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Method of characteristics in spherical geometry applied to a Harang-discontinuity situation

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Figure

Table 1. Spherical cap noninteger degrees n k …m† for cap half angle # 0 ˆ 20
Fig. 1. Magnetic ®eld of an eastward-¯owing ionospheric sheet current of 1000 mA/m at 70  latitude, immediately below the ionosphere; the 637-nT magnetic ®eld vectors at the latitude of current ¯ow have been deleted to show the small ``nonlocal'' e€ect bet
Fig. 2. Components of conductance tensor R ˆ , including polarization e€ects, for a dipole main magnetic ®eld; in relative units, with R H  2 and R P  1 (see horizontal dotted lines)
Fig. 4. STARE electric ®eld data for 27 October 1979, 17:39 UT, with Scandinavian coastline (data courtesy of E

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