fig04.htm

Figure 4. Measurements of electron density variation at 70 km (1) and calculations (2-5) carried out by four values of [O 3] ozone concentration: 5.0times 107 cm-3  (2), 2.2times 108 cm-3  (3), 109 cm-3  (4), and 6.0times 1010 cm-3  (5) during 13 August 1989 proton event (a) and 23 October 1989 proton event (b).


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