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DMSP F6
December 13, 1985
1158 - 1204 UT
GLAT
80
19
75
70
(a)
DMSP F6
December 13, 1985
1340 - 1346 UT
GLAT
75
70
(b)
Figure 10.4a Outlines of auroral images photographed from the DMSP F6 satellite in
the Northern Hemisphere at around (a) 1202 UT and (b) 1345 UT on December 13, 1985.
In (a), giant (type 2) undulations are seen on the equatorward boundary of the diffuse
aurora near 19 MLT. The undulations in (b) are thought to be type 2 undulations in the
early stages of development. [After Yamamoto et al. (1994). Reproduced with permission
of the American Geophysical Union.]
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