Plasma fluctuations in the upper atmosphere can distort radio signals as they pass into space, damaging radio communication with satellites. The ISX (Ionospheric Scintillation Explorer) mission will study these effects by measuring and comparing digital TV signals produced on the ground. Developed as a collaboration between SRI International and PolySat at Cal Poly, San Luis Obispo, the ISX mission will attempt to improve our understanding of these plasma irregularities and help model space weather predictions in the future.