Density perturbation mode structure of high frequency compressional and global Alfvén eigenmodes in the National Spherical Torus Experiment using a novel reflectometer analysis techniqueCrocker, N. A.Kubota, S.Peebles, W. A.Rhodes, T. L.Fredrickson, E. D.Belova, E.Diallo, A.LeBlanc, B. P.Sabbagh, S. A.Dataset2017