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S.  Fernandes, Perry, G. W., Trigo, T., Frissell, N. A., Gibbons, J., and Collins, K., ?Characterizing ionospheric variability through HF Doppler measurements: a statistical and numerical ray tracing analysis?, Frontiers in Astronomy and Space Sciences, vol. 13, 2026.\par \par H.  Kim, Witten, D., Madey, J., Frissell, N., Gibbons, J., Engelke, W., Liddle, A., Muscolino, N., Visone, J., and Cao, Z., ?Citizen science: Development of a low-cost magnetometer system for a coordinated space weather monitoring?, HardwareX, vol. 20, p. e00580, 2024.\par \par K.  Collins, Gibbons, J., Frissell, N., Montare, A., Kazdan, D., Kalmbach, D., Swartz, D., Benedict, R., Romanek, V., Boedicker, R., Liles, W., Engelke, W., McGaw, D. G., Farmer, J., Mikitin, G., Hobart, J., Kavanagh, G., and Chakraborty, S., ?Crowdsourced Doppler measurements of time standard stations demonstrating ionospheric variability?, Earth System Science Data, vol. 15, no. 3, pp. 1403 - 1418, 2023.\par \par J. R.  Hobart, Farmer, J. O., Mikitin, G., Waugh, D., Benedict, R., Cerwin, S. A., Collins, K. V., Kazdan, D., Gibbons, J., Romanek, V. I., and Frissell, N. A., ?Construction and Operation of a HamSCI Grape Version 1 Personal Space Weather Station: A Citizen Scientist?s Perspective?, in American Geophysical Union Fall Meeting, New Orleans, LA, 2021.\par \par }