N. A.  Frissell, Sanchez, D. F., Perry, G. W., Joshi, D., Engelke, W. D., Thomas, E. G., Coster, A., Erickson, P. J., J. Ruohoniemi, M., and Baker, J. B. H., ?Sources of Large Scale Traveling Ionospheric Disturbances Observed using HamSCI Amateur Radio, SuperDARN, and GNSS TEC?, in NSF CEDAR (Coupling, Energetics, and Dynamics of Atmospheric Regions), Virtual, 2021.