Dayside variation in auroral conjugacy
作者:
Dale F. Dickinson,
Stephen B. Mende,
David S. Evans,
期刊:
Geophysical Research Letters
(WILEY Available online 1986)
卷期:
Volume 13,
issue 1
页码: 68-71
ISSN:0094-8276
年代: 1986
DOI:10.1029/GL013i001p00068
数据来源: WILEY
摘要:
Observations of charged particle precipitation measured near Frobisher Bay by the NOAA‐7 and ‐8 satellites were compared with simultaneous photographs of auroras made by an image‐intensified, all‐sky camera located at the South Pole Station (the nominal magnetic conjugate point). The results show that auroral phenomena have a high degree of correlation between the two locations and demonstrate the expected poleward migration of the location of the auroras within each individual hemisphere during the midday hours. In addition, a systematic variation in the location of auroral phenomena in one hemisphere relative to the other is observed during the course of the day. The northern aurora moves further poleward in the noon to afternoon (magnetic local time) than does its southern counterpart. In contrast, the morning hours before 0900 MLT, show the northern features closer to the equator than the southern features. The conjugate point to the south pole, in effect, displayed a shift of approximately eight degrees during the course o
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