@article{MTMT:34792341, title = {3D pressure-corrected ballistic extrapolation of solar wind speed in the inner heliosphere}, url = {https://m2.mtmt.hu/api/publication/34792341}, author = {Timár, Anikó and Opitz, Andrea and Németh, Zoltán and Márkusné Bebesi, Zsófia and Biró, Nikolett and Facskó, Gábor István and Kobán, Gergely and Madár, Ákos}, doi = {10.1051/swsc/2024010}, journal-iso = {J SPACE WEATHER SPACE CLIMATE}, journal = {JOURNAL OF SPACE WEATHER AND SPACE CLIMATE}, unique-id = {34792341}, issn = {2115-7251}, abstract = {Solar wind parameters at different locations in the inner heliosphere can be estimated using various solar wind extrapolation methods. The simple ballistic method extrapolates solar wind parameters from the point of measurement to a chosen heliospheric position by assuming that major solar wind structures are persistent and arrive relatively unaltered to the target position. The method considers the rotation period of the Sun while assuming a constant solar wind speed during radial propagation. We improve the simple ballistic model by considering the interaction between the slow and the fast solar wind with a pressure-correction during the propagation. Instead of extrapolating from the position of a single spacecraft, we apply this pressure-corrected ballistic method to 2D speed maps of the solar source surface available from solar coronal models to determine the solar wind speed in the inner heliosphere in 3D, between latitudes of ±50°. We also take into account the effects of the solar differential rotation in our model. Our method is simple, fast and it can be applied to different source surface datasets. The results of our model are validated with in situ data from the ACE spacecraft. We find that the pressure-corrected ballistic method can give accurate predictions of the solar wind in 3D.}, year = {2024}, eissn = {2115-7251}, orcid-numbers = {Németh, Zoltán/0000-0001-9527-3447; Facskó, Gábor István/0000-0001-9502-2816} } @{MTMT:34742478, title = {Space Weather Effects on Critical Infrastructure}, url = {https://m2.mtmt.hu/api/publication/34742478}, author = {Facskó, Gábor István and Kobán, Gergely and Biró, Nikolett and Lkhagvadorj, Munkhjargal}, booktitle = {Critical Infrastructure Protection in the Light of the Armed Conflicts}, doi = {10.1007/978-3-031-47990-8_5}, unique-id = {34742478}, abstract = {Gas pipelines, transmission lines, overhead wires, transformers, GNSS navigation, and telecommunication systems are part of critical infrastructure. Industry, transportation, service operations, farming, and everyday life highly depend on this infrastructure. However, these systems are very sensitive to solar activity. Therefore, all activities above are vulnerable and defenseless against the catastrophic changes in Earth’s cosmic environment. The Solar System is dominated by the influence of our star. In the Solar System, all objects are gravitationally bound and the radiation of the Sun provides the energy for example for the terrestrial biosphere. A small fraction of the energy produced in the core of our star turns into a magnetic field and emits the constant high-velocity flow, the solar wind. Solar magnetic activity produces radiation and ejects matter from the upper atmosphere of our star. The magnetic field of the solar wind interacts with the planetary magnetic fields and atmospheres. These phenomena, called Space Weather have a serious influence on the radiation environment of Earth where telecommunication, Global Navigation Satellite System, meteorological, and other purpose satellites are located. The conductivity and transparency of the higher partly ionized atmospheric layer, the ionosphere also depend on solar radiation and activity. This fact makes the navigation and communication systems dependent on solar activity. Finally, the solar magnetic activity creates magnetic variations in the terrestrial magnetic field and induces currents in gas pipelines, transmission lines, overhead wires, and transformers. In this short briefing, we introduce the solar activity phenomena, and their influence on our planet’s cosmic neighborhood and pro- vide a detailed description of the Space Weather effects on critical infrastructure. We describe the Hungarian national and global space weather forecast centres and capabilities. Finally, we share some guidelines on how to prepare for extreme space weather events.}, year = {2024}, pages = {45-56}, orcid-numbers = {Facskó, Gábor István/0000-0001-9502-2816} } @misc{MTMT:34558001, title = {Coherent structures in the Inner Heliosphere: Interplanetary discontinuities}, url = {https://m2.mtmt.hu/api/publication/34558001}, author = {Madár, Ákos and Erdős, Géza and Németh, Zoltán and Opitz, Andrea and Facskó, Gábor István and Kobán, Gergely and Biró, Nikolett and Timár, Anikó}, unique-id = {34558001}, year = {2023}, orcid-numbers = {Németh, Zoltán/0000-0001-9527-3447; Facskó, Gábor István/0000-0001-9502-2816} } @misc{MTMT:34557966, title = {Napszél struktúrák térbeli és időbeli fejlődése a belső helioszférában}, url = {https://m2.mtmt.hu/api/publication/34557966}, author = {Biró, Nikolett and Opitz, Andrea and Németh, Zoltán and Timár, Anikó and Kobán, Gergely and Lkhagvadorj, Munkhjargal and Facskó, Gábor István and Madár, Ákos}, unique-id = {34557966}, year = {2023}, orcid-numbers = {Németh, Zoltán/0000-0001-9527-3447; Facskó, Gábor István/0000-0001-9502-2816} } @misc{MTMT:34132965, title = {Wigner Research Centre for Physics, Institute for Particle and Nuclear Physics, Dept. of Space Physics and Space Technology. Wigner 121 Scientific Symposium, Budapest, September 18-20, 2023}, url = {https://m2.mtmt.hu/api/publication/34132965}, author = {Márkusné Bebesi, Zsófia and Biró, Nikolett and Erdős, Géza and Facskó, Gábor István and Földy, Lajos and Juhász, Antal and Kobán, Gergely and Kovács, Péter Gábor and Madár, Ákos and Talafha, Mohammed and Opitz, Andrea and Szalai, S. and Tátrallyay, Mariella and Timár, Anikó and Tomasik, M. and Németh, Zoltán}, unique-id = {34132965}, abstract = {The main research interest of our Department is the Solar System and its physical processes. It includes a complex regime of interactions, like the study of the solar interior, its physical processes, and the effect the solar wind and the interplanetary magnetic field on the ionospheres, and/or magnetospheres of planets, moons, and other objects in our Solar System (like comets). We are interested in comparing and finding analogies on the plasma environments of planets as well. Also it is vital to understand how our direct cosmic environment can affect our own planet, so space weather is another important topic that we focus on. In order to engage in answering these questions we use the science data measured by several different space missions. We are actively participating in the international mission teams, and take part in data analysis and the publication of new results. Our team has been involved in several major space missions from the earliest planning phases through the development, building and testing of onboard instruments and finally the evaluation of the measurements in space. The paper presents some of our current researches and achievements.}, year = {2023}, orcid-numbers = {Facskó, Gábor István/0000-0001-9502-2816; Németh, Zoltán/0000-0001-9527-3447} } @misc{MTMT:34024746, title = {Conjugated observations of interplanetary shocks}, url = {https://m2.mtmt.hu/api/publication/34024746}, author = {Facskó, Gábor István and Lkhagvadorj, Munkhjargal and Opitz, Andrea}, unique-id = {34024746}, year = {2023}, orcid-numbers = {Facskó, Gábor István/0000-0001-9502-2816} } @misc{MTMT:34024745, title = {Extreme Space Weather Impact on Critical Infrastructure}, url = {https://m2.mtmt.hu/api/publication/34024745}, author = {Facskó, Gábor István and Kobán, Gergely and Biró, Nikolett and Lkhagvadorj, Munkhjargal}, unique-id = {34024745}, year = {2023}, orcid-numbers = {Facskó, Gábor István/0000-0001-9502-2816} } @misc{MTMT:33806088, title = {Hétköznapi Űrkutatás}, url = {https://m2.mtmt.hu/api/publication/33806088}, author = {Facskó, Gábor István}, unique-id = {33806088}, abstract = {Az űrkutatás és az űrtechnológiák mindennapjaink részévé váltak, eredményeik mindenki javára válnak. Az űrtechnológiák fejlesztését az államok helyett egyre inkább magáncégek veszik át és így egyre olcsóbb eszközök válnak elérhetővé. Az űrtevékenység a Föld környezetére koncentrál, eredményeivel megkönnyítve a hétköznapi tájékozódást navigációs rendszerek segítségével. A műholdas távközlés közel hozza egymáshoz a bolygó különböző részein élőket. A meteorológia, a mezőgazdaság és felderítés sem nélkülözheti a Föld körül keringő műholdakat. Szerencsés korban élünk, amikor az emberiség végre meg tudja védeni magát a bolygón kívülről érkező veszélyekkel szemben.}, year = {2023}, orcid-numbers = {Facskó, Gábor István/0000-0001-9502-2816} } @inproceedings{MTMT:33758323, title = {A földi magnetoszféra egy év hosszú magnetohidrodinamikai szimulációjánakösszehasonlítása Cluster mérésekkel}, url = {https://m2.mtmt.hu/api/publication/33758323}, author = {Facskó, Gábor István and David, Sibeck and Ilja, Honkonen and Bór, József and German, Farinas Perez and Timár, Anikó and Yuri, Shprits and Pyry, Peitso and Laura, Degener and Eija, Tanskanen and Chandrasekhar, Anekallu and Szalai, Sándor and Kis, Árpád and Wesztergom, Viktor and Madár, Ákos and Biró, Nikolett and Kobán, Gergely and Illyés, András and Lkhagvadorj, Munkhjargal}, booktitle = {Magyar Űrkutatási Fórum 2021 - Válogatott közlemények}, unique-id = {33758323}, year = {2023}, orcid-numbers = {Facskó, Gábor István/0000-0001-9502-2816} } @article{MTMT:33532115, title = {Improving ERT Imaging of Small-Size 2D Targets Using Different Strategies}, url = {https://m2.mtmt.hu/api/publication/33532115}, author = {Szalai, Sándor and Baracza, Mátyás Krisztián and Kárpi, Marcell and Szűcs, Péter and Metwaly, M. and Turai, Endre and Facskó, Gábor István and Zubair, M. and Szarka, László Csaba and Gribovszki, Katalin Eszter}, doi = {10.1007/s00024-022-03204-8}, journal-iso = {PURE APPL GEOPHYS}, journal = {PURE AND APPLIED GEOPHYSICS}, volume = {180}, unique-id = {33532115}, issn = {0033-4553}, year = {2023}, eissn = {1420-9136}, pages = {157-185}, orcid-numbers = {Facskó, Gábor István/0000-0001-9502-2816; Gribovszki, Katalin Eszter/0000-0003-2577-0127} }