Simultaneous Satellite and Ground Based Observations of Polar Cap Phenomena

T. Obara, T. Mukai, H. Hayakawa, A. Matsuojca, K. Tsuruda, K. Fukui, J. V. Rodriguez, C. E. Valladares

Research output: Contribution to journalArticlepeer-review


In order to understand the processes of formation and motion of sun-aligned polar cap arcs as well as patches, we have analyzed simultaneous observations from the Akebono (EXOS-D) satellite and ground based instruments at Qaanoaq. Results demonstrated the correspondence between the localized electron precipitation signatures observed from Akebono and multiple sun-aligned arcs observed using an all sky camera (ASC) at Qaanaaq and have confirmed that sun-aligned arcs correspond to div.E < 0. We also confirmed the time delay of appearance and disappearance of sun-aligned arcsinresponse to IMF change. As for patches, most of the patches drifted anti-sunward, but some ceased to drift within field of view of the all sky camera. Results of comparison between patch movement and the convection demonstrated a general consistency between them.

Original languageEnglish
Pages (from-to)935-946
Number of pages12
Journaljournal of geomagnetism and geoelectricity
Issue number42496
Publication statusPublished - 1996
Externally publishedYes

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)


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