What Drives the Variability of the Mid-Latitude Ionosphere?

Larisa P Goncharenko1, Shunrong Zhang2, Philip John Erickson1, V Lynn Harvey3, Mary Elizabeth Spraggs2 and Astrid I Maute4, (1)MIT Haystack Observatory, Westford, United States, (2)MIT Haystack Observatory, Westford, MA, United States, (3)Laboratory for Atmospheric and Space Physics, Boulder, CO, United States, (4)University of Colorado, Boulder, CIRES, Boulder, United States