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Acknowledgments
I would like to acknowledge the people who helped and encouraged me throughout this
study. I am grateful to Prof. II. Fukunishi for his guidance and encouragement from the
beginning to the completion of this study. I am especially indebted to Prof. S. Okano in the
National Institute of Polar Research for valuable discussion on development of the Fabry-
Perot Doppler Imaging System. I wish to thank Profs. H. Oya, A. Morioka and Dr. T. Ono
for their useful comments. I express my deep appreciation to Drs. S. Watanabe, I. Murata
and Y. Takahashi for their useful advice. I would also like to acknowledge Mr. Y. Niihara
and Mrs. K. Sakanoi for their helpful suggestions in dealing with the FPDIS data, Mr. Y.
Yamada and other members of the Laboratory for helpful assistance and encouragement.
Appreciation is extended to Profs. G. Hernandez and R. W. Smith in University of
Alaska, Dr. H. Nakajima in the Solar Terrestrial Environment Laboratory, Dr. M. Ishii
in the Communication Research Laboratory for their helpful comments and suggestions in
the FPDIS data analysis. I would like to express my appreciation to Prof. K. Yokoyama,
the leader of the 35-st wintering party of Japanese Antarctica Research Expedition, for his
kind suggestions and help, and to all members of the wintering party of JARE35 for their
warmhearted encouragement and support during my stay at Syowa station, Antarctica.
I greatly appreciate my parents, Mao and Yoshiko Kubota, for their support and encour-
agement throughout my study in the graduate school.
Geomagnetic data and all-sky auroral images were provided by the World Data Center-
C2 for aurora in NIPR. The TIGCM model results were provided by Prof. R. G. Roble
in the National Center of Atmospheric Research. This thesis was edited and printed by a
desk-top publishing software TAW. A free graphic software Gp were used for plotting the
figures in this thesis.