S. A.  Cerwin, Bilberry, P., Blackshear, S., McMahan, J. T., Collins, K. V., and Frissell, N. A., ?Estimation of Ionospheric Layer Height by Measuring the Time Difference of Arrival (TDOA) Between 1 and 2 Hop Propagation Modes. 2023 Annular Eclipse Observations?, HamSCI Workshop 2024. HamSCI, Cleveland, OH, 2024.

S.  Fernandes, Perry, G. W., Trigo, T., Frissell, N. A., and Gibbons, J., ?Exploring Ionospheric Variability Through Doppler Residuals: A Study Utilizing the HamSCI Grape V1 Receiver?, HamSCI Workshop 2024. HamSCI, Cleveland, OH, 2024.

R. B.  Gerzoff and Frissell, N. A., ?Extreme Values in Short-Term 20 m Sequential Matched WSPR Observations?, HamSCI Workshop 2024. HamSCI, Cleveland, OH, 2024.

S.  Cerwin, Collins, K. V., Joshi, D., and Frissell, N. A., ?Estimation of Ionospheric Layer Height Changes From Doppler Frequency and Time of Flight Measurements on HF Skywave Signals?, HamSCI Workshop 2021. HamSCI, Scranton, PA (Virtual), 2021.

N. A.  Frissell, Perry, G., Miller, E. S., Shovkoplyas, A., Moses, M., James, H., and Yau, A., ?e-POP Radio Science Using Amateur Radio Transmissions?, in Fall AGU - Poster Presentation, San Francisco, CA, 2015.