TY - JOUR T1 - Modeling Amateur Radio Soundings of the Ionospheric Response to the 2017 Great American Eclipse JF - Geophysical Research Letters Y1 - 2018 A1 - N. A. Frissell A1 - J. D. Katz A1 - S. W. Gunning A1 - J. S. Vega A1 - A. J. Gerrard A1 - G. D. Earle A1 - M. L. Moses A1 - M. L. West A1 - J. D. Huba A1 - P. J. Erickson A1 - E. S. Miller A1 - R. B. Gerzoff A1 - W. Liles A1 - H. W. Silver AB -

On 21 August 2017, a total solar eclipse traversed the continental United States and caused large‐scale changes in ionospheric densities. These were detected as changes in medium and high frequency radio propagation by the Solar Eclipse QSO Party (SEQP) citizen science experiment organized by the Ham Radio Science Citizen Investigation (hamsci.org). This is the first eclipse‐ionospheric study to make use of measurements from a citizen‐operated, global‐scale HF propagation network and develop tools for comparison to a physics‐based model ionosphere. Eclipse effects were observed ±0.3 hr on 1.8 MHz, ±0.75 hr on 3.5 and 7 MHz, and ±1 hr on 14 MHz and are consistent with eclipse‐induced ionospheric densities. Observations were simulated using the PHaRLAP raytracing toolkit in conjunction with the eclipsed SAMI3 ionospheric model. Model results suggest 1.8, 3.5, and 7 MHz refracted at h ≥ 125 km altitude with elevation angles θ ≥ 22°, while 14 MHz signals refracted at h < 125 km with elevation angles θ < 10°.

VL - 45 UR - https://doi.org/10.1029/2018GL077324 ER - TY - CONF T1 - Fitting Ionospheric Models Using Real-Time HF Amateur Radio Observations T2 - NSF CEDAR (Coupling, Energetics, and Dynamics of Atmospheric Regions) Y1 - 2017 A1 - J. D. Katz A1 - N. A. Frissell A1 - J. S. Vega A1 - A. J. Gerrard A1 - R. B. Gerzoff A1 - P. J. Erickson A1 - E. S. Miller A1 - M. L. Moses A1 - F. Ceglia A1 - D. Pascoe A1 - N. Sinanis A1 - P. Smith A1 - R. Williams A1 - A. Shovkoplyas JF - NSF CEDAR (Coupling, Energetics, and Dynamics of Atmospheric Regions) CY - Keystone, CO ER - TY - CONF T1 - HamSCI and the 2017 Total Solar Eclipse T2 - NSF CEDAR (Coupling, Energetics, and Dynamics of Atmospheric Regions) Y1 - 2017 A1 - N. A. Frissell A1 - J. R. Ackermann A1 - G. D. Earle A1 - P. J. Erickson A1 - A. J. Gerrard A1 - R. B. Gerzoff A1 - S. W. Gunning A1 - M. Hirsch A1 - J. D. Katz A1 - S. R. Kaeppller A1 - R. W. McGwier A1 - E. S. Miller A1 - M. L. Moses A1 - G. Perry A1 - S. E. Reyer A1 - A. Shovkoplyas A1 - H. W. Silver A1 - J. S. Vega A1 - RBN Team JF - NSF CEDAR (Coupling, Energetics, and Dynamics of Atmospheric Regions) CY - Keystone, CO ER - TY - CONF T1 - HamSCI: The Ham Radio Science Citizen Investigation (Banquet Presentation) T2 - NSF CEDAR (Coupling, Energetics, and Dynamics of Atmospheric Regions) Y1 - 2017 A1 - N. A. Frissell A1 - J. R. Ackermann A1 - J. Dzekevich A1 - G. D. Earle A1 - P. J. Erickson A1 - A. J. Gerrard A1 - R. B. Gerzoff A1 - S. W. Gunning A1 - M. Hirsch A1 - J. D. Katz A1 - S. R. Kaeppler A1 - R. W. McGwier A1 - E. S. Miller A1 - M. L. Moses A1 - G. Perry A1 - S. E. Reyer A1 - A. Shovkoplyas A1 - H. W. Silver A1 - J. S. Vega A1 - RBN Team JF - NSF CEDAR (Coupling, Energetics, and Dynamics of Atmospheric Regions) CY - Keystone, CO ER -