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

Artemyev, A., Nishimura, Y., Zhang, X.-J., & Angelopoulos, V. (2025). “On energetic electron precipitation in auroral arcs”. Geophysical Research Letters, 52, e2025GL118589. https://doi.org/10.1029/2025GL118589

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. https://doi.org/10.1029/2024SW004069

Chang, H., Morton, Y. J., Brandmeyer, J., & Themens, D. R. (2025). “Analysis of ionospheric response to the May 2024 geomagnetic superstorm using commercial radio occultation satellites and ground-based instruments”. Journal of Geophysical Research: Space Physics, 130, e2025JA034517. https://doi.org/10.1029/2025JA034517

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. 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. https://doi.org/10.1029/2025JA033808

Eriksen, N. K., Y. Nishimura, M. Zettergren, D. A. Lorentzen, K. Oksavik, L. J. Baddeley, K. Hosokawa, K. Shiokawa, L. Lamarche, M. E. Redden, A. Bhatt (2025). “Evolution and decay of a stable and a dynamic airglow patch”, Journal of Atmospheric and Solar-Terrestrial Physics, 275, 106593, https://doi.org/10.1016/j.jastp.2025.106593

Kim, M. J., Nishimura, Y., Deng, Y., Sheng, C., Lyons, L. R., & Conde, M. G. (2025). “Investigation of thermospheric horizontal and vertical neutral winds via tristatic observations over Alaska”. Journal of Geophysical Research: Space Physics, 130, e2024JA033631. https://doi.org/10.1029/2024JA033631

Kirchman, A., & Hysell, D. L. (2025). “Persistence of the prereversal enhancement of the equatorial vertical plasma drifts observed by ICON”. Geophysical Research Letters, 52, e2025GL118390. https://doi.org/10.1029/2025GL118390

Kunduri, B. S. R., Baker, J. B. H., Ruohoniemi, J. M., St. Maurice, J.-P., Nishimura, Y., Erickson, P. J., Foster, J. C., Milan, S. E., Sterne, K. T., & Thomas, E. G. (2025). “Unusual SuperDARN backscatter during the 11 May 2024 geomagnetic storm”. Space Weather, 23, e2025SW004701. https://doi.org/10.1029/2025SW004701

Maute, A., T. Durgonics, J. Huba, R. Imam, H. Liu, G. Malhotra, J. Retterer, C. C. Stephan, C. Stolle & E. Yizengaw, (2025) “Challenges and Gaps in Understanding and Monitoring Low-Latitude F-region Plasma Irregularities”. Surv Geophys. https://doi.org/10.1007/s10712-025-09917-4

Ngwira C. M., Nishimura Y., Weygand J. M., Landwer L. J., Bush D. C., Foster J. C., and Erickson P. J. (2025) “Evaluating the geomagnetic response to the May 2024 super storm – observations and interpretations”. Front. Astron. Space Sci. 12:1652705. https://doi.org/10.3389/fspas.2025.1652705

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. 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. https://doi.org/10.1029/2025JA033756

Shen, Y., Zhang, X., Liang, J., Artemyev, A., Angelopoulos, V., Spanswick, E., Lyons, L., & Nishimura, Y. (2025). “Streamer-like red line diffuse auroras driven by time domain structures associated with electron injection and braking ion flows”. Geophysical Research Letters, 52, e2025GL116516. https://doi.org/10.1029/2025GL116516

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. https://doi.org/10.1016/j.asr.2024.10.042

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