Abstract
In this work, we study the spatial structure of the polarization jet based on data from the NorSat-1 and Swarm ionospheric satellites during a geomagnetic storm. A comparative analysis of the electron density and temperature dependence on the invariant latitude is carried out simultaneously according to measurements of the NorSat-1 and Swarm C satellites during their crossing of the polarization jet. The dependence of the invariant latitude of polarization jet on the auroral geomagnetic activity and on the magnetic local time is confirmed. A double structure of polarization jet is discovered as well as small-scale spatial structures inside the jet with a size of 0.1°–0.2°. It is found that spatial structures are not local and are extended in longitude for at least 2 h of magnetic local time.
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ACKNOWLEDGMENTS
We are grateful to the World Geomagnetism Data Center in Kyoto (http://wdc.kugi.kyotou.ac.jp), SuperMAG member organizations and national agencies (http://supermag. jhuapl.edu/info) for providing geomagnetic activity index data, and the European Space Agency for accessing data from the Swarm satellite mission (https://Swarm-diss.eo. esa.int/#Swarm/Advanced/Plasma_Data). We are also grateful to the University of Oslo and personally to Lasse Klausen for access to measurements with Langmuir probes by the NorSat-1 satellite (http://tid.uio.no/plasma/norsat).
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Sinevich, A.A., Chernyshov, A.A., Chugunin, D.V. et al. Spatial Structure of Polarization Jet according to NorSat-1 and Swarm Satellite Data. Cosmic Res 59, 463–471 (2021). https://doi.org/10.1134/S0010952521060095
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DOI: https://doi.org/10.1134/S0010952521060095