institute of Space Physics, Rymdcampus 1, 981 92 Kiruna, Sweden.
    Electron density profiles in the quiet lower ionosphere based on the results of modeling and experimental data2012In: Annales Geophysicae, ISSN 0992-7689, E-ISSN 1432-0576, Vol. 30, no 9, p. 1345-1360Article in journal (Refereed)
    Abstract [en]

    The theoretical PGI (Polar Geophysical Institute) model for the quiet lower ionosphere has been applied for computing the ionization rate and electron density profiles in the summer and winter D-region at solar zenith angles less than 80° and larger than 99° under steady state conditions. In order to minimize possible errors in estimation of ionization rates provided by solar electromagnetic radiation and to obtain the most exact values of electron density, each wavelength range of the solar spectrum has been divided into several intervals and the relations between the solar radiation intensity at these wavelengths and the solar activity index F10.7 have been incorporated into the model. Influence of minor neutral species (NO, H2O, O, O3) concentrations on the electron number density at different altitudes of the sunlit quiet D-region has been examined. The results demonstrate that at altitudes above 70 km, the modeled electron density is most sensitive to variations of nitric oxide concentration. Changes of water vapor concentration in the whole altitude range of the mesosphere influence the electron density only in the narrow height interval 73–85 km. The effect of the change of atomic oxygen and ozone concentration is the least significant and takes place only below 70 km. 

    Model responses to changes of the solar zenith angle, solar activity (low–high) and season (summer–winter) have been considered. Modeled electron density profiles have been evaluated by comparison with experimental profiles available from the rocket measurements for the same conditions. It is demonstrated that the theoretical model for the quiet lower ionosphere is quite effective in describing variations in ionization rate, electron number density and effective recombination coefficient as functions of solar zenith angle, solar activity and season. The model may be used for solving inverse tasks, in particular, for estimations of nitric oxide concentration in the mesosphere.

  • 15.
    Barabash, Victoria
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Osepian, Aleftina
    Polar Geophysical Institute, Murmansk.
    Dalin, Peter
    Swedish Institute of Space Physics / Institutet för rymdfysik.
    Influence of water vapour on the height distribution of positive ions, effective recombination coefficient and ionisation balance in the quiet lower ionosphere2014In: Annales Geophysicae, ISSN 0992-7689, E-ISSN 1432-0576, Vol. 32, p. 207-222Article in journal (Refereed)
    Abstract [en]

    Mesospheric water vapour concentration effects on the ion composition and electron density in the lower ionosphere under quiet geophysical conditions were examined. Water vapour is an important compound in the mesosphere and the lower thermosphere that affects ion composition due to hydrogen radical production and consequently modifies the electron number density. Recent lower-ionosphere investigations have primarily concentrated on the geomagnetic disturbance periods. Meanwhile, studies on the electron density under quiet conditions are quite rare. The goal of this study is to contribute to a better understanding of the ionospheric parameter responses to water vapour variability in the quiet lower ionosphere. By applying a numerical D region ion chemistry model, we evaluated efficiencies for the channels forming hydrated cluster ions from the NO+ and O2+ primary ions (i.e. NO+.H2O and O2+.H2O, respectively), and the channel forming H+(H2O)nproton hydrates from water clusters at different altitudes using profiles with low and high water vapour concentrations. Profiles for positive ions, effective recombination coefficients and electrons were modelled for three particular cases using electron density measurements obtained during rocket campaigns. It was found that the water vapour concentration variations in the mesosphere affect the position of both the Cl2+ proton hydrate layer upper border, comprising the NO+(H2O)nand O2+(H2O)nhydrated cluster ions, and the Cl1+ hydrate cluster layer lower border, comprising the H+(H2O)npure proton hydrates, as well as the numerical cluster densities. The water variations caused large changes in the effective recombination coefficient and electron density between altitudes of 75 and 87 km. However, the effective recombination coefficient, αeff, and electron number density did not respond even to large water vapour concentration variations occurring at other altitudes in the mesosphere. We determined the water vapour concentration upper limit at altitudes between 75 and 87 km, beyond which the water vapour concentration ceases to influence the numerical densities of Cl2+ and Cl1+, the effective recombination coefficient and the electron number density in the summer ionosphere. This water vapour concentration limit corresponds to values found in the H2O-1 profile that was observed in the summer mesosphere by the Upper Atmosphere Research Satellite (UARS). The electron density modelled using the H2O-1 profile agreed well with the electron density measured in the summer ionosphere when the measured profiles did not have sharp gradients. For sharp gradients in electron and positive ion number densities, a water profile that can reproduce the characteristic behaviour of the ionospheric parameters should have an inhomogeneous height distribution of water vapour.

  • 16.
    Belova, Evgenia
    et al.
    Swedish Institute of Space Physics, Box 812, S-981 28 Kiruna, Sweden.
    Barabash, Victoria
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Godin, Oleg A.
    Naval Postgraduate School, Monterey, CA 93943, USA.
    Kero, Johan
    Swedish Institute of Space Physics, Box 812, S-981 28 Kiruna, Sweden.
    Näsholm, Sven Peter
    NORSAR, P.O. Box 53, N-2027 Kjeller, Norway; Department of Informatics, University of Oslo, P.O box 1080 Blindern, N-0316 Oslo, Norway.
    Vorobeva, Ekaterina
    NORSAR, P.O. Box 53, N-2027 Kjeller, Norway; Norwegian University of Science and Technology, Postbox 8900, NO-7491 Trondheim, Torgarden, Trondheim, Norway.
    Le Pichon, Alexis
    CEA, DAM, DIF, F-91297 Arpajon, France.
    High-speed echoes in the polar winter mesosphere: Infrasound as a probable cause2023In: Advances in Space Research, ISSN 0273-1177, E-ISSN 1879-1948, Vol. 72, no 8, p. 3181-3201Article in journal (Refereed)
    Abstract [en]

    We considered three events on 4 November 2015, 22 December 2016, and 12 November 2018, when the signals travelling in the polar winter mesosphere with high horizontal velocities above 300 m/s were measured by the atmospheric radar ESRAD (Chilson et al., 1999) located at Esrange, near Kiruna in northern Sweden. We proposed four mechanisms of generation of such special cases of polar mesosphere echoes, e.g. high-speed PMWE, that involve microbaroms, i.e. infrasound waves at 0.1 - 0.35 Hz frequencies created by ocean swell. These mechanisms are (i) generation of viscous waves, (ii) generation of thermal waves, (iii) direct contributions of infrasound, and (iv) generation of secondary waves at sound dissipation. These processes necessarily accompany sound propagation in inhomogeneous, thermally conducting and viscous fluid (air). The four models were theoretically analysed and their efficiency was estimated. The infrasound measurements at the IS37 station (Gibbons et al., 2019) located about 170 km north-west from the ESRAD radar, modelled maps of the microbarom sources, infrasound propagation conditions and ionospheric conditions for these three PMWE events support the proposed models. Infrasound-generated thermal waves are suggested to be the most probable specific cause of the observed high-speed, high-aspect-ratio PMWE events. However, absence of in-situ infrasound and plasma measurements did not allow us to quantify contributions of individual physical mechanisms to the fast-travelling echoes generation.

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  • 17.
    Belova, Evgenia
    et al.
    Swedish Institute of Space Physics, Kiruna, Sweden.
    Kero, Johan
    Swedish Institute of Space Physics, Kiruna, Sweden.
    Näsholm, Sven Peter
    Norwegian University of Science and Technology (NTNU), Faculty of Natural Sciences, Department of Physics, Norway.
    Vorobeva, Ekaterina
    Norwegian University of Science and Technology (NTNU), Faculty of Natural Sciences, Department of Physics, Norway. Naval Postgraduate School, Monterey, CA, USA.
    Godin, Oleg A.
    Naval Postgraduate School, Monterey, CA, USA.
    Barabash, Victoria
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Polar Mesosphere Winter Echoes and their relation to infrasound2020Conference paper (Refereed)
    Abstract [en]

    Polar Mesosphere Winter Echoes (PMWE) are radar echoes that originate from the mesosphere at 50-80 km altitude and are observed with VHF radars during equinox and winter seasons. Strong PMWE are relatively rare phenomena, in most cases they are observed when the lower ionosphere displays high ionisation. Interpretations of observational results concerning PMWE are controversial and the origin of the echoes is still under debate. Especially intriguing is that in some cases of strong PMWE, the measured horizontal speeds of the radar reflecting structures can exceed 300 m/s. Radar reflection (scattering) by infrasound waves at frequencies below about 2 Hz was suggested in order to explain these observations. We will give recent examples of PMWE events of high horizontal speed as observed with the 52 MHz MST radar (ESRAD) located at Esrange (68°N, 21ºE) in northern Sweden. Together with this we will analyse infrasound measurements made at ground-based stations near Kiruna (67.5°N, 20.13ºE) and at the infrasound station IS37 (69°N, 18ºE) in Norway during these events. We discuss prospective relations between PMWE and the microbaroms that are generated by ocean swell in the North Atlantic.

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  • 18.
    Castro, Marley
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
    Felicetti, L.
    School of Aerospace Transport and Manufacturing, Cranfield University, Cranfield, MK43 0AL, United Kingdom.
    Sadeghi, Soheil
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Satpute, Sumeet
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Barabash, Victoria
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    de Oliveira, Élcio Jeronimo
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Westerberg, Lars-Göran
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
    Laufer, René
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Multi-Cubesat Mission For Auroral Acceleration Region Studies2021In: IAC 2021 Congress Proceedings, 72nd International Astronautical Congress (IAC), Dubai, United Arab Emirates, International Astronautical Federation (IAF) , 2021, article id 66544Conference paper (Refereed)
    Abstract [en]

    The Auroral Acceleration Region (AAR) is a key region in understanding the Magnetosphere-Ionosphere interaction. To understand the physical, spatial and temporal features of the region, multi-point measurements are required. Distributed small-satellite missions such as constellations of multiple nano satellites (for example multi-unit CubeSats) would enable such type of measurements. The capabilities of such a mission will highly depend on the number of satellites - one reason that makes low-cost platforms like CubeSats a very promising choice. In a previous study, the state-of-the-art of miniaturized payloads for AAR measurements was analyzed and evaluated and capabilities of different multi-CubeSat configurations equipped with such payloads in addressing different open questions in AAR were discussed. In this paper the mission analysis and possible mission design, as well as necessary technology developments of such multi-CubeSat mission are identified and presented.

  • 19.
    Hestad, Theresia
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Barabash, Victoria
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Laufer, René
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    The APTAS student CubeSat Mission: A case study for reflective practitioner in education and student teams2023In: Advances in Space Research, ISSN 0273-1177, E-ISSN 1879-1948, Vol. 72, no 6, p. 2245-2258Article in journal (Refereed)
    Abstract [en]

    Despite the growing number of educational CubeSat projects, there is a lack of available literature related to analysis of good practices and lessons learned associated with learning environment of such university student projects, their internal organisational, and management issues. Difficulties arise when international standards, procedures and practices from professional satellite development projects must be adopted by student teams to their local projects. This paper discusses educational, organisational, and human factors that contribute to the success of the master student space projects at Luleå University of Technology, Kiruna Space Campus. The authors focus on project structure, management, working, and learning environment of the ongoing student CubeSat project APTAS and analyse problems and difficulties encountered in relation to the other actual student space projects at LTU. The result of quantitative and qualitative analysis of questionnaires, interviews, reflections and observations of the national and international master students is presented, and provides practical advice for university student teams and their supervisors.

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  • 20. Kirkwood, S.
    et al.
    Barabash, Victoria
    Belova, E.
    Nilsson, H.
    Rao, T.N.
    Stebel, K.
    Blum, U.
    Fricke, K-H.
    Osepian, A.
    Chilson, Phillip B.
    Polar mesosphere winter echoes by ESRAD, EISCAT and lidar2002Book (Other academic)
    Abstract [en]

    The ESRAD 52 MHz MST radar (67° 53 ‘ N, 21 ° 06 ‘ E) has observed thin layers of enhanced radar echoes in the winter mesosphere during several recent solar proton events. The detection of these polar mesosphere winter echoes (PMWE) is generally found to correlates well with low values of λ (the ratio of negative ion density to electron density). However PMWE are found to persist for values of λ up to ~100. Present knowledge of the nature of neutral turbulence in the winter mesosphere suggests that such turbulence cannot generate electron density fluctuations with scale-sizes as short as the 3 m needed to produce radar echoes at 52 MHz. This is particularly true as λ increases to ~100. Joint observations from ESRAD and the EISCAT 224 MHz radar suggest that PMWE is also detectable at 67 cm scale-sizes, further increasing the difficulty in explaining the echoes by neutral turbulence. Joint observations from ESRAD and lidar are also inconsistent with the expected behaviour of turbulence. Together with results concerning the thickness, echo aspect-sensitivity and echo spectral-width of the PMWE, these observation leads to the conclusion that the layers cannot be explained by turbulence alone. A role for charged aerosols in creating PMWE is proposed. The presence of aerosols is supported by the lidar observations.

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  • 21. Kirkwood, S.
    et al.
    Barabash, Victoria
    Belova, E.
    Nilsson, H.
    Rao, T.N.
    Stebel, K.
    Osepian, A.
    Chilson, Phillip B.
    Polar mesosphere winter echoes during solar proton event2002In: Advances in Polar Upper Atmosphere Research, Vol. 16, p. 111-125Article in journal (Refereed)
  • 22. Kirkwood, S.
    et al.
    Barabash, Victoria
    Brändström, B.U.E.
    Moström, A.
    Stebel, K.
    Mitchell, N.
    Hocking, W.
    Noctilucent clouds, PMSE and 5-day planetary waves: a case study2002In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 29, no 10, p. 1-4Article in journal (Refereed)
  • 23. Kirkwood, S.
    et al.
    Barabash, Victoria
    Chilson, P.
    Réchou, A.
    Stebel, K.
    Espy, P.
    Witt, G.
    Stegman, J.
    The 1997 PMSE season: its relation to wind, temperature and water vapor1998In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 25, no 11, p. 1867-1870Article in journal (Refereed)
  • 24.
    Moore, Alexander
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Hagermann, Axel
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Kaufmann, Erika
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Granvik, Mikael
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Barabash, Victoria
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Murdoch, Naomi
    Space Systems for Planetary Applications, ISAE-SUPAERO, Toulouse, France.
    Sunday, Cecily
    Space Systems for Planetary Applications, ISAE-SUPAERO, Toulouse, France.
    Miyamoto, Hideaki
    Department of Systems Innovation, University of Tokyo, Tokyo, Japan.
    Ogawa, Kazunori
    JAXA Space Exploration Center,Japan Aerospace Exploration Agency, Tokyo, Japan.
    Soria-Salinas, Alvaro
    Visiting Lecturer, Luleå, Kiruna, Sweden.
    Penetrometry in Microgravity- From Brie to Bennu2022In: EPSC Abstracts Vol. 16, 2022, Copernicus GmbH , 2022, article id EPSc2022-178Conference paper (Refereed)
    Abstract [en]

    In this abstract we discuss a proposal for a microgravity flight campaign within which we will investigate penetrometry in a microgravity environment. Understanding the mechanical properties of solar system minor bodies is essential for understanding their origin and evolution. Past missions such as Hayabusa-2 and OSIRIS-REX have landed on asteroids and taken samples to discover what these bodies are made of. However, there has been conflicting evidence and reports into the physical properties of the granular surface material of these bodies. With future missions such as JAXA’s MMX mission travelling to Phobos to take a sample of the body the results from this campaign will be very important to that and future missions. Penetrometry, i.e. the determination of the reaction force an object experiences as it penetrates into a surface, can help to understand the essential properties regarding regolith such as grain size, grain shape, cohesion and bulk density. The usage of penetrometry however has mostly been limited ground-based studies such as soil sciences or even cheese maturation. Very little is known about the underlying physics of penetrometry. Results of penetrometry experiments are largely analysed based on empirical models, which presents us with a challenge if we want to apply the same parameters to understand granular materials on asteroid surfaces. Obviously, gravity cannot be eliminated in the laboratory. Hence, it is essential to verify penetrometry as a method and validate penetrometry instrument designs in microgravity.

    For this purpose, we propose a parabolic flight campaign. Our experiment will test the use of penetrometry in asteroid-analogue environments by investigating samples with varying properties such as grain size and shape. The microgravity aspect of the experiment is one of the most important factors because it enables us to correlate laboratory experiments at 1g with identical setups in a gravity regime relevant to asteroids. The proposed experimental setup will include a variety of samples with varying grain sizes, grain shapes, porosities and grain size distributions. The penetrometer used will also have varying properties such as the diameter, shape, and velocity of penetration. A robotic arm will push a penetrometer into the samples to measure the reaction force which can then be used to determine the mechanical properties of the samples. By varying the samples and penetrometer properties it will be possible to better understand the relevant parameters affecting reaction force. The suitability of the setup will also be reviewed to understand its usage and applicability in microgravity environments such as the robotic arm that will be used. All of the experiments carried out during the parabolic campaign will also be done at 1g to compare the tests in varying gravity levels. With a better understanding of the science behind penetrometry and the effects of microgravity, future missions will be better prepared and be able to use penetrometry more effectively to understand small-body surfaces.

  • 25.
    Réchou, A.
    et al.
    Institutet för Rymdfysik, MRI-AFP, Box 812, S-981 28 Kiruna, Sweden.
    Barabash, Victoria
    Institutet för Rymdfysik, MRI-AFP, Box 812, S-981 28 Kiruna, Sweden.
    Chilson, P.
    Institutet för Rymdfysik, MRI-AFP, Box 812, S-981 28 Kiruna, Sweden.
    Kirkwood, S.
    Institutet för Rymdfysik, MRI-AFP, Box 812, S-981 28 Kiruna, Sweden.
    Savitskaya, T.
    Institutet för Rymdfysik, MRI-AFP, Box 812, S-981 28 Kiruna, Sweden.
    Stebel, K.
    Institutet för Rymdfysik, MRI-AFP, Box 812, S-981 28 Kiruna, Sweden.
    Mountain wave motions determined by the Esrange MST radar1999In: Annales Geophysicae, ISSN 0992-7689, E-ISSN 1432-0576, Vol. 17, p. 957-970Article in journal (Refereed)
  • 26.
    Schilling, Klaus
    et al.
    Julius-Maximilians Universität Würzburg, Informatik VII: Robotics & Telematics.
    Barabash, Victoria
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Space Master: An International, Interdisciplinary Master in Space Science and Technology2017Conference paper (Other academic)
    Abstract [en]

    The significant demand for aerospace engineers led 2005 to the foundation of the interdisciplinary program "SpaceMaster" by six European Universities. It was established in the European elite-program "Erasmus Mundus" to train talented young people in the challenging subject of space science and technology. The universities cooperate and contribute their special expertise to the courses in order to cover the broad interdisciplinary area of spacecraft design and space environment. In particular system design techniques are emphasized, which are of interest for a broad spectrum of industrial applications well beyond aerospace.

    The international dimension of this space education is reflected in the distribution of places for education: 1

    st semester in Würzburg (Germany), 2nd semester in Kiruna (Sweden), second year according to the desired specialization in one of the six partner European Universities. The successful students will receive double diploma from the two European Universities, where most credits were received. The student population is also very international: typically from about 600 applications 50 students are selected, half of them from Europe, the other half from outside Europe.

    The students are able to follow the more scientific tracks on space physics with an emphasis on instrumentation and astronomy, or atmospheric and planetary physics. The engineering tracks emphasize the design of spacecraft and mission realization. Here specifically the design of CanSats and educational CubeSats is used to complement the lectures by practical implementation aspects. For more than 10 years, the SpaceMaster-alumni encounter excellent career perspectives in industry, space agencies and research institutes.

    In this contribution the international university cooperation, the contents of the curriculum, as well as the specific challenges and acquired experiences in this international program are addressed.

  • 27. Stebel, K.
    et al.
    Barabash, Victoria
    Kirkwood, S.
    Siebert, J.
    Polar mesosphere summer echoes and noctilucent clouds: Simultaneous and common‐volume observations by radar, lidar and CCD camera2000In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 27, no 5, p. 661-664Article in journal (Refereed)
  • 28.
    Vomero, Mariapina
    et al.
    Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Japan.
    Kimura, Noriaki
    Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan.
    Milz, Mathias
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Barabash, Victoria
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Yamaguchi, Hajimi
    Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Japan.
    Large-Scale Sea Ice Divergence and Convergence Monitoring in the Arctic Ocean during Spring 20182021In: Okhotsk Sea and Polar Oceans Research (OSPOR), Okhotsk Sea and Polar Oceans Research Association (OSPORA) , 2021, p. 31-35Conference paper (Refereed)
    Abstract [en]

    This study investigates sea ice motion in the Arctic Ocean during the year 2018 to detect areas of ice deformation. We aim to improve the current understanding of large-scale sea ice circulation by examining ice convergence/divergence during the early melt-season. OSISAF sea ice drift data provided by EUMETSAT were used for the analysis during the months of March and April. Daily ice drifting speed and deformation parameters showed a strong correlation throughout the observed interval, while a local-scale analysis revealed different patterns for ice divergence and convergence in areas of enhanced ice drift.

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  • 29.
    Weighton, David
    et al.
    Luleå University of Technology.
    Pellinen-Wannberg, Asta
    Umeå universitet.
    Barabash, Victoria
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
    Molin, Sven
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    The development of masters programs in space science and technology in northern Scandinavia2008In: Proceedings of the 59th International Astronautical Congress: Glascow, Scotland, 29 Sept - 3 Oct 2008, 2008Conference paper (Other academic)
1 - 29 of 29
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