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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 K.  Collins, Hartinger, M., Zimmerman, K., Salzano, M., and Burrell, A., ?conjugate_map: A Python package for calculating geomagnetic conjugate points?, SoftwareX, vol. 32, p. 102354, 2025.\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 K.  Collins, Kazdan, D., and Frissell, N., ?Ham Radio Forms a Planet-Sized Space Weather Sensor Network?, Eos, vol. 102, 2021.\par \par N. A.  Frissell, Joshi, D. Raj, Collins, K., Aidan, M., Kazdan, D., Engelke, W. D., Atkison, T., Kim, H., Cowling, S. H., McDermott, T. C., Ackermann, J., Witten, D., Madey, J., H. Silver, W., Liles, W., Cerwin, S. A., Erickson, P. J., Miller, E. S., and Vierinen, J., ?HamSCI Personal Space Weather Station (PSWS): Fall 2021 Update?, TAPR-ARRL Digital Communications Conference. ARRL-TAPR, Virtual, 2021.\par \par V. I.  Romanek, Frissell, N. A., Joshi, D. Raj, Liles, W., Trop, C., Collins, K., and Perry, G. W., ?HF Doppler Observations of Traveling Ionospheric Disturbances in the WWV Signal Received with a Network of Low-Cost HamSCI Personal Space Weather Stations?, ARRL-TAPR Digital Communications Conference. ARRL-TAPR, Virtual, 2021.\par \par V. I.  Romanek, Frissell, N. A., Joshi, D. Raj, Liles, W., Trop, C., Collins, K., and Perry, G. W., ?HF Doppler Observations of Traveling Ionospheric Disturbances in the WWV Signal Received with a Network of Low-Cost HamSCI Personal Space Weather Stations?, in American Geophysical Union Fall Meeting, New Orleans, LA, 2021.\par \par }