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3.1. Understanding Solar
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Advances in ionospheric physics:
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2.2. Weather
3. Comments, Conclusions, and Future Directions
3.1. Understanding Solar and Thermospheric Controls
3.1.1. Ionization and solar fluxes.
3.1.2. Thermospheric influences.
3.2. Summary of Results and Future Directions
U.S. National Report to IUGG, 1991-1994
Rev. Geophys. Vol. 33 Suppl., © 1995 American Geophysical Union
