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2.1. Climatology
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Advances in ionospheric physics:
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1.2 The Applications
2. Recent Advances
2.1. Climatology
2.1.1. A global perspective.
2.1.2. Regional F-region results.
H/O transition height.
Electric fields.
2.1.3. The lower ionospheric domain
2.2. Weather
U.S. National Report to IUGG, 1991-1994
Rev. Geophys. Vol. 33 Suppl., © 1995 American Geophysical Union