Publications

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Presentation
N. A. Frissell, Liles, W., Collins, K., and Kazdan, D., “The Great Collegiate Shortwave Listening Contest”. 2020.
Magazine Article
S. Cowling, “Hands-On-SDR: TangerineSDR”, QEX, pp. 10-15, 2020.
K. V. Collins, Kazdan, D., and Frissell, N., “Ham Radio Creates a Planet-Sized Space Weather Sensor Network”, QST, vol. 105, 12 vol., no. 8, pp. 55-58, 2021.
Journal Article
A. T. Chartier, Steele, J., Sugar, G., Themens, D. R., Vines, S. K., and Huba, J. D., “Validating Ionospheric Models Against Technologically Relevant MetricsAbstractPlain Language SummaryKey Points”, Space Weather, vol. 21, no. 12, 2023.
S. Chakraborty, Bullett, T., Barjatya, A., and Mabie, J., “pynasonde:An open-source Python library for ionosonde data processing”, SoftwareX, vol. 34, p. 102617, 2026.
N. A. Frissell, Miller, E. S., Kaeppler, S. R., Ceglia, F., Pascoe, D., Sinanis, N., Smith, P., Williams, R., and Shovkoplyas, A., “Ionospheric Sounding Using Real-Time Amateur Radio Reporting Networks”, Space Weather, vol. 12, pp. 651–656, 2014.
S. Cerwin, “Ionospheric Disturbances at Dawn, Dusk, and During the 2017 Eclipse”, QEX, no. 310, pp. 8-14, 2018.
N. A. Frissell, Ackermann, J. R., Alexander, J. N., Benedict, R. L., Blackwell, W. C., Boedicker, R. K., Cerwin, S. A., Collins, K. V., Cowling, S. H., Deacon, C., Diehl, D. M., Di Mare, F., Duffy, T. J., Edson, L. Brandt, Engelke, W. D., Farmer, J. O., Frissell, R. M., Gerzoff, R. B., Gibbons, J., Griffiths, G., Holm, S., Howell, F. M., Kaeppler, S. R., Kavanagh, G., Kazdan, D., Kim, H., Larsen, D. R., Ledvina, V. E., Liles, W., Lo, S., Lombardi, M. A., MacDonald, E. A., Madey, J., McDermott, T. C., McGaw, D. G., McGwier, R. W., Mikitin, G. A., Miller, E. S., Mitchell, C., Montare, A., Nguyen, C. D., Nordberg, P. N., Perry, G. W., Piccini, G. N., Pozerski, S. W., Reif, R. H., Rizzo, J. D., Robinett, R. S., Romanek, V. I., Sami, S., Sanchez, D. F., Sarwar, M. Shaaf, Schwartz, J. A., H. Serra, L., H. Silver, W., Skov, T. Mulligan, Swartz, D. A., Themens, D. R., Tholley, F. H., West, M. Lou, Wilcox, R. C., Witten, D., Witvliet, B. A., and Yadav, N., “Heliophysics and amateur radio: citizen science collaborations for atmospheric, ionospheric, and space physics research and operations”, Frontiers in Astronomy and Space Sciences, vol. 10, 2023.
N. A. Frissell, Ackermann, J. R., Alexander, J. N., Benedict, R. L., Blackwell, W. C., Boedicker, R. K., Cerwin, S. A., Collins, K. V., Cowling, S. H., Deacon, C., Diehl, D. M., Di Mare, F., Duffy, T. J., Edson, L. Brandt, Engelke, W. D., Farmer, J. O., Frissell, R. M., Gerzoff, R. B., Gibbons, J., Griffiths, G., Holm, S., Howell, F. M., Kaeppler, S. R., Kavanagh, G., Kazdan, D., Kim, H., Larsen, D. R., Ledvina, V. E., Liles, W., Lo, S., Lombardi, M. A., MacDonald, E. A., Madey, J., McDermott, T. C., McGaw, D. G., McGwier, R. W., Mikitin, G. A., Miller, E. S., Mitchell, C., Montare, A., Nguyen, C. D., Nordberg, P. N., Perry, G. W., Piccini, G. N., Pozerski, S. W., Reif, R. H., Rizzo, J. D., Robinett, R. S., Romanek, V. I., Sami, S., Sanchez, D. F., Sarwar, M. Shaaf, Schwartz, J. A., H. Serra, L., H. Silver, W., Skov, T. Mulligan, Swartz, D. A., Themens, D. R., Tholley, F. H., West, M. Lou, Wilcox, R. C., Witten, D., Witvliet, B. A., and Yadav, N., “Heliophysics and amateur radio: citizen science collaborations for atmospheric, ionospheric, and space physics research and operations”, Frontiers in Astronomy and Space Sciences, vol. 10, 2023.
N. A. Frissell, Ackermann, J. R., Alexander, J. N., Benedict, R. L., Blackwell, W. C., Boedicker, R. K., Cerwin, S. A., Collins, K. V., Cowling, S. H., Deacon, C., Diehl, D. M., Di Mare, F., Duffy, T. J., Edson, L. Brandt, Engelke, W. D., Farmer, J. O., Frissell, R. M., Gerzoff, R. B., Gibbons, J., Griffiths, G., Holm, S., Howell, F. M., Kaeppler, S. R., Kavanagh, G., Kazdan, D., Kim, H., Larsen, D. R., Ledvina, V. E., Liles, W., Lo, S., Lombardi, M. A., MacDonald, E. A., Madey, J., McDermott, T. C., McGaw, D. G., McGwier, R. W., Mikitin, G. A., Miller, E. S., Mitchell, C., Montare, A., Nguyen, C. D., Nordberg, P. N., Perry, G. W., Piccini, G. N., Pozerski, S. W., Reif, R. H., Rizzo, J. D., Robinett, R. S., Romanek, V. I., Sami, S., Sanchez, D. F., Sarwar, M. Shaaf, Schwartz, J. A., H. Serra, L., H. Silver, W., Skov, T. Mulligan, Swartz, D. A., Themens, D. R., Tholley, F. H., West, M. Lou, Wilcox, R. C., Witten, D., Witvliet, B. A., and Yadav, N., “Heliophysics and amateur radio: citizen science collaborations for atmospheric, ionospheric, and space physics research and operations”, Frontiers in Astronomy and Space Sciences, vol. 10, 2023.
S. A. Cerwin, McMahan, J. T., Papadopoulos, A. S., Piccini, G. N., Frissell, N. A., Collins, K. V., Montare, A., Bilberry, P., Blackshear, S., and Themens, D. R., “HamSCI HF multipath propagation mode analysis using amateur radios and audio waveforms sensitive to time difference of arrival”, Frontiers in Astronomy and Space Sciences, vol. 13, 2026.
S. A. Cerwin, McMahan, J. T., Papadopoulos, A. S., Piccini, G. N., Frissell, N. A., Collins, K. V., Montare, A., Bilberry, P., Blackshear, S., and Themens, D. R., “HamSCI HF multipath propagation mode analysis using amateur radios and audio waveforms sensitive to time difference of arrival”, Frontiers in Astronomy and Space Sciences, vol. 13, 2026.
K. Collins, Kazdan, D., and Frissell, N., “Ham Radio Forms a Planet-Sized Space Weather Sensor Network”, Eos, vol. 102, 2021.
N. A. Frissell, Brandt, L., Cerwin, S. A., Collins, K. V., Duffy, T. J., Kazdan, D., Gibbons, J., Engelke, W. D., Frissell, R. M., Gerzoff, R. B., Kaeppler, S. R., Ledvina, V., Liles, W., MacDonald, E., Perry, G. W., Rizzo, J. D., Sanchez, D. F., H. Serra, L., H. Silver, W., Skov, T. Mulligan, and West, M. Lou, “Fostering Collaborations with the Amateur Radio Community”, White Paper Submitted to the National Academy of Sciences Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033, 2022.
N. A. Frissell, Brandt, L., Cerwin, S. A., Collins, K. V., Duffy, T. J., Kazdan, D., Gibbons, J., Engelke, W. D., Frissell, R. M., Gerzoff, R. B., Kaeppler, S. R., Ledvina, V., Liles, W., MacDonald, E., Perry, G. W., Rizzo, J. D., Sanchez, D. F., H. Serra, L., H. Silver, W., Skov, T. Mulligan, and West, M. Lou, “Fostering Collaborations with the Amateur Radio Community”, White Paper Submitted to the National Academy of Sciences Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033, 2022.
A. C. Cushley, Kabin, K., and Noël, J. - M., “Faraday Rotation of Automatic Dependent Surveillance-Broadcast (ADS-B) Signals as a Method of Ionospheric Characterization”, Radio Sci., vol. 52, no. 10, pp. 1293 - 1300, 2017.
M. Usis, Goodman, A., Schwartz, L., Kazdan, D., Collins, K., Gibbons, J., Sastry, S., Ayres, L., Brault, C., Byas, S., Dimple, M., Dowell, M., Eggert, R., Erdag, A., Ervin, J., Goodwin, D., Nelson, S., Nichols, S., Tulgetske, O., and Zorman, C., “Detecting changes in along-path HF propagation during the April 2024 total solar eclipse with radio amateurs and low-cost instrumentation”, Frontiers in Astronomy and Space Sciences, 2026.
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.
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.
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.
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.
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.
N. A. Frissell, Brandt, L., Cerwin, S. A., Collins, K. V., Kazdan, D., Gibbons, J., Engelke, W. D., Frissell, R. M., Gerzoff, R. B., Kaeppler, S. R., Ledvina, V., Liles, W., Lombardi, M., MacDonald, E., Di Mare, F., Miller, E. S., Perry, G. W., Rizzo, J. D., Sanchez, D. F., H. Serra, L., H. Silver, W., Themens, D. R., and West, M. Lou, “Amateur Radio: An Integral Tool for Atmospheric, Ionospheric, and Space Physics Research and Operations”, White Paper Submitted to the National Academy of Sciences Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033, 2022.
N. A. Frissell, Brandt, L., Cerwin, S. A., Collins, K. V., Kazdan, D., Gibbons, J., Engelke, W. D., Frissell, R. M., Gerzoff, R. B., Kaeppler, S. R., Ledvina, V., Liles, W., Lombardi, M., MacDonald, E., Di Mare, F., Miller, E. S., Perry, G. W., Rizzo, J. D., Sanchez, D. F., H. Serra, L., H. Silver, W., Themens, D. R., and West, M. Lou, “Amateur Radio: An Integral Tool for Atmospheric, Ionospheric, and Space Physics Research and Operations”, White Paper Submitted to the National Academy of Sciences Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033, 2022.
Conference Proceedings
K. V. Collins, “WWV/H Scientific Modulation Working Group: Designing for Citizen Science”, HamSCI Workshop 2022. HamSCI, Huntsville, AL, 2022.