SPARTA Overview presentations

2024

Jun – CCMC Workshop 2024, College Park, MD (slides; video (at ~37:26-52:35)); ISWI Workshop, Neustrelitz, Germany

May – URSI Atlantic Radio Science Meeting 2024 (AT-RASC 2024), Gran Canaria, Spain

Apr – Space Weather Workshop 2024, Boulder, CO

Feb – National Academies Space Weather Roundtable (virtual)

Jan – AMS 104th Annual Meeting, Baltimore, MD

2023

Dec – AGU 2023, NASA HyperWall, San Francisco, CA,

Nov – UMass-Lowell LoCSST Seminar, Lowell, MA

2025

Blinstrubas, G., English, A., Stuart, D. J., Hampton, D. L., Lamarche, L., Nishimura, Y., & Datta-Barua, S., “Comparative Hypothesis Testing of Auroral Ionospheric Layer Causing Global Navigation Satellite System Scintillation”, Space Weather, 23, 1, 2024SW004069, 2025. doi:10.1029/2024SW004069 https://doi.org/10.1029/2024SW004069

Cheng, P.-H. & Morton, Y. J., “Observation of Large-Scale Traveling Ionospheric Disturbances in the Topside Ionosphere Using POD TEC From Multiple LEO Satellites Constellations”, Journal of Geophysical Research (Space Physics), 130, e2024JA033293, 2025. doi:10.1029/2024JA033293 https://doi.org/10.1029/2024JA033293

Díaz Peña, J., Semeter, J., Zettergren, M., Nishimura, Y., Hirsch, M., Oppenheim, M., Dimant, Y., & Walsh, B. M., “Impact of E-Region Plasma Turbulence on Formation and Evolution of SAID/STEVE”, Journal of Geophysical Research (Space Physics), 130, e2025JA033808, 2025. doi:10.1029/2025JA033808 https://doi.org/10.1029/2025JA033808

Nishimura, Y., Lyons, L. R., Gabrielse, C., Donovan, E. F., & Angelopoulos, V., “Transition Between Substorm Auroral Onset and Expansion Phase Activity”, Journal of Geophysical Research (Space Physics), 130, e2025JA033770, 2025. doi:10.1029/2025JA033770 https://doi.org/10.1029/2025JA033770

Qin, M., Li, W., Nishimura, Y., Huang, S., Ma, Q., Hanzelka, M., Capannolo, L., Shen, X.-C., Angelopoulos, V., An, X., Artemyev, A. V., & Gan, L. “Sub-MeV Electron Precipitation Driven by EMIC Waves in Plasmaspheric Plumes at High L Shells”, Journal of Geophysical Research (Space Physics), 130, 2025JA033756, 2025. doi:10.1029/2025JA033756 https://doi.org/10.1029/2025JA033756

Younas, W., Khan, M., Amory-Mazaudier, C., Nishimura, Y., & Kamran, M., “Spatio-temporal features of ionospheric disturbances resulting from March 2023 geomagnetic storm: Comparisons with March 2015 St. Patrick’s Day storm”, Advances in Space Research, 75, 2433, 2025. doi:10.1016/j.asr.2024.10.042 https://doi.org/10.1016/j.asr.2024.10.042

2024

2024

Artemyev, A., Nishimura, Y., Angelopoulos, V., Zhang, X.-J., & Bortnik, J., “Rapid Transport of Energetic Electrons to Low L-Shells: The Key Role of Electric Fields”, Journal of Geophysical Research (Space Physics), 129, e2024JA033136, 2024. https://doi.org/10.1029/2024JA033136

Chen, R. H., Nishimura, Y., Liao, W., Semeter, J. L., Zettergren, M. D., Donovan, E. F., & Angelopoulos, V. “Subauroral TEC Enhancement, GNSS Scintillation, and Positioning Error During STEVE”, Journal of Geophysical Research (Space Physics), 129, 2024JA033345, 2024. https://doi.org/10.1029/2024JA033345

Cheng, P.-H., Y. Wang, L. Liu, and Y. Jade Morton (2024). Detection of traveling ionospheric disturbances triggered by 2022 Tonga volcanic eruptions through CubeSats coherent GNSS-Reflectometry measurement. J. Geophy. Res., Space Physics, https://doi.org/10.1029/2023JA032229

Díaz Peña, J., Zettergren, M., Semeter, J., Nishimura, Y., Hirsch, M., & Walsh, B. M. (2024). 3D simulation of an extreme SAID flow channel. Journal of Geophysical Research: Space Physics, 129, e2024JA032660

Foster, J. C., Erickson, P. J., Nishimura, Y., Zhang, S. R., Bush, D. C., Coster, A. J., Meade, P. E., & Franco-Diaz, E., “Imaging the May 2024 Extreme Aurora With Ionospheric Total Electron Content”, Geophysical Research Letters, 51, e2024GL111981, 2024. https://doi.org/10.1029/2024GL111981

Gallardo-Lacourt, B., Nishimura, Y., Kepko, L., Spanswick, E., Gillies, D.M., Knudsen, D.J., Burchill J. K., Skone, S. H., Pinto, V. A., Chaddock, D., Kuzub, J., & Donovan, E. F. “Unexpected STEVE Observations at High Latitude During Quiet Geomagnetic Conditions”, Geophysical Research Letters, 51, e2024GL110568, 2024. https://doi.org/10.1029/2024GL110568

Liu, T. Z., Angelopoulos, V., Nishimura, Y., Shen, Y., Shi, X., & Hartinger, M. D., “Near-Earth Reconnection Contributing to Recovery Phase of Geomagnetic Storm”, Geophysical Research Letters, 51, 2024GL112730, 2024. https://doi.org/10.1029/2024GL112730

Lyons, L. R., Yukitoshi Nishimura, Jiang Liu, Sneha Yadav, Ying Zou, William A. Bristow, Eric Donovan, Nozomu Nishitani (2024), Space Weather with an Arc’s ~2 hr Trip Across the Nightside Polar Cap, Front. Astron. Space Sci., 2024. https://doi.org/10.3389/fspas.2023.1309870

Madhanakumar, M., Spicher, A., Vierinen, J., Oksavik, K., Coster, A. J., Huyghebaert, D. R., Martin, C. J., Häggström, I., & Paxton, L. J. “The Growth and Decay of Intense GNSS Amplitude and Phase Scintillation During Non-Storm Conditions”, Space Weather, 22, 2024SW004108, 2024. https://doi.org/10.1029/2024SW004108

Nishimura, Y., Gallardo-Lacourt, B., Donovan, E. F., Angelopoulos, V., & Nishitani, N., “Auroral and Magnetotail Dynamics During Quiet-Time STEVE and SAID”, Journal of Geophysical Research (Space Physics), 129, 2024JA032941, 2024. https://doi.org/10.1029/2024JA032941

Nishimura, Y., Lyons, L. R., Deng, Y., Sheng, C. Bristow, W. A., Donovan, E. F., Angelopoulos, V., & Nishitani, N., “Obtaining Continental-Scale, High-Resolution 2-D Ionospheric Flows and Application to Meso-Scale Flow Science”, Journal of Geophysical Research (Space Physics), 129, e2024JA032924, 2024. https://doi.org/10.1029/2024JA032924

Vaggu, P. R., Zettergren, M., Deshpande, K., Nishimura, Y., Semeter, J., Hirsch, M., et al. (2024). Model-based investigation of electron precipitation-driven density structures and their effects on auroral scintillation. Journal of Geophysical Research: Space Physics, 129, e2024JA032443.

Yizengaw, E., “The Impact and Sources of Radio Frequency Interference on GNSS Signals”, Radio Science, 59, 2024RS008109, 2024. doi:10.1029/2024RS008109 https://doi.org/10.1029/2024RS008109

2023

Nishimura, Y., Dyer, A., Donovan, E. F., & Angelopoulos, V., “Fine-scale structures of STEVE revealed by 4K imaging”, Journal of Geophysical Research: Space Physics, 128, e2023JA032008, 2023. https://doi.org/10.1029/2024JA032660