Articles | Volume 15, issue 2
https://doi.org/10.5194/gi-15-273-2026
https://doi.org/10.5194/gi-15-273-2026
Research article
 | 
12 Oct 2026
Research article |  | 12 Oct 2026

THEMIS: spin axis magnetic field reconstruction

Adrian Pöppelwerth, Hans-Ulrich Auster, Vassilis Angelopoulos, James M. McTiernan, James W. Lewis, and Ferdinand Plaschke

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Cited articles

Alken, P., Thébault, E., Beggan, C. D., et al.: International Geomagnetic Reference Field: the thirteenth generation, Earth Planets Space, 73, https://doi.org/10.1186/s40623-020-01288-x, 2021. a
Angelopoulos, V.: The THEMIS Mission, Space Sci. Rev., 141, 5–34, https://doi.org/10.1007/s11214-008-9336-1, 2008. a
Angelopoulos, V., Cruce, P., Drozdov, A., et al.: The Space Physics Environment Data Analysis System (SPEDAS), Space Sci. Rev., 215, 9, https://doi.org/10.1007/s11214-018-0576-4, 2019. a
Angelopoulos, V., Lewis, J., McTiernan, J., Grimes, E., Russell, C., Drozdov, A., Cruce, P., Hatzigeorgiu, N., Wu, J., Larson, D., McFadden, J., and Flores, A.: SPEDAS (Space Physics Environment Data Analysis System), Version 6.1, Zenodo [code], https://doi.org/10.5281/zenodo.15023025, 2024. a
Auster, H., Glassmeier, K., Magnes, W., andW. Baumjohann, O. A., Constantinescu, D., Fischer, D., Fornacon, K., Georgescu, E., Harvey, P., Hillenmaier, O., Kroth, R., Ludlam, M., Narita, Y., Nakamura, R., Okrafka, K., Plaschke, F., Richter, I., Schwarzl, H., Stoll, B., Valavanoglou, A., and Wiedemann, M.: The THEMIS Fluxgate Magnetometer, Space Sci. Rev., 141, 235–264, https://doi.org/10.1007/s11214-008-9365-9, 2008. a, b, c, d, e
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Short summary
The Time History of Events and Macroscale Interactions during Substorms mission studies how the solar wind interacts with Earth’s magnetic field using five rotating spacecraft. After one spacecraft lost its measurements along its rotation axis, we used the two remaining magnetometer components with the spacecraft's spin to reconstruct the missing component with lower time resolution. A comparison with earlier data, when all components were available, shows that reconstruction is possible.
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