Saturn's Nightside Dynamics During Cassini's F Ring and Proximal Orbits: Response to Solar Wind and Planetary Period Oscillation Modulations - Bradley, TJ; Cowley, SWH; Bunce, EJ; Melin, H; Provan, G; Nichols, JD; Dougherty, MK; Roussos, E; Krupp, N; Tao, C; Lamy, L; Pryor, WR; et al. (JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2020)