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Simultaneous optical observations of transpolar arcs in the two polar caps
Author(s) -
Craven J. D.,
Murphree J. S.,
Frank L. A.,
Cogger L. L.
Publication year - 1991
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/91gl02308
Subject(s) - north pole , polar , noon , clockwise , geodesy , latitude , geology , polar cap , meridian (astronomy) , midnight , physics , middle latitudes , geophysics , optics , atmospheric sciences , astronomy , amplitude , geography , physical geography
Optical observations with DE 1 and Viking demonstrate conclusively that transpolar arcs can be present simultaneously at polar latitudes in both hemispheres. The arcs observed here are aligned parallel to one another on opposite sides of the magnetic pole, and relative to the noon‐midnight meridian are rotated slightly in the counterclockwise direction when viewed from above the North Pole.